{"id":10352,"date":"2016-10-26T09:11:18","date_gmt":"2016-10-26T15:11:18","guid":{"rendered":"http:\/\/www.aftermarketsuspensionparts.com\/blog\/?p=10352"},"modified":"2025-10-09T10:23:10","modified_gmt":"2025-10-09T16:23:10","slug":"do-it-yourself-liquid-urethane-motor-mount-replacement-inserts","status":"publish","type":"post","link":"https:\/\/www.suspension.com\/blog\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\/","title":{"rendered":"Do It Yourself | Liquid Urethane Motor Mount Inserts"},"content":{"rendered":"<div class=\"container\">\n<div class=\"row\">\n<div class=\"col-md-12\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-liquid-urethane-motor-mount-kit.jpg\" class=\"img-fluid rounded\" alt=\"diy-liquid-urethane-motor-mount-kit\">\n\t\t<\/div>\n<\/p><\/div>\n<div class=\"row\">\n<div class=\"col-md-8 ml-auto mr-auto text-center\">\n<h3 class=\"title\">A complete guide to <b><a href=\"https:\/\/www.suspension.com\/diymmi\">making your own motor mount inserts<\/a><\/b><\/h3>\n<p class=\"mx-auto\">By filling the voids in your motor mounts with liquid urethane you can achieve quicker throttle response and more power to the ground without investing a lot of cash. If you&rsquo;ve already done your <a href=\"\/blog\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\/#pro\">research<\/a>, and you know for sure you want the DIY liquid urethane motor mount insert kit, skip down to the actual <a href=\"\/blog\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\/#materials\">process of making a motor mount insert<\/a>. Be sure to check out the video below for a step-by-step visual aid of the process. If you need a little convincing, keep reading.\n\t\t<\/div>\n<\/p><\/div>\n<div class=\"row\">\n<div class=\"col-md-10 mx-auto\">\n<div class=\"embed-responsive embed-responsive-16by9\">\n\t\t\t\t<iframe src=\"https:\/\/player.vimeo.com\/video\/233718019\" style=\"border:none; allowfullscreen\"><\/iframe>\n\t\t\t<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\n<div class=\"container mt-3\">\n<div class=\"row\">\n<div class=\"col-md-4\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-before.jpg\" class=\"img-fluid\" alt=\"motor mount without liquid urethane insert\">\n\t\t<\/div>\n<div class=\"col-md-4 text-center\">\n<h4 class=\"title\">Table of Contents:<\/h4>\n<ul>\n<li><a href=\"https:\/\/www.suspension.com\/blog\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\/#pro\">Pros and Cons<\/a><\/li>\n<li><a href=\"https:\/\/www.suspension.com\/blog\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\/#formula\">Hardness Options<\/a><\/li>\n<li><a href=\"https:\/\/www.suspension.com\/blog\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\/#materials\">Materials Required<\/a><\/li>\n<li><a href=\"https:\/\/www.suspension.com\/blog\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\/#prep\">Prepping the Mounts<\/a><\/li>\n<li><a href=\"https:\/\/www.suspension.com\/blog\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\/#set\">Setting up the Mounts<\/a><\/li>\n<li><a href=\"https:\/\/www.suspension.com\/blog\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\/#mixing\">Mixing the Urethane<\/a><\/li>\n<li><a href=\"https:\/\/www.suspension.com\/blog\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\/#pouring\">Pouring the Urethane<\/a><\/li>\n<li><a href=\"https:\/\/www.suspension.com\/blog\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\/#finished\">Finished Product<\/a><\/li>\n<\/ul><\/div>\n<div class=\"col-md-4\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-final.jpg\" class=\"img-fluid\" alt=\"motor mount with liquid urethane insert\">\n\t\t<\/div>\n<\/p><\/div>\n<\/div>\n<div class=\"project-3 section-grey mt-5 pb-5\">\n<div class=\"container\" id=\"pro\">\n<div class=\"row\">\n<div class=\"col-md-12\">\n<h3 class=\"text-center title\">But first&#8230;<\/h3>\n<\/p><\/div>\n<div class=\"col-md-10 mx-auto\">\n<p>Before you dive into creating your own motor mount insert, its a good idea to understand the few basic principles of motor mount inserts and why you would even want to use them. There are pros and cons, like everything, in making your motor mounts more solid. So before you do, here&#8217;s a few pros\/cons:<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"row\">\n<div class=\"col-md-4 ml-auto\">\n<h4 class=\"text-center\">The Pros<\/h4>\n<ul>\n<li>Increase Horsepower Potential<\/li>\n<li>Reduce Wheel Hop<\/li>\n<li>More Responsive Motor<\/li>\n<\/ul><\/div>\n<div class=\"col-md-4 mr-auto\">\n<h4 class=\"text-center\">The Cons<\/h4>\n<ul>\n<li>Increase Cabin Vibration<\/li>\n<li>Increase Cabin Noise<\/li>\n<\/ul><\/div>\n<\/p><\/div>\n<div class=\"row pt-3\">\n<div class=\"col-md-10 mx-auto\">\n<p>So taking those pros and cons a bit deeper, the first and foremost reason to firm up your motor mounts is to hold the engine firmly in place. Often the more pliable stock motor mounts allow the engine to move excessively &#8211; resulting in wheel hop and loss of power. The more extreme version of this is when an owner has to increase the vehicle&#8217;s horsepower more than the stock motor mounts were designed to handle. This can cause tearing of the stock motor mounts as well as damage to the engine and engine bay should the engine be allowed too much movement.<\/p>\n<p>Easily the most frustrating result of solid motor mounts is increased vibration felt by passengers in the vehicle. Stock motor mounts are designed with a fair amount of flex, designed to absorb natural motor vibration and reduce vibration noise. In most cases, this increase in noise and vibration is not terribly significant, however, it is increased by the firmness of the urethane used to fill the mount and the number of mounts that are filled.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"row\">\n<div class=\"col-md-12 mx-auto\">\n<h3 class=\"text-center title\">Cabin Noise, Really?<\/h3>\n<\/p><\/div>\n<div class=\"col-md-6 ml-auto\">\n<p>The trade-off for increased performance is cabin noise and vibration. The harder, more firm your motor mounts are the more efficiently they will transfer horsepower to the wheels. Likewise, the softer the motor mounts are the less vibration and noise will be transferred to the rest of the vehicle. There are a number of ways to make the trade-off between vibration\/noise increase and performance.<\/p>\n<\/p><\/div>\n<div class=\"col-md-4 mr-auto\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/images\/diymmi\/diymmi-cabin-noise.png\" class=\"img-fluid\" alt=\"liquid urethane motor mount cabin noise\">\n\t\t<\/div>\n<\/p><\/div>\n<div class=\"row pt-3\">\n<div class=\"col-md-12\">\n<h3 class=\"text-center title\">Firming up the Correct Motor Mounts<\/h3>\n<\/p><\/div>\n<div class=\"col-md-10 mx-auto\">\n<p>Most Front Wheel Drive vehicles have several motor mounts, typically 4 or 5. Some of the motor mounts are designed significantly different from the others. TORQUE mounts are the motor mounts designed to reduce the amount of engine movement when power is applied. Main Mounts are the mounts designed to support and hold the weight of the engine.<\/p>\n<p>Torque mounts are the most effective mounts at providing a great rigidity to the engine assembly without transmitting as much natural vibration to the driver. Torque mounts are typically located at the front end or rear of the engine. Main mounts are typically located higher on the engine assembly as the engine weight usually hangs from these.<\/p>\n<p>While it is typically possible to firm up all the mounts on a vehicle &#8211; the torque mounts will provide the best trade-off between performance and vibration.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"row\" id=\"formula\">\n<div class=\"col-md-12 mx-auto\">\n<h3 class=\"text-center title\">Using a Softer or Harder Universal Motor Mount Insert Formula<\/h3>\n<p class=\"text-center\">With four choices in hardness, there is a formula for any level of desired performance<\/p>\n<\/p><\/div>\n<div class=\"col-md-8 mx-auto\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/images\/diymmi\/diymmi-urethane-choice.png\" class=\"img-fluid\" alt=\"liquid urethane motor mount durometer choices\">\n\t\t<\/div>\n<div class=\"col-md-10 mx-auto\">\n<h4 class=\"title text-center \">There are several firmness or &#8220;durometer&#8221; levels offered:<\/h4>\n<ul>\n<li><strong>60A &#8211; For the Daily Driver<\/strong> &#8211; This is the softest formula offered that will still make a noticeable difference in vehicle performance. This softer formula is best for tuners that still want to increase performance without trading off as much personal comfort.<\/li>\n<li><strong>80A &#8211; Even trade off between performance and vibration<\/strong> &#8211; When it comes to motor mount inserts, this formula is the most popular for its ability to significantly increase vehicle performance while still allowing some small amount of flex in the mounts to keep vibration and noise to reasonable levels.<\/li>\n<li><strong>80A HIGH PERFORMANCE &#8211; The next best step<\/strong> &#8211; A newer version of the most popular choice balances high performance with ride quality, while boasting a higher tear rate and standing up to heat even better.<\/li>\n<li><strong>94A &#8211; Race Quality<\/strong> &#8211; Not for the daily driver. This formula is the hardest of the 4 available. Providing the best reduction in motor movement &#8211; this version will also allow a rather significant amount of engine vibration to be transmitted into the vehicle. Best you can get without going with an aluminum mount.<\/li>\n<\/ul><\/div>\n<\/p><\/div>\n<\/div>\n<\/div>\n<div class=\"container mt-3\" id=\"first\">\n<div class=\"row\">\n<div class=\"col-md-8 mx-auto\">\n<h2 class=\"text-center title mx-auto\">Instructions &#8211; <br \/>DIY Motor Mount Inserts<\/h2>\n<\/p><\/div>\n<div class=\"row\" id=\"materials\">\n<div class=\"col-md-12 mx-auto\">\n<h3 class=\"text-center title\">Materials Required for this Project:<\/h3>\n<\/p><\/div>\n<div class=\"col-md-10 mx-auto\">\n<p>All items listed are absolutely required in order to complete this project safely and easily. In total, they shouldn&#8217;t cost you more than $10 from your local Home-Depot or Wal-Mart (aside from the actual urethane). Save yourself future frustration and buy these before starting the project!<\/p>\n<\/p><\/div>\n<div class=\"col-md-10 mx-auto\">\n<ul>\n<li>Liquid Urethane &#8211; available in the <a href=\"\/diymmi\" target=\"_blank\" rel=\"noopener noreferrer\">60A, 80A, 80A High Performance, and 94A<\/a><\/li>\n<li>Contact Cement &#8211; Helps the duct tape seal against greasy surfaces<\/li>\n<li>Duct Tape &#8211; Seals one side of the mount<\/li>\n<li>De-greaser &#8211; Cleans the mount of grease and oil<\/li>\n<li>SAND &#8211; in a box &#8211; vital to the project &#8211; DO NOT skip this step<\/li>\n<li>Level &#8211; ensures the mount is level before pouring<\/li>\n<li>(optional) Oven &#8211; allows for faster curing time<\/li>\n<\/ul><\/div>\n<div class=\"col-md-8 mx-auto\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-materials1.jpg\" class=\"img-fluid\" alt=\"materials for diy urethane motor mount insert\">\n\t\t<\/div>\n<\/p><\/div>\n<div class=\"row\">\n<div class=\"col-md-10 mx-auto\">\n<h3 id=\"prep\" class=\"title text-center\">Prepping The Mounts<\/h3>\n<h4><b>Step One &#8211; CLEAN!<\/b><\/h4>\n<p>For the urethane to bond correctly and to ease the overall process &#8211; the mounts must be thoroughly cleaned of grease and dirt. A little cheap degreaser can go a long way over simple soap. Take the time to use real degreaser &#8211; it&#8217;s usually just a spray on &#8211; spray off process anyway.<\/p>\n<\/p><\/div>\n<div class=\"col-md-8 mx-auto\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-clean1.jpg\" class=\"img-fluid rounded\" alt=\"cleaning motor mount for liquid urethane insert\"><\/p>\n<blockquote><p>Cleaning the mounts with a degreaser will allow the urethane to properly bond to the rubber<\/p><\/blockquote><\/div>\n<\/p><\/div>\n<div class=\"row\">\n<div class=\"col-md-10 mx-auto\">\n<h4><b>Step Two &#8211; Sealing One Side<\/b><\/h4>\n<p>The motor mount inserts are made by pouring a liquid urethane into the voids of the mounts and allowing it to dry. In order to do this, you&#8217;ll need to completely seal off one side of the mounts. When you first pour the urethane into the mounts it will have a very liquid consistency. Even the smallest hole in your sealing jobs will allow the urethane to seep out.<\/p>\n<\/p><\/div>\n<div class=\"col-md-8 mx-auto\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-contact-cement1.jpg\" class=\"img-fluid rounded\" alt=\"adhesive for liquid urethane motor mount preparation\"><\/p>\n<blockquote><p>Contact cement will give you an improved seal job to ensure your urethane stays in the mount<\/p><\/blockquote><\/div>\n<\/p><\/div>\n<div class=\"row\">\n<div class=\"col-md-10 mx-auto\">\n<p>The best way to do this is with some contact cement and duct tape. While duct tape alone will usually work &#8211; the contact cement will ensure a good seal &#8211; especially if there&#8217;s any greasy residue on the mounts (the tape will not adhere properly). Start by painting the outside edge and inside circumference of the side of the mount you&#8217;re going to seal off &#8211; with contact cement. Anywhere you need to be sure there&#8217;s a good seal &#8211; use this liberally &#8211; you&#8217;ll be able to pull\/scrape it off later.<\/p>\n<\/p><\/div>\n<div class=\"col-md-8 mx-auto\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-cement.jpg\" class=\"img-fluid rounded\" alt=\"applying rubber cement to motor mount\">\n\t\t<\/div>\n<\/p><\/div>\n<div class=\"row pt-3\">\n<div class=\"col-md-10 mx-auto\">\n<p>Once you&#8217;ve set a good layer of contact cement, seal off the mount with the duct tape. Use several strips of tape at different angles from the center of the mount. Continue adding tape around the center of the mount until you&#8217;ve sealed it off completely. Some users won&#8217;t have the center sleeve sticking out of one side and won&#8217;t have to work around it &#8211; either way just keep adding tape until it&#8217;s properly sealed off.<\/p>\n<\/p><\/div>\n<div class=\"col-md-8 mx-auto\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-tape-start.jpg\" class=\"img-fluid rounded\" alt=\"sealing the motor mount with duct tape\">\n\t\t<\/div>\n<\/p><\/div>\n<div class=\"row pt-3\">\n<div class=\"col-md-10 mx-auto\">\n<p>Duct tape is cheap &#8211; so use as much as necessary until you feel good about the job &#8211; then add a little more.<\/p>\n<\/p><\/div>\n<div class=\"col-md-8 mx-auto\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-tape-full.jpg\" class=\"img-fluid rounded\" alt=\"motor mount sealed with duct tape\"><\/p>\n<blockquote><p>The better the tape job, the better the mount will turn out<\/p><\/blockquote><\/div>\n<\/p><\/div>\n<\/div>\n<div class=\"container\" id=\"set\">\n<div class=\"row\">\n<div class=\"col-md-12 mx-auto\">\n<h3 class=\"text-center title\">Setting Up the Mounts<\/h3>\n<\/p><\/div>\n<div class=\"col-md-10 mx-auto\">\n<p>It&#8217;s important that the mounts are completely level before you pour the urethane into them. If they&#8217;re laying at an angle the mount will not turn out right.<\/p>\n<p>Prepare a small box of sand for the mounts. Setting the mounts into the sand will serve two purposes:<\/p>\n<ol>\n<li>Allow a perfectly level placement &#8211; even if there are protrusions from the mounts that would otherwise make it sit screwy<\/li>\n<li>Help seal off any small holes in your sealing job. If the hole is small, a little urethane will leak out into the sand and the sand will help it congeal faster &#8211; effectively sealing the hole in the mount<\/li>\n<\/ol><\/div>\n<div class=\"col-md-8 mx-auto\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-sand.jpg\" class=\"img-fluid rounded\" alt=\"using sand to level motor mount for liquid urethane\">\n\t\t<\/div>\n<\/p><\/div>\n<div class=\"row pt-3\">\n<div class=\"col-md-10 mx-auto\">\n<p><strong>DO NOT attempt to do this without the sandbox.<\/strong> While it is possible to do so &#8211; using the sandbox will help ensure you do the job right the first time. Once you mix the urethane, you&#8217;ll only have 15-20 minutes of working time before the urethane is to firm to pour. You won&#8217;t have enough time to decide you SHOULD have used the sandbox.<\/p>\n<\/p><\/div>\n<div class=\"col-md-8 mx-auto\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-level.jpg\" class=\"img-fluid rounded\" alt=\"do not skip using sand to level motor mount\"><\/p>\n<blockquote><p>Don&#8217;t skip the sand and the level, once you mix the urethane you won&#8217;t have time to realize you shouldn&#8217;t have skipped this step<\/p><\/blockquote><\/div>\n<\/p><\/div>\n<\/div>\n<div class=\"container\" id=\"mixing\">\n<div class=\"row\">\n<div class=\"col-md-12 mx-auto\">\n<h3 class=\"text-center title\">Mixing the Urethane<\/h3>\n<\/p><\/div>\n<div class=\"col-md-12 mx-auto\">\n<p class=\"text-center title\"><strong><i>DO NOT DO THIS UNTIL YOU&#8217;RE 100% Ready to Pour!<\/i><\/strong><\/p>\n<\/p><\/div>\n<div class=\"col-md-10 mx-auto\">\n<p class=\"text-center\">The correct mixing ratio is absolutely VITAL to the urethane setting correctly. That&#8217;s why each set comes in a pre-measured container. Do not attempt to use only PART of a kit &#8211; doing so may cause the urethane to not set correctly.<\/p>\n<h4>Each kit should include:<\/h4>\n<ul>\n<li>Urethane &#8211; in the hardness level you ordered. Comes in small paint can style container<\/li>\n<li>Activator &#8211; a very liquid substance in a small bottle <b>*For dried activator: According to the manufacturer, Forsch, you can reheat the product in the microwave (or boiling water for 5&ndash;10 seconds). Check the sticker on the lid for the exact temperature needed to return it to liquid form. Note: The formula was recently updated to a solid state to make shipping easier.<\/b> <\/li>\n<li>Stirring Stick<\/li>\n<\/ul><\/div>\n<div class=\"col-md-8 mx-auto\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-contents1.jpg\" class=\"img-fluid rounded\" alt=\"contents of liquid urethane kit\">\n\t\t<\/div>\n<\/p><\/div>\n<div class=\"row pt-3\">\n<div class=\"col-md-10 mx-auto\">\n<p class=\"text-center\">Before doing ANYTHING with these substances read through all the warnings and adhere to them! Most importantly &#8211; mix and use these outside in a well ventilated area.<\/p>\n<\/p><\/div>\n<div class=\"col-md-8 mx-auto\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-open1.jpg\" class=\"img-fluid rounded\" alt=\"open liquid urethane kit in a ventilated area\">\n\t\t<\/div>\n<\/p><\/div>\n<div class=\"row pt-3\">\n<div class=\"col-md-10 mx-auto\">\n<p class=\"text-center\">Remove the lid from the larger paint can containing the urethane and set it aside. Take the bottle of activator and shake it well before adding it to the urethane. <b>*For dried activator: According to the manufacturer, Forsch, you can reheat the product in the microwave (or boiling water for 5&ndash;10 seconds). Check the sticker on the lid for the exact temperature needed to return it to liquid form. Note: The formula was recently updated to a solid state to make shipping easier.<\/b><\/p>\n<\/p><\/div>\n<div class=\"col-md-8 mx-auto\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-mix.jpg\" class=\"img-fluid rounded\" alt=\"mix the liquid urethane and activator\">\n\t\t<\/div>\n<\/p><\/div>\n<div class=\"row pt-3\">\n<div class=\"col-md-10 mx-auto\">\n<p class=\"text-center\">Thoroughly mix the activator and urethane with the provided mixing stick.<\/p>\n<\/p><\/div>\n<div class=\"col-md-8 mx-auto\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-stir1.jpg\" class=\"img-fluid rounded\" alt=\"stir the liquid urethane kit\">\n\t\t<\/div>\n<\/p><\/div>\n<div class=\"row pt-3\">\n<div class=\"col-md-10 mx-auto\">\n<p class=\"text-center\">Be sure to scrape the sides of the can and even scrape off the stirring stick to ensure you&#8217;ve mixed all of the urethane in with the activator.<\/p>\n<p class=\"text-center\">Once you&#8217;ve mixed the urethane and activator you&#8217;re ready to pour it into the mount! <strong>Once the urethane is mixed you only have about 15-20 minutes before it begins to firm up!<\/strong><\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\n<div class=\"container\" id=\"pouring\">\n<div class=\"row\">\n<div class=\"col-md-12 mx-auto\">\n<h3 class=\"text-center title\">Pouring the Urethane<\/h3>\n<\/p><\/div>\n<div class=\"col-md-10 mx-auto\">\n<p class=\"text-center\">Slowly pour the mixed urethane into the open side of the mounts. Allow for the urethane to fill all the voids in the mount. It may take a minute for it to settle completely flat &#8211; so take your time. If it seems to be leaking out a LITTLE &#8211; don&#8217;t panic &#8211; the sand will help clot the urethane in the hole and slow the leak.<\/p>\n<p class=\"text-center\">Fill the mounts to the top &#8211; it&#8217;s even OK if some spills over the outside edge.<\/p>\n<p class=\"text-center\">Once the mounts are full wait about 10 minutes. In 10 minutes the urethane should still be very liquid and you can top off the mounts with the remaining urethane in the can. This is particularly important if you have a small leak in the sealed side of the mount. <strong>Don&#8217;t wait longer than 20 minutes<\/strong> to check up on the mounts as by that time the urethane will start to become less workable.<\/p>\n<p class=\"text-center\">To fully cure at room temperature the urethane takes 7 days, but if you have a way to maintain a temperature of 150 degrees, such as an oven, the urethane will cure in around 18 hours.<\/p>\n<\/p><\/div>\n<div class=\"col-md-5 ml-auto pb-3\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-first-pour1.jpg\" class=\"img-fluid rounded\" alt=\"pouring the liquid urethane mix\">\n\t\t<\/div>\n<div class=\"col-md-5 mr-auto pb-3\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-last-pour1.jpg\" class=\"img-fluid rounded\" alt=\"motor mount filled with liquid urethane\">\n\t\t<\/div>\n<\/p><\/div>\n<\/div>\n<div class=\"projects-3 section-dark pt-3 mt-5\">\n<div class=\"container\">\n<div class=\"row\">\n<div class=\"col-md-12 mx-auto\">\n<h3 class=\"text-center title mb-5\">A Job Not So Well Done<\/h3>\n<\/p><\/div>\n<div class=\"col-md-10 mx-auto\">\n<p class=\"text-center\" style=\"color:white\">It is very important that you use sand. If you do a poor job of setting up the mount in your sand, your results can be disastrous. If there is any type of hole in your sealing job, the urethane can seep out. The sand can stop that, so be sure to pack the sand under the mount in order to clog any leak. If not, you get this:<\/p>\n<\/p><\/div>\n<div class=\"col-md-8 mx-auto\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-bad-sand.jpg\" class=\"img-fluid rounded\" alt=\"how not to pour a liquid urethane motor mount\">\n\t\t<\/div>\n<\/p><\/div>\n<div class=\"row pt-3\">\n<div class=\"col-md-10 mx-auto\">\n<p class=\"text-center\" style=\"color:white\">If the urethane seeps out like this, you&#8217;re final product will be less than desired. Check out the mount we did with a poor sand job:<\/p>\n<\/p><\/div>\n<div class=\"col-md-8 mx-auto\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-bad.jpg\" class=\"img-fluid rounded\" alt=\"poorly sealed liquid urethane motor mount\">\n\t\t<\/div>\n<\/p><\/div>\n<\/div>\n<\/div>\n<div class=\"container\" id=\"finished\">\n<div class=\"row\">\n<div class=\"col-md-12 mx-auto\">\n<h3 class=\"text-center title\">The Finished Product<\/h3>\n<\/p><\/div>\n<div class=\"col-md-10 mx-auto\">\n<p class=\"text-center\">By the next day you should be able to take the mounts out of the sandbox and remove the tape from the opposite side. Sometimes if you had a small leak you&#8217;ll find small clumps of sand attached to the other side &#8211; these pry\/peel off easily and will not affect your new mounts.<\/p>\n<\/p><\/div>\n<div class=\"col-md-8 mx-auto\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-after1.jpg\" class=\"img-fluid rounded\" alt=\"after pouring a liquid urethane motor mount\">\n\t\t<\/div>\n<\/p><\/div>\n<div class=\"row pt-3\">\n<div class=\"col-md-10\">\n<p class=\"text-center\">The tape should pull off easily and if you want to clean them up further you can scrape off the left over contact cement &#8211; however if you really don&#8217;t care too much you could even leave the tape on &#8211; it won&#8217;t hurt anything.<\/p>\n<\/p><\/div>\n<div class=\"col-md-5 ml-auto\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-after2.jpg\" class=\"img-fluid rounded\" alt=\"removing the seal on the motor mount\">\n\t\t<\/div>\n<div class=\"col-md-5 mr-auto\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-after3.jpg\" class=\"img-fluid rounded\" alt=\"trimming away excess urethane\">\n\t\t<\/div>\n<\/p><\/div>\n<div class=\"row\">\n<h2 class=\"text-center mx-auto\">Finished &#8220;Do It Yourself&#8221; Motor Mounts<\/h2>\n<div class=\"col-md-5 mx-auto\">\n\t\t\t<img decoding=\"async\" src=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-final.jpg\" class=\"img-fluid rounded\" alt=\"finished diy liquid urethane motor mount insert\">\n\t\t<\/div>\n<\/p><\/div>\n<\/div>\n<div class=\"container\">\n<div class=\"row\">\n<div class=\"col-md-12 mx-auto\">\n<h3 class=\"text-center title\">Additional Notes For Users<\/h3>\n<\/p><\/div>\n<div class=\"col-md-10 mx-auto\">\n<p class=\"text-center\">Some users have asked if this will work for their mounts if the center portion has completely torn away from the rest of the mount. The answer: YES! The only additional consideration is the correct centering\/alignment of the mounting point that goes through the mount. While the sandbox will make it significantly easier to do this &#8211; special care will be needed to ensure centering and alignment.<\/p>\n<\/p><\/div>\n<div class=\"col-md-12 mx-auto\">\n<h3 class=\"text-center title\">Disclaimer<\/h3>\n<div class=\"col-md-10 mx-auto\">\n<p class=\"text-center\">In using these instructions and urethane kits you accept complete responsibility for the outcome of your project. Only you can ensure this is done correctly and we will not be held responsible if your mounts do not turn out like you wanted.<\/p>\n<p class=\"text-center\">A significant amount of information has been provided here &#8211; however some projects may be unique and will need special attention or a different mode of creation. While we&#8217;re happy to help with any questions &#8211; we cannot guarantee the outcome of your particular project.<\/p>\n<p class=\"text-center\">You may not copy, post or reproduce this &#8220;How To&#8221; information or pictures without written consent from Diverse Suspension Technologies.<\/p>\n<\/p><\/div>\n<div class=\"col-md-5 mx-auto pt-3\">\n<p class=\"text-center\"><a href=\"https:\/\/www.suspension.com\/diymmi\">Do-It-Yourself Mount Mount Inserts<\/a><\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>A complete guide to modifying stock motor mounts by making your own urethane motor mount inserts.<\/p>\n","protected":false},"author":2,"featured_media":10421,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[287,783,967,983],"tags":[],"class_list":["post-10352","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dst","category-how-to-guides","category-polyurethane-bushings","category-suspension-components"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\r\n<title>Do It Yourself | Liquid Urethane Motor Mount Inserts | Suspension.com<\/title>\r\n<meta name=\"description\" content=\"Learn how to create your own Liquid Urethane Motor Mount Replacement Inserts. Very simple Do-It-Yourself method to fix your broken motor mounts.\" class=\"yoast-seo-meta-tag\" \/>\r\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\r\n<link rel=\"canonical\" href=\"https:\/\/www.suspension.com\/blog\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\/\" class=\"yoast-seo-meta-tag\" \/>\r\n<meta property=\"og:locale\" content=\"en_US\" class=\"yoast-seo-meta-tag\" \/>\r\n<meta property=\"og:type\" content=\"article\" class=\"yoast-seo-meta-tag\" \/>\r\n<meta property=\"og:title\" content=\"Do It Yourself | Liquid Urethane Motor Mount Inserts | Suspension.com\" class=\"yoast-seo-meta-tag\" \/>\r\n<meta property=\"og:description\" content=\"Learn how to create your own Liquid Urethane Motor Mount Replacement Inserts. Very simple Do-It-Yourself method to fix your broken motor mounts.\" class=\"yoast-seo-meta-tag\" \/>\r\n<meta property=\"og:url\" content=\"https:\/\/www.suspension.com\/blog\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\/\" class=\"yoast-seo-meta-tag\" \/>\r\n<meta property=\"og:site_name\" content=\"Suspension.com\" class=\"yoast-seo-meta-tag\" \/>\r\n<meta property=\"article:published_time\" content=\"2016-10-26T15:11:18+00:00\" class=\"yoast-seo-meta-tag\" \/>\r\n<meta property=\"article:modified_time\" content=\"2025-10-09T16:23:10+00:00\" class=\"yoast-seo-meta-tag\" \/>\r\n<meta property=\"og:image\" content=\"https:\/\/www.suspension.com\/blog\/wp-content\/uploads\/2016\/10\/diy-feature-1.jpg\" class=\"yoast-seo-meta-tag\" \/>\r\n\t<meta property=\"og:image:width\" content=\"685\" class=\"yoast-seo-meta-tag\" \/>\r\n\t<meta property=\"og:image:height\" content=\"305\" class=\"yoast-seo-meta-tag\" \/>\r\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" class=\"yoast-seo-meta-tag\" \/>\r\n<meta name=\"author\" content=\"Drew Taylor\" class=\"yoast-seo-meta-tag\" \/>\r\n<meta name=\"twitter:label1\" content=\"Written by\" class=\"yoast-seo-meta-tag\" \/>\n\t<meta name=\"twitter:data1\" content=\"Drew Taylor\" class=\"yoast-seo-meta-tag\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" class=\"yoast-seo-meta-tag\" \/>\n\t<meta name=\"twitter:data2\" content=\"16 minutes\" class=\"yoast-seo-meta-tag\" \/>\r\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.suspension.com\\\/blog\\\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.suspension.com\\\/blog\\\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\\\/\"},\"author\":{\"name\":\"Drew Taylor\",\"@id\":\"https:\\\/\\\/www.suspension.com\\\/blog\\\/#\\\/schema\\\/person\\\/9bccaf6443c9846063d6909c67debfbf\"},\"headline\":\"Do It Yourself | Liquid Urethane Motor Mount Inserts\",\"datePublished\":\"2016-10-26T15:11:18+00:00\",\"dateModified\":\"2025-10-09T16:23:10+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.suspension.com\\\/blog\\\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\\\/\"},\"wordCount\":2463,\"commentCount\":51,\"publisher\":{\"@id\":\"https:\\\/\\\/www.suspension.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.suspension.com\\\/blog\\\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.suspension.com\\\/blog\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/diy-feature-1.jpg\",\"articleSection\":[\"DST\",\"How-To\",\"Polyurethane Bushings\",\"Suspension Components\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.suspension.com\\\/blog\\\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.suspension.com\\\/blog\\\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\\\/\",\"url\":\"https:\\\/\\\/www.suspension.com\\\/blog\\\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\\\/\",\"name\":\"Do It Yourself | Liquid Urethane Motor Mount Inserts | Suspension.com\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.suspension.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.suspension.com\\\/blog\\\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.suspension.com\\\/blog\\\/do-it-yourself-liquid-urethane-motor-mount-replacement-inserts\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.suspension.com\\\/blog\\\/wp-content\\\/uploads\\\/2016\\\/10\\\/diy-feature-1.jpg\",\"datePublished\":\"2016-10-26T15:11:18+00:00\",\"dateModified\":\"2025-10-09T16:23:10+00:00\",\"description\":\"Learn how to create your own Liquid Urethane Motor Mount Replacement Inserts. 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