[mrein3]

I bought my truck in 1994. Since the day I got it I've had one or the other alternator bracket to head bolts shear off at random. I tried grade 8 bolts too but remember they are more brittle so they will shear quicker than a 5.

I put a new engine in last summer, finishing in the fall. I didn't drive it much over the winter other than across the lake so it didn't really get tested until this summer. And once again I sheared off a bolt.

I finally took off everything from the front of the engine and started it up. The harmonic balancer doesn't wobble.

Then I put on the crank pulleys. They wobbled around like crazy. Upon closer inspection I realized there were washers spacing out the crank pulley. They were there when I bought the truck so I always re-applied them when I worked on it. This time I took them off and cleaned up the back side of the pulley. There is much less wobble but some is still there.

When I put it all back together I didn't use any spacers behind the alternator bracket and I used grade 5 bolts to attach it.

So far so good.