OPTION 1 - PREFERRED
3M Windo-weld. urethane blend. its in one of those caulk tubes, so one of those metal guns that you stick them in would be useful, or i guess you can just jam something in the back to squeeze it out. cost from local parts store was about $9.
duct tape. use this to cover off one side. cover the bolt hole on the exposed side.
stick the nose of the tube down towards the bottom of one side of the rubber. as you fill, pull up slowly until you reach the top. you dont want to just fill from the top cuz there will be air pockets.
if your rubber is actually torn from the mount, make sure you move it back to its original position cuz after it cures it will be almost impossible to reposition and wont hold the motor correctly.
let dry at least overnight, preferrably 24hrs or follow manufacturers suggestion.
remove tape from bottom, and you have the option of filling in the pockets. i made both sides flush. touching up doesnt look pretty but who cares. i guess you can sand it down or something.
OPTION 2 - GHETTO
remember the pieces of the bump stops you cut off when installing your springs, you saved them didnt you? or how about those left over prothane bushings? i stuffed them in my rear mount around the stock rubber.
-update: i filled zip lock baggies with the urethane (messy) and stuffed them in the gaps.
-update: i swapped them out with spares and tried the ES inserts. too harsh. this time around i may do the baggies again, or leave some space like the oem mounts do for even more comfort.
RESULTS
less wheel hop/more power to the ground, especially when i stuffed the rear mount (that b*tch is a mother to remove). i can peel out again!
slightly more vibration? possibly. i cant really tell since i did this at the same time i swapped heads and did the valve adjustment which eliminated a lot of the previous vibration. i dont know if my rear mount was torn before the swap either. however, i highly doubt its as stiff as the prothanes. possibly closer to the energy suspension offerings.
UPDATE 06.17.04:
i finally got the motor in without the es inserts but reinforced the main points with a little dab here and there and the car doesnt vibrate anymore, even with the a/c on. i haven’t noticed much wheel hop, but it doesn’t hop and skip violently like it did with the inserts. can’t explain that one… the only difference is i went from a slipping stock clutch to a cm stage 5.
UPDATE 08.11.04:
ive since realized that although the urethane filler holds up well, it doesn’t stick to the motor mount housing, so it may slide if you dont fill it up completely. i tried to follow the contour of the original bushing while adding little fingers in the spaces. not sure what im gonna do next, i really dont want to fill them up completely again…