The photos of the mount are from my Mazdaspeed Protege but I'm sure this will work for any mount that has the same type of construction. The stock mounts are made from very soft rubber and have large air holes to help isolate the engine vibrations from the passengers in the car. Filling in these air holes will reduce the amount the engine will rock but may increase vibrations in the car. I used epoxy on a past car and this really made a difference in the way the car drove. Everything inside the car vibrated but it was a Dodge Neon so that isn't really all that uncommon(freak) . I used silicone this time and it seems to be a nice compromise. Plus if you don't like it you can always take it out and try epoxy. I think once it is filled with epoxy it's there to stay.
Materials that can used to fill with listed from softest to hardest
Silicone (dries to a soft rubber)
pros: easy to find, thick so it won't ooze all over, pliable so it stays in place,cheap
cons:takes longer to dry
Liquid urethane (dries to various stiffness of rubber) (thanks OKI BOY)
pros:availiable in different stiffness, dries fast
cons:may breakdown, might be to runny for paper plate? (CustomMSP said he used 3 layers of tape to close off one side. Going right over the center hole. Thanks for the input!)
can't find a picture
Window weld (dries to a hard rubber) (thanks DSM2MSP)
pros:fast drying, stiff, holds up to car enviroment
cons:might be to runny for paper plate? (other ideas?)
Epoxy cement (dries like a piece of hard plastic)
pros:dries very fast, thick consistancy is easy to use)
cons:has no give at all (could be a plus or minus depends on what you want)
Materials needed:
filling material
Paper plate
drying time
1.) Remove the motor mount.
2.) Cut tab that sticks out below the top of the metal to allow mount to sit flush on paper plate.
3.) Cut hole in paper plate to stick metal in center of mount thru the plate.
4.) Place mount on plate with metal sticking thru plate. The point of this is to keep the silicone from going all over the place.
view from bottom
view from top
5.)Fill mount with silicone. (or epoxy or ????)
6.)Let it dry. It was like 80 deg. out the day I did mine and I let it dry about 2 hours before I put it back in the car. I didn't drive the car until the next day.
I havn't noticed any increase in vibration compared to stock and it is a lot easier to drive now with the silicone.
Materials that can used to fill with listed from softest to hardest
Silicone (dries to a soft rubber)
pros: easy to find, thick so it won't ooze all over, pliable so it stays in place,cheap
cons:takes longer to dry

Liquid urethane (dries to various stiffness of rubber) (thanks OKI BOY)
pros:availiable in different stiffness, dries fast
cons:may breakdown, might be to runny for paper plate? (CustomMSP said he used 3 layers of tape to close off one side. Going right over the center hole. Thanks for the input!)
can't find a picture
Window weld (dries to a hard rubber) (thanks DSM2MSP)
pros:fast drying, stiff, holds up to car enviroment
cons:might be to runny for paper plate? (other ideas?)

Epoxy cement (dries like a piece of hard plastic)
pros:dries very fast, thick consistancy is easy to use)
cons:has no give at all (could be a plus or minus depends on what you want)

Materials needed:
filling material
Paper plate
drying time
1.) Remove the motor mount.
2.) Cut tab that sticks out below the top of the metal to allow mount to sit flush on paper plate.

3.) Cut hole in paper plate to stick metal in center of mount thru the plate.

4.) Place mount on plate with metal sticking thru plate. The point of this is to keep the silicone from going all over the place.
view from bottom

view from top

5.)Fill mount with silicone. (or epoxy or ????)

6.)Let it dry. It was like 80 deg. out the day I did mine and I let it dry about 2 hours before I put it back in the car. I didn't drive the car until the next day.
I havn't noticed any increase in vibration compared to stock and it is a lot easier to drive now with the silicone.
Last edited: