• Hey Guest!
    British Car Forum has been supporting enthusiasts for over 25 years by providing a great place to share our love for British cars. You can support our efforts by upgrading your membership for less than the dues of most car clubs. There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Upgraded members don't see this banner, nor will you see the Google ads that appear on the site.)
Tips
Tips

Header Problem.....

Share this page

G

Guest

Guest
Guest
Offline
I removed my Falcon stainless headers (two piece) in the process of taking my cylinder head off for machine work. I noted that I had a considerable amount of blow-by on one corner of one of the headers. I took it to a local machine shop and they are going to face both headers for me. About 1/32". I don't think anyone makes the perfect header! The cheaper ones you know you will have to shave. But they don't give the Falcons away. I assumed, when first installing them, that the little bit of visible distortion would be taken up by the gasket. Wrong! The header needs to mate up to the head perfectly flat or you will get blow-by. Now I will have to grind my triple intake flange so they are the same level. It never ends.....

Bill

They are going to Jet Hot after the machine shop.
 
If your header mounts the way mine does on the GT6, remember that you'll need to have some (approximately) 1/32" shims to make up the difference when you secure the intake and exhaust to the head.
 
Doug, because I have the aluminum intake from GoodParts and am using the stock cast brackets that bridge between the exhaust and intake flanges, I just thought that slightly cupping the contact surface of the intake flange would allow me to achieve the same result, that is, a fairly level bracket that would get a purchase on both flanges at the same time.

Bill
 
Back
Top