Instructions - DIY Motor Mount Inserts
Prepping The Mounts
Step One - CLEAN!
For the urethane to bond correctly and to ease the overall process - 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 - it's usually just a spray on - spray off process anyway.
Step Two - Sealing One Side
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'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.
The best way to do this is with some contact cement and duct tape. While duct tape alone will usually work - the contact cement will ensure a good seal - especially if there'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're going to seal off - with contact cement. Anywhere you need to be sure there's a good seal - use this liberally - you'll be able to pull/scrape it off later.
Once you'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've sealed it off completely. Some users wont have the center piece sticking out of one side and won't have to work around it - either way just keep adding tape until it's properly sealed off.
Duct tape is cheap - so use as much as necessary before you feel good about the job - then add a little more.
Setting Up the Mounts
It's important that the mounts are completely level before you pour the urethane into them. If they're laying at an angle the mount will not turn out right.
Prepare a small box of sand for the mounts. Setting the mounts into the sand will: 1) Allow a perfectly level placement - even if there are protrusions from the mounts that would otherwise make it sit screwy, and 2) 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 - effectively sealing the hole in the mount.
DO NOT attempt to do this without the sand box. While it is possible to do so - using the sand box will help ensure you do the job right the first time. Once you mix the urethane, you'll only have 15-20 minutes of working time before it's too firm to work properly with. You won't have enough time to decide you SHOULD have used the sand box.
Mixing the Urethane
DO NOT DO THIS UNTIL YOU'RE 100% Ready to Pour!
The correct mixing ratio is absolutely VITAL to the urethane setting correctly. That's why each set comes in a pre-measured container. Do not attempt to use only PART of a kit - doing so may cause the urethane to not set correctly
Each kit should include:
- Urethane - in the hardness level you ordered. Comes in small paint can style container
- Activator - a very liquid substance in a small bottle
- Stirring Stick
Before doing ANYTHING with these substances read through all the warnings and adhere to them! Most importantly - mix and use these outside in a well ventilated area.
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.
Thoroughly mix the activator and urethane with the provided mixing stick. Be sure to scrape the sides of the can and even scrape off the stirring stick to ensure you've mixed all of the urethane in with the activator.
Once you've mixed the urethane and activator you're ready to pour it into the mount! Once the urethane is mixed you only have about 15-20 minutes where it's pour-able!
Pouring the Urethane
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 - so take your time. If it seems to be leaking out a LITTLE - don't panic - the sand will help clot up the hole and slow the leak.
Fill the mounts to the top - it's even OK if some spills over the outside edge.
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. Don't wait longer than 20 minutes to check up on the mounts as by that time the urethane will start to become less workable.
A Job Not So Well Done
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 seal 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:
If the urethane seeps out like this, you're final product will be less than desired. Check out the mount we did with a poor sand job:
The Finished Product
By the next day you should be able to take the mounts out of the sand box and remove the tape from the opposite side. Sometimes if you had a small leak you'll find small clumps of sand attached to the other side - these pry/peel off easily and will not affect your new mounts.
The tape should pull off easily and if you want to clean them up further you can scrape off the left over contact cement - however if you really don't care too much you could even leave the tape on - it won't hurt anything.
Finished "Do It Yourself" Motor Mounts
Additional Notes For Users
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 - special care will be needed to ensure centering and alignment.
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.
A significant amount of information has been provided here - however some projects may be unique and will need special attention or a different mode of creation. While we're happy to help with any questions - we cannot guarantee the outcome of your particular project.
You may not copy, post or reproduce this "How To" information or pictures without written consent from Diverse Suspension Technologies.
Do-It-Yourself Mount Mount Inserts