Thread: Failed American made motor mount

Tweet

I picked up a pair of MM from NAPA - and they are from the same manufacturer but a Balkamp part number

The reinforcing was done with 5/16x2" Gr8. Probably should have used the 3/8. Probably when I install the drivers side, I'll do that one with the bigger bolts.


Thanks loads for the help folks

RH motor mount2.jpgRH motor mount1.jpg

A "GOTCHA"

When I first got it back together and looked at the driver's side, couldn't see any failure beginning. I've since run the engine a bit - sigh!!!

The driver's side MM has been modified, painted and I'm just waiting for the engine to cool after setting the timing and idle. Happily, the tools were still littering the work bench

Those 5/16 bolts will be strong enough. I only used 3/8 because I happened to have the right length in that size at the shop. I think you can see how those bolts will keep the rubber from separating now that you did that. Sometimes we have to improve what the manufacturers sell us.

Don

Don, I'm usually of the opinion that big is good, bigger is better. When I do carpentry work, I will use 6-8 nails where 3-4 would work, then before it's nailed, it gets glued then just because I have them, I'll put 2-3 screws in it to make sure.

The pass. side was used for my 'test bed'. I drilled and bolted it back together just to get a feel for how it would look - then did the new ones.

The drivers side went in a lot quicker then the pass., total of about 2 hours with a coffee break, two puppy piddle walks, lunch and a phone call. As long as it was up in the air on jack stands, I cranked the 1/2" settling out of my new front coil over springs and tightened a loose exhaust pipe clamp.

We're the same way, everything we build is as if it is going to be used on a Sherman tank. Dan and I were just watching a car show the other night where two guys were manually picking up and turning over a frame for a 61 Chevy. We laughed because when I took Dan's rpu frame to the powder coaters four guys had trouble carrying it from my trailer into their shop ! At least he never has to worry about frame flex.

Don

Interesting since the original HiPo 289 motor mounts had a through bolt.