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Header bolts etc.

Jim B

Well-known member
Joined
Feb 26, 2006
Messages
62
Location
Illinois
Corvette
1974 L82 Grey coupe
Hi all,
gonna be installing my headers soon., and I don't want leaks later. Are there certain bolts or gaskets I should use? Any ideas would be great.
Thanks
 

minifridge1138

Well-known member
Joined
Feb 2, 2007
Messages
908
Location
USA
Corvette
1982 Black Fastback
I don't have an answer to your question, but I've got a set of headers to install and I want to know the answer.

Thanks!
 

fine69

Well-known member
Joined
Dec 12, 2004
Messages
975
Location
Maryland / D.C.
Corvette
'69 Convertible Vette; '72 Z28 Camaro Rally Sport
I don't have an answer to your question, but I've got a set of headers to install and I want to know the answer.

Thanks!

I have the Stage 8 locking header bolts with Percy's "dead soft" aluminum header gaskets and collector gaskets. I lightlty sprayed the gaskets with silcone sealer before installing. Then I did a follow-up tightening of the bolts after several times of heating and cooling (about a week after). They've been tight as a drum without any leaks. Also, the gaskets are reusable.

Now, if I could only do something about the darn heat the headers give off! Heat barriers, insulation - forget about it!
 

AKRAY4PLAY

Well-known member
Joined
Oct 14, 2001
Messages
584
Location
Wasilla, Alaska, U.S.A.
Corvette
'77 L-82, black on black. Full mod 406 small block
it depends on what size header tubes you have. 1 5/8 primary tubes, you can run just about any locking bolt and be fine. some 1 3/4 primary headers have the tube so close to the bolt that you can't get a wrench in them must less use the locking bolts. i am running the big tube side pipe headers on mine and normal 6 point header bolts. i can't get anything else to fit. as for gaskets, i have not had good luck with the aluminum or copper gaskets. i can't get the header bolts very tight on a couple bolts. i have had good luck with the MR Gasket and Victor Rhines (spelling) head gasket style gaskets. they are metal core and covered with a dark grey coating. the key is a good gasket and tight bolts. just don't use the paper gaskets that come with the headers, you'll be replacing them inside two weeks. also make sure your header flanges are thick, 3/8 prefered. thin flanges will warp with heat and unload the gasket causing burn-thru. good luck, Brian.
 

fine69

Well-known member
Joined
Dec 12, 2004
Messages
975
Location
Maryland / D.C.
Corvette
'69 Convertible Vette; '72 Z28 Camaro Rally Sport
it depends on what size header tubes you have. 1 5/8 primary tubes, you can run just about any locking bolt and be fine. some 1 3/4 primary headers have the tube so close to the bolt that you can't get a wrench...

Brian makes an excellent point regarding the size of the primary tubes.

The Stage 8 bolt also has a small hexagonal hole in the top that allows you to tighten/loosen with a hex wrench - also great for those tight fitting areas.
 
T

TMPJoe

Guest
Hello guys,

I am new but I run the large tube hookers on my car. I had the same issues because of the size of the primaries. at 1 3/4" they don't allow anything to get onto the bolt to really work that well. What we did was what we do to the race car. Used copper gaskets but RTV'd them heavily. That has worked now for nearly two seasons. But this is custom worked sportsmen iron heads. Not sure I would do that with aluminum.

If you run the 1 5/8 those center locks are awesome. Lots of guys at the local gatherings love them.
 

Jim B

Well-known member
Joined
Feb 26, 2006
Messages
62
Location
Illinois
Corvette
1974 L82 Grey coupe
Thanks for all the comments and help! Got the headers on yesturday, and hope to finish this weekend. All went good so far..... Hope to post pics when done.
Jim
 
T

TMPJoe

Guest
Thanks for all the comments and help! Got the headers on yesturday, and hope to finish this weekend. All went good so far..... Hope to post pics when done.
Jim

happy motoring...tell us about the install and lets hope for no leaking!

i hope to start rehab in 12 days and get released to DRIVE! I so want to take a spin!:w
 

fine69

Well-known member
Joined
Dec 12, 2004
Messages
975
Location
Maryland / D.C.
Corvette
'69 Convertible Vette; '72 Z28 Camaro Rally Sport
happy motoring...tell us about the install and lets hope for no leaking!

i hope to start rehab in 12 days and get released to DRIVE! I so want to take a spin!:w

Rehab? RU okay?
 

Jim B

Well-known member
Joined
Feb 26, 2006
Messages
62
Location
Illinois
Corvette
1974 L82 Grey coupe
Got my headers and new exhaust finised Thur. Here's a pic . Thanks for the help. It turned out good!
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4qzvdjr.jpg
 

black_81_vette

Well-known member
Joined
Dec 1, 2002
Messages
295
Location
wisconsin
Corvette
black 81 corvette 4-speed
Very Nice! I used the Mr Gasket ultra header gaskets and after 5 years no leaks!
 
T

TMPJoe

Guest
nice job

fine69.. i had achilles tendon surgery to remove a bone spur..


Wednesday I hit the doctors office and then rehab to start learning to walk again..:beer
 

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