The Stovebolt Site Forums The Shop Area Engine Shop Rear engine mounts

On my 58 half ton with a 235 the shop manual calls for a special lock washer for the rear engine mounts that bolt thru the bell housing. One of mine on the passenger side was missing. I thought the bell housing bolt holes were threaded so I thought I threaded the bolts thru. Some how one fell out. When I removed the engine and installed the new engine I do not remember there being locks and nuts on the top side of the bell housing legs. Anyone know what lock washers they are referring to in the shop manual.

They originally come with a lock plate. The tabs fold over the hex on the bolts. I always discard these & use split ring lock washers. There is a tube spacer that goes in the middle of the mounts. If this is missing the mounts won't work right. If the threads in the bell housing are wiped out you put a nut on the top side.

That is what I did. Used a split lock washer, but since I fastened it down with the nuts and lock I can really feel the vibration of the engine now. Some installed a slightly radical camshaft when they rebuilt the engine.

You shouldn't feel any metal to metal type vibration if the motor mounts are installed correctly.

The following list is to confirm you have all of the right parts for the rear mounts. There is an Upper Rubber Mount (U-shaped), a Lower Rubber Mount (small rectangle that fits up inside the cross member), a Spacer, a Lock plate and the Bolt.

The lock plate gives the bolt a larger surface area to press against and locks the bolt from turning. If you just use a split ring lock washer there's not much keeping the bolt from being pulling up through the Lower Rubber Mount when the truck frame twists or there is heavy engine torque.

Mike B

I have everything you described except the lock plate. Can you post a picture?

The pre bent portion fits over the lower rubber and the portion near the bolt head has tabs that are bent up after torqueing. This prevents the bolt from rotating.
These can be found on trucks up into the late 60's +?. Junk yard or DIY.

The bell housing ears are threaded. Someone may also put a nut on to "lock" it that way.

Thanks for the photos. I have everything except the strap with the tangs to lock the bolt head. I will have to make those. There are no junk yards left around here with trucks that old.

I have PM'ed the links.

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