Pick up 3M Windo-Weld Primerless Super Fast Urethane Sealant.

Part number: 51135-08609 (10fl. oz caulking gun tube)

While removing the engine mounts for this upgrade, I noticed that the front mount had a bolt through it that was two sizes too small. I purchased a replacement bolt that perfectly fit the mount. There were never any problems and the car felt much more solid after these engine mount modifications.

Clean the engine mount thoroughly with soap and water. After it has dried, apply the Windo-Weld to fill the rubber portion.

Verify that they are clean and dry, then proceed.

Try to not fill too much at a time. Allow inner layers to partially dry before applying more Window Weld. This will drastically reduce the time it takes for the mounts to harden and be ready to use.

Smooth the Window Weld if you want the mounts to look nice. You can use your fingers and deal with it taking a week to come off, use gloves, or use plastic rap to get a nice smooth finish.

Let the finished product dry for at least a full day. Longer if you overfilled the mounts.

Moderate filling such as this transmitted a noticable amount of vibration into the passenger compartment and steering wheel. For a daily driver, we would recommend that you fill them according to the amount of power your engine now has. Do not completely fill your mounts unless you plan to go past 200 horsepower in the near future. The additional vibrations will eventually rattle interior panels loose and annoy passengers/significant others. You have been warned.

There are stiffer/stronger products out there for more money. Window Weld is perfect for most applications. Before spending more on a "better" engine mount reinforcement, please re-read the previous warning.