Exhaust and manifold bolts for a 54

[Bob W.]

Hi Guys .I have the new 6th edition tech info manual and judging guide.They do not mention anything about what correct markings such as letters or hash markings that are on the bolts for the exhaust and intake manifold.Going to have the car judged at some point .Can anyone help me out.Thanks Bob W

[Troy P.]

Re: Exhaust and manifold bolts for a 54

Circle headmark.

[Troy P.]

Re: Exhaust and manifold bolts for a 54

Sorry, I was thinking of the head bolts. Exhaust headmark is a circle with three legs coming out of it, indicating a high strength bolt of some sort.

[Bob W.]

Re: Exhaust and manifold bolts for a 54

Troy,Thank you very much .Bob Winski

[Joe L.]

Re: Exhaust and manifold bolts for a 54

Hi Guys .I have the new 6th edition tech info manual and judging guide.They do not mention anything about what correct markings such as letters or hash markings that are on the bolts for the exhaust and intake manifold.Going to have the car judged at some point .Can anyone help me out.Thanks Bob W

Bob------


There were at least 3 different bolts/studs used for the intake and exhaust manifold retention to the cylinder head. I expect that each had different headmarkings but I do not know what they were.

Believe it or not, one of the studs, GM #3835487, remains available from GM (although I'd expect the headmarking is different). This stud was released more than 62 years ago and it's still available from GM! Almost unbelievable.

[Bob W.]

Re: Exhaust and manifold bolts for a 54

Thank you Joe for the info.Bob W

[Troy P.]

Re: Exhaust and manifold bolts for a 54

Threaded studs and two different length bolts. I believe that both length bolts have the same headmark.