Fullpower

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 ?

RDF1

25# turbo is a baby haha.

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

RedXray

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

arthursc2

iTrader: (5)

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

shakenfake

I think it is the grade bolt GM uses.

arthursc2

iTrader: (5)

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

shakenfake

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

smokeshow

iTrader: (16)

Yeah, use studs. lol

swathdiver

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

RedXray

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