Exhaust manifold bolts -1?

Onehit

New member
Oct 3, 2018
11
11
3
Old Bridge, NJ
#1
I finally decided to change the passenger side exhaust manifold gasket out cuz it blew out in the back. I had an extra one laying around and of course the center boIt broke off. I tried to get the bolt out but no good its such an awkward spot to work at so I put it back with just the 4 and it's sealed up quiet again. anybody ever run without one of the bolts? I figured if it blows out again it's only five bucks to replace the gaskets and I really don't want to pull this head off to get that bolt out. 1015181435a.jpg
 
Last edited:
Oct 5, 2018
42
23
8
NY
#2
Big vise grips and a torch should get it out
 

Onehit

New member
Oct 3, 2018
11
11
3
Old Bridge, NJ
#3
I wish...it sheared right at the head, there's nothing to grab. I tried walking it out with a punch but it just sheared more of it off. It would need to be drilled out.
 

Onehit

New member
Oct 3, 2018
11
11
3
Old Bridge, NJ
#5
I guess we'll find out how it works with manifolds. I didn't realize how loud it was until it was fixed....well kinda
 

Rktpwrd

New member
Oct 4, 2018
11
10
3
Calgary Alberta Canada
#6
Its not on my Olds engine, but on my SBC, I’m running 1st gen manifolds with Vortec heads. There’s one bolt per side for the manifolds that doesn’t have a corresponding head bolt hole. I’ve had no issues with blowing out exhaust manifold gaskets or leaking with these bolts missing, so I think you’ll be fine.

Alternatively you could remove the manifold, and if you have access to a welder, weld a new nut on top of the broken stud. This would give you the leverage to remove it, and the heat it generates might help break it free as well.
 
Oct 3, 2018
54
28
18
Braceville Ohio
#7
Imo, you'll have to remove the head to fix it. I've had luck with placing a flat STEEL (non coated) washer then a 6 point STEEL nut. Weld thru the hole.