ok i installed LT's on my 96 trans am and i used felpro 1470 header gasket, and my middle port on my driver side is leaking so i got percys dead soft aluminum and its still leaking , what the hell is going on? will ultra copper gasket silicone work on the felpro or percys? this is pissing me off!!!!

 

What kind of headers?

I always use 1406 fel pro

 

If the Percy's gaskets aren't sealing, you must have a warped header flang.

 

i have pacesetter ceramic coated LT's.... so what do i need to do? or can i use ultra copper on both side of the gasket?

 

I would pull that header back off. pacesettrers are cheap for a reason....the quality control is somewhat low. I think there is something wrong with the flange. Maybe warpes, might have some slag etc. causing it not to seal. Should be simple to find once its off.

I ran into problems with pacesetters and tried the copper on both side, it never worked, never had luck with percys on anything either......Pepboys had some really thinck regular style (paper type) headers gaskets I tried once...they held up a long time under some warped pacesetters

 

hhhhmmm i got them off but not out the car and there is no slag or the heads or header ports arent dirty either

 

put a straight edge on the flange. have the heads been ported? has someone hogged them out so the gasket does not line up?

 

no its never been hogged out before

 

Damn sorry to hear that the gasket didnt work. Have you put a straight edge to the header yet?


Also I know this sounds ghetto, but what about doubling up gaskets? Or maybe just for the middle ports. (take a good gasket and cut off left and right sides leaving bolt holes for middle ports, and stack this part to another full gasket)

If it were me I would (after verifying warped header)
A. have the header exchanged by pacesetter.
B. have a shop mill it till flat.

What would decide is the shipping/turnaround cost for the header with pacesetter.

 

that sucks man sorry to hear about your luck. whatever you find out with the header i would say earls gaskets ftw. Never had any kind of problem with them on my car or the 87

 

yeh dave the gasket didnt work lol, i dont know what to do , i gotta pull the damn header out, and i thought about doubling up the gasket but i have the percys what u got me and a felpro 1407, i am not sure if it will work like that, plus wouldnt that make the header warped even more if i did do that?

 

It would have to be 2 of the felpro style gasket material to work I would guess. I am just chunkin ideas out there. I would pull it out and check it over and correct it or send it back.

You dont want to put off what your going to have to deal with anyways. (it would suck to have to correct for that in the future, or always be fighting a leaking gasket) I hate exhaust leaks, they really screw up performance/fuel economy.

 

you guys might think iam crazy but i use high temp rtv on my headers.
i use just a little around the ports then i bolt up my headers and let them set 24 hours before use . i learned this from racers i know

 

My pacesetter mids flange was worped!!! I had to take them to a machine shop and have them sanded flat with a belt sander. Next set will be Hooker. You pay for what you get. Good luck!!!

 

HEADER PROBLEM SOLVED !!!!!! Yall aint gonna beleive this **** but whenever i did my header install my buddy, who has an air bag truck and did all his suspension work, well i figured he knew what he was doin, well anyways he helped me install my headers and he did the driver side spark plug, well he cross threaded the 2nd spark plug and it barely went it like 1/4 of an inch so all the exhaust was blowing by the spark plug the whole freaking time!!! so i took it out and it wasnt striped out and i put it back in and exhaust leak FIXED !!! WWWOOO HOOOO sorry everyone for yall having to bare with me through this but thanks to everyone !!!