Hemi manifold to exhaust pipe

[dart6]

What are others using to seal the pipe to the header. One of mine is leaking

 

[AR67GTX]

If I applied anything it was probably a thin coat of red, hi-temp RTV. Let cure before starting. I use it instead of gaskets on exhaust manifolds to block on some of my engines - applied sparingly.

 

[Fran Blacker]

Got the clamp on I assume?

 

[dart6]

If I applied anything it was probably a thin coat of red, hi-temp RTV. Let cure before starting. I use it instead of gaskets on exhaust manifolds to block on some of my engines - applied sparingly.

 

[RJRENTON]

FYI.......RED or high temperature RTV MAY work......but the question is: how hot does the joint get?? High temp RTV has a continuous temperature of:
"Red RTV Silicone is a high temperature, high pressure, low odor, non-corrosive gasket sealant for use in a variety of applications that require no sag or shrinkage at continuous temperatures ranging from -80ºF to 500ºF (600ºF intermittently)"......Just my opinion of course.......
BOB RENTON

 

[AR67GTX]

I applied red RTV to the exhaust manifold seal surfaces (thinly) in a 427 Corvette I restored in the early 90s. I removed the manifolds about a month ago to give them a fresh coat of paint because a few oil drips had discolored the finish some. After 30 years the RTV looked like it had been applied the day before. It was red, elastic, adhered, and not in the least fried or burnt. I found a non-Permatex, high temp, red, RTV at O’Riley’s with a rating of almost 700 F and went back with it upon reinstalling them.

 

[mrhemi]

If you can get some, "Master's Metallic Compound" works great. I use it to install all of my exhaust systems. Seals, but will allow easy removal in the future. Masters® Metallic Compound | Oatey