<VV> Exhaust Seals

[James Davis]

I use graphite exhaust packing lightly coated with Ultra Copper 
RTV.  No leaks even with headers.  It is probably best to retorque 
the nuts after a couple heat cycles.  When installing the manifold 
logs, make sure you seat them with a big (4 lb) dead blow hammer as 
you torque them down.  With headers, you do a couple chin-ups ;-) on 
the collector as you torque them down.
Jim Davis

At 02:43 PM 4/17/2006, Anil Mittal wrote:

>   I have a 66 140 with a PG transmission. I use the stock exhaust
>manifolds and Clark's Extractors. I took the whole exhaust system off
>the car this weekend to have it Jet Hot coated and noticed that I had
>pretty decent sized leaks at 3 of the 6 seals between the manifolds
>and the exhaust tubes. I had 2 on one head and 1 on the other. The
>seals were partly gone and I could see the tube and manifold stained
>with black where the seals failed. The seals seemed to be made of
>some fairly powdery clay like pinkish substance, they were probably 7
>or 8 years old. What type of seals are reccomended to keep this from
>happening again, graphite or soft aluminum? The aluminum ones seem to
>be reccomended to get headers to seal well but I can't see why they
>can't be used with the stock manifolds. Thanks in advance.
>
>Anil