exhaust leak around muffler inlet

[bdtutton]

I have a 1914 Touring car and the exhaust pipe fits loosely into the cast iron muffler inlet and there are no clamps. Most of the exhaust goes through the muffler and it is not loud, but when I am sitting at a light for a while or in really slow traffic the back seat passengers start talking about the fumes coming up through the floorboards. I know it can not be clamped because the car twists a lot when going over uneven terrain. Maybe my exhaust pipe is too short or too small in diameter? Are there different types/sizes of exhaust pipes? How deep should it go into the muffler? Do I just tell my back seat passengers to quit complaining?

Let me know what you think?

[George House]

There’s a very pliable exhaust wrap found at any auto parts store. I’d try to wrap several times around the juncture of the pipe and cast muffler inlet. Maybe secure it with hose clamps. I also think the wrap will somewhat solidify with heat…

[JohnM]

Sealing the inlet will help, but remember the exhaust outlet is just 12 to 14 inches further back and fumes will still linger under the car when it's not moving. Fashioning a tail pipe that extends out behind the car is the best for limiting fumes in the car.

[JTT3]

Great suggestion George, I’ve seen header wrap use not only there but around the exhaust pipe that runs close to the floor boards to prevent burning them or worse.
I would be remiss if I didn’t offer a recommendation of a product that has multiple applications and it really really works so says Hugh Jass a noted authority on the versatility of the product. Modified Bitumen roofing tar may be the ticket, seals leaks, improves gas mileage, regulates cooling efficiency & so much more……wink wink & a nod!

[DHort]

Do you have a mat over your floorboards? IKEA sells one that is easily trimmed and looks period correct.

[RVA23T]

Sealing the inlet will help, but remember the exhaust outlet is just 12 to 14 inches further back and fumes will still linger under the car when it's not moving. Fashioning a tail pipe that extends out behind the car is the best for limiting fumes in the car.

But keep a good distance from your spare tire if mounted on the rear of the vehicle. I wont say where or when, but I have seen a hole in the side wall of the unused new spare tire and tube.

[Dan Hatch]

Easy there John, some of these new guys may not know Mr Jass.
You should be sure to tell them to look him up on this forum to see his real expert advice on the subject of MBRT.

[bdtutton]

I do have a floor mat in the back. I got it from Home Depot for about $10 and it fits well and looks almost like the original. I also have a tailpipe that extends from the back of the muffler. I did think about the header wrap. I think that option would allow the car to flex and the pipe to move in and out and twist as I drive.

[RajoRacer]

Unless you already know, you might remove the muffler to verify just how much pipe is inside the muffler. Unless you go off-roading with your T, I wouldn't be too overly concerned with pipe movement.

[bdtutton]

I occasionally stop and get food with my wife and drive my Model T down through the park and eat by the river. The body sometimes twists pretty far when you get off smooth roads. Overall I have been impressed with the ability of a Model T to handle uneven terrain. I guess they had to design them that way because the roads were almost non-existent when the Model T first came out. I have some header wrap that I can try to create a flexible connection.

[DHort]

I would pass a jar of Vicks Vaporub to the back seat and have them place a little under their noses.

[ModelTWoods]

Another alternative to exhaust wrap, to to expand the end of the pipe going into the muffler, just slightly enough to provide a snug fit in the muffler inlet. Pipe expanders that expand by turning a bolt in the middle of the tool are available, but it you don't want to buy something that you may use only one time, take the exhaust pipe and the muffler to a muffler shop. Their pipe expander can expand your outer pipe diameter, just enough to be a snug fit in the muffler inlet.

[Allan]

I have a different remedy. Find one of those food cans with the corrogated sides. Cut the top off, leaving the heavy edge in place. Then cut the sides down to match the depth of the hole in the front of the muffler. Once you have that done, slit the side and form the piece around the pipe. Cut of the excess and use a light driver on the heavy edge to drive your sleeve into place. This will close the gap, stop the rattles, but still retain the necessary sliding fit between the pipe and muffler.

Hope this helps,
Allan from down under.

[TRDxB2]

Exhaust wrap needs heat to cause it to cure & since your on the muffler end yoy could heat up the tailpipe with a propane torch.
https://exhaustwrap.online/blogs/news/s ... erformance
Step 8: Finishing Touches
Once the exhaust wrap is securely in place, you can use heat-resistant adhesive spray to further seal the wrap if desired. This step is optional but can provide added protection against fraying and moisture.
Step 9: Drying and Curing
Allow the exhaust wrap to dry and cure. Start the vehicle and let it idle for a few minutes to help the wrap adhere and set in place. During this process, some smoke and odor may be emitted as the wrap adjusts to the heat.
https://www.ebay.com/itm/284584282708?_ ... BMoqeOwapk

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Pipe expand-er https://www.ebay.com/itm/303761291335?_ ... R66rzsCqZA

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Alan's Corrugated (soup) Can !!! Think this is the idea & love it
Use his instructions for preparation ++
Cut the can length wise, wrap around the exhaust pipe overlapping ridges to size, stuff into muffler buy leave some out for worm clamp, pack ridges up against muffler (could use high temp RTV to seal in between but nothing to pervent removal later), place clamp around can & up against muffler.
Sound right Allan