muffler to manifold question
 

Hi Folks,

My '30 Tudor had a sagging exhaust manifold at the outlet, meaning that the last exhaust port did not line up. I bought a new manifold and it lined up perfectly, along with the intake and is now installed.

However, when a manifold sags, the end that hooks to the exhaust pipe is not only drooped but twisted forward. The pipe flange lined up perfectly before.

Now, the manifold outlet points directly downward, but the exhaust pipe tilts toward the rear and they do not line up properly.

It appears that I need to do one of two things, either raise the far rear end of the pipe up, but that puts the exhaust end pointing at the rear axle, or actually heat and bend the manifold end of the pipe to line up with the manifold outlet.

Do folks do this? Have you seen this? There is no evidence that the old gents who put the car together 30 years ago had bent the pipe to begin with.

Comments?

Thanks for any and all answers

JackD

Re: muffler to manifold question
 

I just took my muffler down to the local shop and had the flange expanded a little and then used a pipe to bend the front to make it line up with the manifold. Worked great!

Re: muffler to manifold question
 

I did the same for a friend. He didn'thave a torch so we bent it cold. One guy stands on the pipe right before the muffler and another guy pulls on the 4 foot pipe shoved into the exhaust pipe.

Re: muffler to manifold question
 

I didn't have any help so I hooked up the tail pipe to the car and put a jack under the front of the muffler. Then I stood inside the bumper and pulled on a pipe stuck into the exhaust pipe bending it just a little at a time. Took me three or four tries to get it just right.

Re: muffler to manifold question
 

I just replaced my exhaust manifold last weekend and had the same issue as you explained. I unbolted the tailpipe and used a jack towards the end of the muffler and jacked it up to make a solid connection at the manifold. I highly recommend the sleeve from Synders that goes into the exhaust and manifold.....made things easier to line up. After I bolted up the clamp it was easy to bend the tailpipe back down and bolt it back to the frame.

Re: muffler to manifold question
 

Once you get everything lined up and if the block has the recess you could put the rings in place to keep the exhaust manifold in line. Also did you check for flatness across the ports on the manifolds. You may need to have the manifold surfaced if they do not.
http://www.snydersantiqueauto.com/gland-rings-2673

Re: muffler to manifold question
 

I've found that if the pipe aligns well to the manifold, I use the inner alignment pipe, with a nice bead of HIGH temp exhaust sealant inside the flare, let it "set' up awhile, before firing it up. Later, re-tighten the clamp bolts a couple of times.
Bill W.

Re: muffler to manifold question
 

like DAD i use the little insert pipe but without the goop... never had a leak.....

Re: muffler to manifold question
 

Thanks guys. I am lucky enough to have a torch and I just heated it slightly and using a two foot pipe inside, was able to 'adjust' it. I had asked the question originally because I wasn't sure if I had done something wrong but you all gave me the confidence to just bend the pipe.

This was a new manifold and I found that the original manifold and intake DID NOT line up across the ports... why? Because there was about .090" thick rust buildup between the intake /manifold flat where they bolt together. Not sure this intake had been off the manifold for many a year.

But after cleaning everything, and bolting to the new exhaust manifold, the alignment is perfect and all six ports kiss the block at the same time. I got lucky there.

Thanks for all the help. Truly appreciate this site.

JackD

Re: muffler to manifold question
 

Be sure to use the port rings. It helps prevent the manifold sag.

Re: muffler to manifold question
 

I use a fork of an apple tree. Works great.

Re: muffler to manifold question
 

Port rings (gland rings)... just another thing that allows people to give their opinions like oil and antifreeze (and now Air Mazes)

I was advised by some not to use them (one of the big suppliers actually advises against it) but I used them. That's 'cause Henry Ford put 'em in and I had a new manifold so they fit in nicely.

JAckD

Re: muffler to manifold question
 

good move