Cannot get header to seal!!!
 

Howdy guys,
I've been through 2 gaskets on the passenger side!! right from the start up they putt and leak out the bottom. The second time I did my absolute best to center it and tighten the bolts evenly from inside/out ( I hate that heater core by the way!!!)
any ideas?

Re: Cannot get header to seal!!!
 

Have you tried those copper header gaskets.

Is you exhaust binding up and not allowing the header to set on the head correctly
Posted via Mobile Device

Re: Cannot get header to seal!!!
 

Throw away the gaskets. Get a tube of the black RTV. cleans both well no oil. Put the rtv about an 1/8 " bead all around be liberal. Let it set for 3 or 4 minutes each side and bolt it up. Some even put it on the bolts but doubt it is necessary unless they get loose on you. Also recommend you retorgue them after a short drive or in a week or so. Tryed the gasket thing and this works. Haven't seen it fail yet. Good luck

Re: Cannot get header to seal!!!
 

we use ultra cooper when it sets up you cant pry it off

Re: Cannot get header to seal!!!
 

take a straight edge ands see if the header is flat you might have to resurface the header to make flat. i had one that would not seal and i put on belt sander to make flat.

Re: Cannot get header to seal!!!
 

We also let it set over night prior to driving it anywhere. Make sure it is the hi temp black rtv. Was told this trick by some dirt track racers.

Re: Cannot get header to seal!!!
 

Iave always had good luck with paper gaskets. Soak them in water overnight and install them wet. As soon as you getthem torqued, take the truck for a drive and get it up to operating temperature. The heat will dry the gaskets quickly and help them seal.

Re: Cannot get header to seal!!!
 

use 2 gaskets

Re: Cannot get header to seal!!!
 

You tell that heater core who's boss brother....:lol:

Seriously though...is the header unbolted from the collector? it can put a little bit of a twist on the header making it not seat properly, not much! but thats all it takes. Just a thought.

Re: Cannot get header to seal!!!
 

Set of these bolts might help to so they don't back out
Posted via Mobile Device

Re: Cannot get header to seal!!!
 

Remflex gaskets. They work great no trick to putting them on and comes right apart when you need it to.:gmc2:
Posted via Mobile Device
Posted via Mobile Device
Posted via Mobile Device

Re: Cannot get header to seal!!!
 

I use copper gaskets top and bottom and not leaks..