1123 200a gen breaking mount bolts

[aytrrt]

my 1123 keeps brking out the mounting bolts from the head. I all ready had to drill and helicol 2 of the head bolts and the third just broke....

not sure what I'm doing wrong. looks like all to suports are there. the back suport. there is one prob that keeps comming up the long bolt keeps trying to come loose(all most ready to get out the red locktite)

 

[Mogman]

Welcome to the SS forums!
The only suggestion I have is to use high quality grade 8/10.8 or 12.8 bolts and lock washers, never re-use a bolt that has worked itself loose and locktite certainly would not hurt.

 

[Coug]

Does the rear support bracket go to the exhaust manifold or down to the lower engine block?

The exhaust manifold flange isn't parallel to the mounting face, so when you tighten it down it pulls the stud off center, considerably weakening it. Add a 200 amp alternator to the mix and the stud breaks off at the manifold.

I had that happen a couple times, along with the front bolts breaking off, and went to the rear brace that goes down to the lower block. No more issues since

Sheared generator bracket bolts.

When I first got the truck(m1123, 200 amp generator) the stud on the exhaust that holds the rear generator bracket was sheared, and a couple of the front bolts were loose. It started making noise again, so I checked, and the exhaust stud is sheared again, and at least one of the front bracket...

steelsoldiers.com

 

[aytrrt]

have long suport and the newer mount https://www.hummerpartsguy.com/45A-...ET-SERIAL-NUMBER-196901-AND-ABOVE_c_2914.html

 

[86humv]

rear support circled.

 

[aytrrt]

have long twisted marked #4, is the bracket #3 needed? I do not have that one

 

[Mogman]

have long twisted marked #4, is the bracket #3 needed? I do not have that one

The question is does your bracket bolt to the engine block or the exhaust manifold? they would both look very similar, no you do not need #3

 

[aytrrt]

bolted to the side of the block

 

[Mogman]

bolted to the side of the block

Then you have the updated bracket.