RRAMctd

I found that I have a broken exhaust bolt on number 6. is this a common problem? Should I be thinking of swapping the exhaust manifold to one of those cool 3 piece ones? Hope there is some of the bolt still sticking out of the block to work with.

CTDinMT

Yeah, good excuse to buy a nice aftermarket manifold. Good luck getting the bolt extracted!

RRAMctd

is this bolt breaking all by itself a common thing. I have heard of exhaust manifolds cracking on cars but the bolt just breaking is wierd to me.

CTDinMT

I wouldn't say the manifolds cracking is "common" on a 5.9, but it does happen. I haven't heard of a bolt breaking tho.

RRAMctd

Thats what I thought. I had never heard or read of it. I told my brother that I thought I had an exhaust leak and he says well the number 6 bolts break. I am like really never heard that. Look under my hood and there is number 6 bolt head dangling from that metal holder clip thing.

0524VHO

never heard of it on cummins, but it happens often on powerstrokes

Stew130

I have a friend with one of the Chevy 454 SS trucks and he continually breaks exhaust manifold fold bolts. He is still trying to find some that won't break.

RRAMctd

Thats pretty crazy. I guess there must be a whole lot of expansion on the manifold and it rips the bolts in 2

BigIron70

I would put a straight edge across manifold check for warpage. If it's warped scrap it and get yourself a new manifold. Lesson learned