Sealing headers to block with RTV? - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 08-23-2004, 09:16 PM Thread Starter
Carpal \'Tunnel
 
knifeboy2's Avatar
 
Join Date: Jul 2002
Location: Macomb, IL
Posts: 2,571
Thanks: 0
Thanked 0 Times in 0 Posts
 
Sealing headers to block with RTV?

Its not quite how it sounds. What I've got are a set of the paper header gaskets that are 1 peice from front to back that I'm installing. In the past with crappier gaskets I've used RTV to help seal and it worked except I didn't do a great job installing the gaskets so I'm redoing them. Should I or should I not put RTV on these before installing them? Will the heat from the engine do what it needs to do to seal these things up? I'm tired of redoing this job.
knifeboy2 is offline  
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 08-23-2004, 09:26 PM
 
Join Date: Sep 1999
Posts: 2,137
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Sealing headers to block with RTV?

Permatex Copper sealant is made for that application ...
Jaffer is offline  
post #3 of (permalink) Old 08-23-2004, 09:52 PM
Keyboard Implanted
 
pontiac58's Avatar
 
Join Date: Jul 2000
Location: southern new jersey
Posts: 2,818
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Sealing headers to block with RTV?

You shouldnt have to seal them with silocone. Make sure your headers are good first off. So headers have that lip around the tube and if that is rusted off a little they will not seal. I forget the name of the gasket company, but they make a really thick spongy feeling header gasket that has sealed every one i have put on as long as the header was good. I have also used with good results manifold gaskets that have the metal on the one side and the paper on the other. No matter what, the headers will leak again. They all do, thats why you will never see headers on my CJ.
pontiac58 is offline  
Sponsored Links
Advertisement
 
post #4 of (permalink) Old 08-24-2004, 06:51 AM
Can't Get Enough
 
ecamp55's Avatar
 
Join Date: Jun 2002
Location: Cottonwood, AZ / Wherever the road takes us
Posts: 1,106
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Sealing headers to block with RTV?

Here's 2 tricks for sealing those pesky gaskets from my old hot rod days.
1. Soak the gaskets in water for awhile, put them on wet and fire up the motor to dry them
2. Spray them good with chrome paint, let dry and install them (I still use this method on my Panhead head gaskets).
ecamp55 is offline  
post #5 of (permalink) Old 08-24-2004, 07:07 AM
Keyboard Implanted
 
Join Date: Sep 1999
Location: Southeast Iowa
Posts: 6,394
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Sealing headers to block with RTV?

[img]images/graemlins/tongue.gif[/img] Permatex is all I've ever used on Shivel-A Vee-Ate exhaust manifolds, and as was mentioned, the heavy stuff at the bottom of an old can of "Okie Chrome" paint is also one of the best gasket sealants imaginable. [img]images/graemlins/crazy.gif[/img]
CJDave is offline  
post #6 of (permalink) Old 08-24-2004, 07:11 AM
Way Outta Control
 
Join Date: Sep 1999
Location: usa
Posts: 10,815
Thanks: 0
Thanked 1 Time in 1 Post
 
Re: Sealing headers to block with RTV?

And -- new bolts, and run a tap down through the holes. Wash out the holes with brake cleaner - let dry.
Lube the threads with anti-sieze, use a torque wrench to tighten them down slowly and evenly. Be fussy to keep them all even as you tighten in small increments.
Uneven torque from old rusty bolts is a major cause of header/exhaust manifold leakage and warping.
RRich is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome