Posted by Sherman in Idaho [72.47.153.61] on Saturday, March 07, 2015 at 12:18:21 :
In Reply to: motor mount question posted by wayneh [69.250.202.50] on Saturday, March 07, 2015 at 11:48:06 :
I didn't know if civilian trucks did or didn't. They don't seem to be available any more, but aren't too hard to fabricate yourself. The rubber can be simulated by using a flat piece (like conveyor belting) with a hole in it, and a cylindrical piece (maybe made from a rubber grommet).
Very often, motor mounts have been replaced with just bolts, or with just bolts and washers with a piece of belting in between. Neither one really works in terms of isolating vibration. The idea with any kind of vibration mount is to make sure there's no metal-to-metal contact between the two sides (the motor and the frame bracket, in this case). A bolt holding two parts together, with a piece of rubber in between, isn't really a vibration isolator at all. You need to make sure vibration can't get from the engine to the frame without having to go through some rubber.
In this case, you need rubber (hose or trimmed grommet, or band-sawed out of belting) around the cylindrical part in your picture to fit the hole in the bracket so that it can't slide sideways against the bracket and make metal-metal contact.
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