Flanders 46 Report post Posted August 13, 2020 So I blew through my header gasket during the shake-down run. Doh! This gasket came with my JBA shorties. The cyl#1 blew out the bottom, which surely can't help with my EFI learning/tuning! Any recommendations on bolts and a new gasket? And what is the torque on header bolts? I had them all around 25 ft-lbs, so not sure what's going on. Stage8 makes some nice lookin' bolts. But is there a slightly thicker gasket that might work a bit better? Quote Share this post Link to post Share on other sites
fvike 173 Report post Posted August 13, 2020 I've had Percy Seal-4-Good gasket for years. Reuasable, had them on and off a couple of times. The're multilayer aluminum. I think they are now Taylor Cable brand. It carries the same part number, and looks the same as Percy. https://www.summitracing.com/parts/php-66014 I linked the Windsor gasket. Is that a Cleveland gasket you got there? As for torque, usualy you can only work with wrenches, so I go as much as I can without slipping with that 3/8s wrench. Then retorque after a day, and again the next day after that. I've always used ARP bolts. Quote Share this post Link to post Share on other sites
Caseyrhe 650 Report post Posted August 13, 2020 Felpro has a set, have worked for me so far with no leaks, Felpro part number 1442 Quote Share this post Link to post Share on other sites
TexasEd 188 Report post Posted August 13, 2020 Following. I have a JBA shorty header set on my radar to replace my leaking original manifolds. let me know your thoughts on them once you get the gasket fixed. Quote Share this post Link to post Share on other sites
Flanders 46 Report post Posted August 13, 2020 sweet. Thanks for the tips. I scored another JBA manifold gasket locally for free, so will try it first assuming perhaps it was an installation issue (?). If it fails, I really like that soft aluminum one! I've got a windsor, so your summit link is perfect. Locking stage 8 bolts too, just in case. 1 fvike reacted to this Quote Share this post Link to post Share on other sites
barnett468 418 Report post Posted August 17, 2020 remflex gaskets seal irregularities the best, and are burn proof. my friend has percy gaskets on his car and the headers have a thick 1/2" flange and they are leaking. since the burn area is all on the bottom of every cylinder, make sure there is nothing forcing the header outward on the bottom. jba gaskets are only good for the trash can and you couldn't pay me to use one. Quote Share this post Link to post Share on other sites
nymustang1969 22 Report post Posted August 17, 2020 Check the cylinder heads to make sure the header sits flush. When I installed mine there was a small bump on the casting that I had to grind down. My engine was on a stand at the time and was easy to see the problem. Might not be as easy to see with the engine installed. Quote Share this post Link to post Share on other sites
prayers1 153 Report post Posted August 18, 2020 I have Sandersons shorty headers that require RTV. It never sealed for me, so I went to Remflex ceramic header and collector gasket. With the header bolts I’m now using a SS star washer that won’t allow the bolt to back out. Quote Share this post Link to post Share on other sites
