I have a set of MAC mid lengths on my 94 Z. They have been on there for about 2 months. Well the car has always made kind of a clicking noise. but i just assumed that it was the 1.6 roller rockers since they have a reputation for being loud. well i was looking around under my hood the other day and noticed that 4 of my header bolts were compltely gone. Otheres were loose. This was what was causing a lot of the ticking. Well i replaced the bolts and the gaskets. and it still leaking from a primary on the drivers side. I have tightend and re-tightend the bolts but it still leaks. I am using the perforated metal looking gaskets now. Is there anything that will seal better?

Thanks
Shawn

 

I have used the copper Mr Gasket ones with no problem.

Kevin

 

i have hooker long tubes, after i put them on about every other time i drove it i retightened the bolts after about the third or fourth time they dont lossen anymore, but i still check them everyonce and a while. i use the cheap cardboard gasckets that come with the headers and ive never had a leak

 

Headers are always a hit and miss, some fit perfect with no leaks, others well... Your header flange may not be true. As mentioned before, try Mr. Gaskets copper gaskets, but if your flange is bent, that will not help you. A organic type gasket may form to a bend?

 

Try using a good-quality header bolt (ARP, Stage 8) and Percy's dead-soft aluminum gaskets. They are reuseable, and blowout-proof.

 

Where do you pick up the Percy gaskets?

 

I use fel pro gaskets, and smear a thin layer of orange high temp RTV on each side. No leaks here

 

I use percy's gaskets and stage8 bolts with no problems, you can the gaskets from jegs for 39.95.

 

maybe you guys can help me. i have a 95 trans am with hooker shorty headers and i replaced the header gaskets with paper ones and they blew again. so i bought mr gaskets copperseal header gasket (part 7154) and i tried putting it on both ways and my car still has a bad exhaust leak. it seems like it's leaking from the two middle ports on the driver side. could any of you offer some help to me? thanks in advance

 

Percys dead soft aluminum lt1-d port gasket pn from jegs is: 760-66031
I have re-used mine THREE times and they still seal like noneother.

 

be sure you are doing the tightening sequence the right way. Inside out. Start from the middle then torque outwards.

-Omar

 

I used gm replacement a 94 caprice or f-body they are tri-layer metal, D shaped.
Put them on my buddies car too and they didnt blow out in the 6 months they were on there

 

I used the Summit Brand soft copper D-port gaskets, and I have had absolutely no leaks. They are a little cheaper too.