Picked up a nice clean Suburban.
4 broken off exhaust bolts.... Two on each side.
WHY ?
What are they made of Pot metal ?
Is it just the cast iron manifold's expansion that does this ?
My other two LS rigs with Gibson stainless shorty headers seem to keep their bolts on......
.
Any particular trick to keeping bolts intact ?

What happens when I hang 25 pounds of TURBOcharger on the passenger side ? Do I need to fabricate an additional support bracket to the engine BLOCK ?

 

25# turbo is a baby haha.

I always use ARP header bolts. Never had one of these break.

 

It's climate change... exhaust bolts first then the polar bears next

 

I brace every turbo and turbo manifold I install. Whether import or LS or somewhere in between. Manifolds always crack at the worst time, like in the middle of Tx2k lol

I don't know what causes LS's to pop mani bolts, but swapping to the "stud" style retention also fixes the problem for me. Had great luck getting them out with a mig welder when they are too flush to grab with vise grips

 

I think it is the grade bolt GM uses.

 

It's not because it's a **** grade. They are 12.9 😂

 

Ah
I believe this isn’t probably manufacture specific though. Probably everyone has this issue. Just the heating and cooling of the bolt

 

Yeah, use studs. lol

 

Dissimilar metals that corrode besides the fact that they heat and expand at different rates. Change them out every 5 years.

 

I'm using the ICT Billet (header) bolts with Zinc plating