Originally Posted By moparx

When I was playing with 2.2 turbo cars in the early 90s we would fill the voids in the front mount with black RTV. Cheap, quick, and easy.

If you're worried about release agent residue on the mount you can rough up the openings with a small file.

windshield urethane works well also to fill the voids. i have used this several times. a tube that fits a small caulking gun is only around $22.00 here last time i bought any. [it's been a while though] i always find a use for what is left in the tube after filling the mounts, because the tube doesn't store well in my experience. or, if you have a local glass shop handy, they may squirt the holes closed for you at minimal cost.
beer [/quote]

I used to do that before replacement poly spool inserts were available. It works.

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