Just intsalled New headers, can't get them to seal
06-08-2007, 12:19 PM
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Just intsalled New headers, can't get them to seal Hey guys, I just finished doing a butt load of work to my car. I installed a New MSD Pro Billet Opti, Wheel Bearing, Guage Temp sensor, and of coarse a set of off road Pacesetter Headers and ORY. I used copper gaskits for the headers and tightend them as best I could using just wrenches. It is so hard to get to some of the bolts too, so I am not to sure if they need to be tightened more or not. The headers leak on both sides, and both the middle two cylinders. What do you guys think I need to do? I have tried to wrench down on them as best I could, I don't kno if I can give it more or not... I'm going to try anyways
06-08-2007, 01:38 PM
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When I did mine I used a half length wrench (not socket wrench) with the swivel built into it...really cool wrenches. Before that though I tried a long wrench and could only get them so far and just left them....it sounded like crap! I dyno'd it like that and came up with 362.....few weeks later took some time got the small wrenches and tightened them up good- now it sounds great and dyno'd at 382! I have the same headers w/ the copper colored gaskets as well. Good luck.
06-09-2007, 03:42 AM
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had a similar issue with mine, junk the copper header gaskets, copper is great for head gaskets but can be a nightmare for header gaskets, just get a set of mr. gasket ultraseals, the fel pro equivelant the like
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06-09-2007, 03:21 PM
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Percy's dead soft gaskets and 1" stage 8 locking bolts.
I've reused the bolts and gaskets a few times now and they still seal perfectly.
(H/C 93 LT1 with Jethot Hooker LTs)
I've reused the bolts and gaskets a few times now and they still seal perfectly.
(H/C 93 LT1 with Jethot Hooker LTs)
06-11-2007, 10:38 AM
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Originally Posted by Revelation Z28
what does it sound like when they leak??
They sound like leaky manifolds. Only now I have headers. I hope that there isn't anything wrong with the damn things, they were a pain in the *** to put in for me. I would have to say the job was harder than installing a cam into an LS1! But they leak, more so I think on the driver side then the passenger side. If you put you hand close to it you can feel exhaust blowing out of them.
06-11-2007, 10:41 AM
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Originally Posted by borninatransam
ive always ran two felpro's held together with some rtv and havent had a problem. if that doesnt work then the headers are warped or the head is messed up.
Thanks for all your help with this guys I will be trying a few more things, like a new wrench to throw on them before I take drastic measures
06-11-2007, 01:24 PM
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Originally Posted by 1999T/A
I used the stocker MLS gaskets on my pacesetter headers and havent had a leak yet . YOu might wanna try them . YOu have to drill out two holes on the gaskets to get them to work , but thats easy .
06-11-2007, 01:28 PM
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Originally Posted by aboatguy
Another vote for Percy's deadsoft aluminum gaskets!! 
