Header flange warped .070 OK?
Thread Starter
Melting Slicks
Joined: Mar 2001
Posts: 2,369
Likes: 51
From: New Milford CT
Header flange warped .070 OK?
My brand new headers' flange is warped into a .070 concave dish towards the head mounting surface.
The manufacturer says this will be ok and will work fine if I use some orange RTV sealant on the .055 gasket.
Does any one have experience with this?
The manufacturer says this will be ok and will work fine if I use some orange RTV sealant on the .055 gasket.
Does any one have experience with this?
Race Director
Joined: Oct 2002
Posts: 16,477
Likes: 26
From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
Re: Header flange warped .070 OK? (CJS)
I would think it would be ok, in fact, it wouldn't surprise me if it was made that way intentionally.
Header bolts have always been famous for loosening up constantly. Anyone who's had them before on older engines know all about this. The bolts will easily pull the flange in .070" when tightening them, but with this slight tension on them (flattening the flange out), the header will act like a giant lockwasher of sorts and prevent them from loosening up as easy..
I could be way wrong too, but it sounds like a good theory. :D
:cheers:
Header bolts have always been famous for loosening up constantly. Anyone who's had them before on older engines know all about this. The bolts will easily pull the flange in .070" when tightening them, but with this slight tension on them (flattening the flange out), the header will act like a giant lockwasher of sorts and prevent them from loosening up as easy..
I could be way wrong too, but it sounds like a good theory. :D
:cheers:
Le Mans Master
Joined: Apr 2001
Posts: 5,473
Likes: 717
From: Black Forest CO
Re: Header flange warped .070 OK? (CJS)
One of my FLPs was warped more than that in the opposite direction. I just tightened the bolts down in steps and that pulled it up against the head with no problem. I did not use any RTV and they sealed up ok.
Racer
Joined: Feb 2002
Posts: 479
Likes: 1
From: Portland OR
Re: Header flange warped .070 OK? (CJS)
Chris,
Mine were warped also. But like others have said, they flatten out nicely when bolted down at final torque. I used no gasket compound and have no leaks. Enjoy!
Alan :seeya
Mine were warped also. But like others have said, they flatten out nicely when bolted down at final torque. I used no gasket compound and have no leaks. Enjoy!
Alan :seeya
