header leak,stock cj heads,long tube headers

[fryedaddy]

i have long tube headers connected to cast iron 428 cj heads.my headers has 16 bolt holes,both patterns.and the heads have 16 holes,both patterns.question is,to get a good seal,do i need to use either top and bottom pattern,side to side pattern,or try to get all 16 in.and what is the best gaskets to use and to use sealer or not.

[jholmes217]

I like Remflex exhaust gaskets.  They are the crush kind, and so far, I haven't had a leak.  I have Cobra Jet heads, but use the 8 bolt pattern.  I added a hole for the dipstick tube.  http://catalog.remflex.com/

[FirstEliminator]

     About 15 years ago, my daily driver was a 70 Cougar that had a mild 460. A 460 in a 70 Cougar has limited access to header bolts and changing gaskets. Two sets of the foil backed paper gaskets from the local auto parts store had blown out. I decided to try these Percy's Seal-4-Good gaskets. They really work well. I drove the 70 Cougar daily for another 5 years. Now it gets driven occasionally. It still has the same gaskets on it from 15 years ago and they don't leak! I put these on everything. Whether it has manifolds or headers.

   Hopefully this is the bolt pattern you need:
    http://www.summitracing.com/parts/php-66053

    Mark

[fryedaddy]

I like Remflex exhaust gaskets.  They are the crush kind, and so far, I haven't had a leak.  I have Cobra Jet heads, but use the 8 bolt pattern.  I added a hole for the dipstick tube.  http://catalog.remflex.com/

they have the gasket i need,i will give them a try,thanks

[fryedaddy]

     

   Hopefully this is the bolt pattern you need:
    http://www.summitracing.com/parts/php-66053

    Mark

i like the sound of these,but they dont match my heads,thanks for the reply

[jholmes217]

I like Remflex exhaust gaskets.  They are the crush kind, and so far, I haven't had a leak.  I have Cobra Jet heads, but use the 8 bolt pattern.  I added a hole for the dipstick tube.  http://catalog.remflex.com/

they have the gasket i need,i will give them a try,thanks

I think you will like them.  I spoke with them on the phone, and they recommended I use the 8 hole gasket even though I have 16 bolt Cobra Jet heads.  Make sure you order based on the port opening size, and not just the bolt pattern.  I ended up with 390 GT gaskets the 1st time I ordered, and the port size on the gasket didn't match.

[Heo]

I havent used a header gasket since 1988 i just use silicone
no leake since I know hard to belive it works. I did`t belive
It Before i tried

[BruceS]

Lars, specifically what type of silicone do you use?  Were the heads and manifolds surfaced before silicone was applied? 

Thanks,
Bruce

[Heo]

Most times i have used the ordinary orange Form-A-Gasket
sometimes the transparet stuff for aquariums
First time i used it was convinced i had to take it apart when
i got a gasket but held up for years until i swaped Engine
Most of the times i have just gave the manifold and heads
a good scrape down
I still have a hard time believing it my self. But worked
every time even where gaskets dont work

[Phil Brown]

I havent used a header gasket since 1988 i just use silicone
no leake since I know hard to belive it works. I did`t belive
It Before i tried

I do the same thing, Surface the flange flat, Orange hi-temp silicone and as many of the 16 bolts as i can get in
  A good header with a thick flange really helps
                                                                                                     Phil