Copper Gaskets leak after Header install?
Thread Starter
On The Tree
Joined: Jun 2009
Posts: 140
Likes: 0
I tried everything. I was afraid I was going to pull the threads out of the head they were so tight. Paper gaskets were an answered prayer. Does anyone have a way to fix the collector hitting the floor, while Im at it?
Not sure about your collector issue, but with paper gaskets you want to make sure and retorque the header bolts after the gaskets have been heat cycled. They will shrink and the bolts may come loose causing another leak which of course can damage the gaskets.
I recommend nothing but Remflex. You can get them from poweraddersolutions. They are a sponsor here. Ive had problems with Summit, Mr. Gasket, Felpro, and Percey's. Remflex are a crush style gasket that mold to the imperfections on your flanges or heads.
Copper gaskets are supposed to do the same thing, however there is only so far they can "mold" before being useless. Besides, he already posted the problem was solved using a paper gasket.
Teching In
Joined: Apr 2010
Posts: 11
Likes: 0
From: Arkansas
Problem solved - but another arises!!! 
ok - I lost the copper gaskets and installed the Mr Gasket PN 5903 and there are no leaks! However, during this project I have deleted the EGR, replaced the opti, new plugs and wires, new o2 sensors and added headers (obviously). Now when I go to start the car it turns over for about 15 seconds before it fires up. Once it starts it idles fine but there is a lag when you go to rev up the engine. Does anyone have any idea what this could be?? LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
ok - I lost the copper gaskets and installed the Mr Gasket PN 5903 and there are no leaks! However, during this project I have deleted the EGR, replaced the opti, new plugs and wires, new o2 sensors and added headers (obviously). Now when I go to start the car it turns over for about 15 seconds before it fires up. Once it starts it idles fine but there is a lag when you go to rev up the engine. Does anyone have any idea what this could be??
Joined: May 2002
Posts: 3,299
Likes: 2
From: windsor, ont. canada - Home of the fastest LT1 6spd.
my experience is no harm using a bit of coper rtv. my parts are large and intrude on the bolts at the edges.... it works for me.
what works for some may not work for others.....
but wtf do i know
as well........ my .02 try schonfelds gaskets! excellent product and reasonably priced.
what works for some may not work for others.....
but wtf do i knowas well........ my .02 try schonfelds gaskets! excellent product and reasonably priced.
