Re: Exhaust pipe - manifold connection

Posted by Mike Flanagan on January 16, 1998 at 00:26:37

In Reply to: Re: Exhaust pipe - manifold connection
posted by Paul Koncak on January 15, 1998 at 19:32:18

Paul is correct in suggesting that the flange on the muffler header pipe may need enlarged. Once the manifold is sanded and the flange enlarged (if needed) a good practice is as follows.
Using a floor jack under the muffler jack the header pipe up against the exhaust manifold. With a light hammer dolly around the flange conforming it to the exhaust flange. Install the clamp and, while tightening, tap the clamp around it's circumference while tightening intermittently. Start the car and heat every thing up and then tap tap tap again. Bet she don't leak now.... Careful when jacking against the muffler, clearance between the tires and the floor will probably result in damage to the muffler, probably...!
God Speed under 50.
The Model A Fool.
: :
: : Can anyone comment on how to connect the exhaust pipe to the manifold?I have the 2-part ring clamp installed, and it pulls the two parts together nicely, but maybe not air-tight.
: : Should there be a high-temp gasget in there, or a metal sleeve under the clamp? Could an air leak here cause backfiring? If there were a leak (I'm not sure there is), would it blow exhaust out, or suck air in?
: Paul,
: It sounds as if you already have the exhaust pipe clamped to the manifold.If there is no movement at the joint, it possibly is tight enough.My experience has been if the two "mating surfaces are as original", there will be no leaks.If a leak is present, it can be heard if big enough.If it is a small one, small black soot will appear around the area where the exhaust gases come out.It will not suck air in.
: Back to the "mating surfaces".The manifold can have uneven surfaces (wear) caused by a loose exhaust pipe.Generally, it takes years to do it.The problem can be remidied by resurfacing the flange area with a file or grinder.The reproduction exhaust pipes often have a flange that does not have enough surface area where it mates with the manifold. With a dolly and hammer the flange area can be increased to original and thus eliminnate any leaks.Hope this helps.
: Have fun!
: Paul

Follow Ups:
Re: Exhaust pipe - manifold connection scott January 17, 1998 at 08:21:08(0)

E-Mail Comment to Webmaster