smh00n 87 Report post Posted May 22, 2023 My new Patriot clippsters (I think part # H8433-1) are leaking at #8 and possibly #7 (rear cylinders, driver side) It started a while after I installed them. Replaced the gasket but same issue, so possibly the flange is tweaked. Is this a known problem? Yet to pull the down pipes to see if they are placing tension on the headers although I put the system in by hand and it wasn't tight. Heads are Dart Pro 1 alloy that have been slightly ported, but I don't know how far out they have been taken. No other holes are leaking. Quote Share this post Link to post Share on other sites
RPM 1,190 Report post Posted May 22, 2023 No clue on your headers... but on my cheapo Hedmans I cut the thin flange between the ports to get each port to seal. 1 bigmal reacted to this Quote Share this post Link to post Share on other sites
Mach1 Driver 560 Report post Posted May 23, 2023 Huh, good idea Bob, and you can see how they moved in relation to one another. Your engine is entirely too clean. smh00n, lots of people recommend Remflex graphite header gaskets Quote Share this post Link to post Share on other sites
RPM 1,190 Report post Posted May 24, 2023 Clean? Right. If you only knew Terry. 1 Mach1 Driver reacted to this Quote Share this post Link to post Share on other sites
smh00n 87 Report post Posted June 1, 2023 Good advice. I cut all flanges, as there was about 1/16" warp mainly on #7 & #8. Have a slight choof now, I'm hoping as they heat and cycle they will pull in. I've got alloy heads so a bit wary of using a breaker bar to tighten the bolts to bring them in :) 1 Mach1 Driver reacted to this Quote Share this post Link to post Share on other sites
