1929 tailpipe clamp picture
- Thread starter Ford1930
- Start date
Mike Peters
Well-known member
Bill G
Well-known member
Yeah, and the darn thing squeaks and rattles too.
CC-Mo
Member
Well Bill, mine rattles too. And before reading this, it was on my list of things to do...tighten it up.
So is there anything that can be wrapped around the pipe inside clamp to quiet it down? Anyone found anything successful for this?
Synchro909
Well-known member
I was being driven nuts by the rattle back there so I decided to have a squizz at it early on in my A ownership. It was immediately obvious to me that if it were tight, it wouldn't allow the pipe to move as it expanded and would therefore contribute to the common problem of a bent exhaust manifold.
I used a longer bolt and put a spacer on it to stop the clamp even going close to closing. That left about a 3 mm around the pipe. I taped a layer of cling wrap to the pipe and held it central in the clamp with some pine wedges. I then filled the gap with silicone and let it cure. The silicone easily handles the modest temperatures reached back there but it does get hot enough to destroy the cling wrap. The pipe now slides silently in a sleeve of silicone.
I had to redo it after about 10,000 miles but the redo was no more than another piece of clingwrap (paper will do) and fresh silicone.
I've done that now on all of my As but I'm considering using a more modern "rubber" mount to hang the pipe on so it can move but not bounce about.
Obviously, my cars are drivers, not show cars
ERRR ? Read the first line in the Service Bulletins on p.327 regarding the tail pipe clamp....."To hold the muffler outlet pipe more rigidly and insure a tighter clamp on the pipe".
I've recently had more than enough 'get out & unders' attempting to install a quality 1928 -29 tail pipe clamp on a similar quality muffler. Spreading the clamp with a chisel will get the clamp in place but the instant the chisel is removed the clamp locks onto the tail pipe, NO moving or twisting.
Hopefully your 'experience' will vary ...#%&#$^%
I've recently had more than enough 'get out & unders' attempting to install a quality 1928 -29 tail pipe clamp on a similar quality muffler. Spreading the clamp with a chisel will get the clamp in place but the instant the chisel is removed the clamp locks onto the tail pipe, NO moving or twisting.
Hopefully your 'experience' will vary ...#%&#$^%
I think the tech writer (or whatever they were called back then) had nothing better to do and got it wrong and on top of that I disagree with drilling extra holes in the frame. Common sense concerning metal expanding and contracting with heat IMO invalidates this Service bulletin. Service bulletins should be an improvement and I can't see what this improves other than a little Model A noise. There is too much weight on the long arm of the exhaust pipe and muffler to not cause eventual manifold to tailpipe connection and sagging problems without a rear support of some kind that is flexible not solid. SB Fig. 1139 page 550 indicates to me that tailpipe and manifold problems may be related and neither is really addressed with a suitable long term fix.
John
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rotorwrench
Well-known member
I installed an STC muffler kit on a helicopter that was not originally designed to have anything other then a basic open header on each side. They used flexible piping and standard clamps to hold the muffler to the frame. I ended up purchasing a fiberglass tape like webbing and I used that under both clamps all the way around . It doesn't last forever but it keeps the muffler from chaffing and moving around in the clamps making noises.
Something like this may help with the tail pipe clamp. My Ford 850 tractor has enough joints in the pipe to help with the expansion so it doesn't seem to affect the clamps on it all that much. Of course a tractor is loud enough that you don't really notice any noises all that much.
Something like this may help with the tail pipe clamp. My Ford 850 tractor has enough joints in the pipe to help with the expansion so it doesn't seem to affect the clamps on it all that much. Of course a tractor is loud enough that you don't really notice any noises all that much.
If one was to throw away the Service Bulletins, would the car be restored or just another hamstered hot rod ?
Fifty plus years in the Model A hobby, I realize we grossly over estimate our own abilities while completely underestimate the talent that designed & build these magnificent automobiles.
Wish I could say same for repo parts.
Fifty plus years in the Model A hobby, I realize we grossly over estimate our own abilities while completely underestimate the talent that designed & build these magnificent automobiles.
Wish I could say same for repo parts.