Best Way to Reattach Muffler?

Discussion in 'Motorized Bicycle General Discussion' started by VaporKing, Jul 18, 2008.

  1. VaporKing

    VaporKing New Member

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    Hi.

    I would like to semi-permanently reattach my muffler to the exhaust manifold.

    The gasket that came with the engine has now turned-into a crumbly jigsaw puzzle.

    I picked-up some Permatex red High-temp gasket maker at the auto store. I'm hoping to use this stuff that bills "Remains Flexible" on the pacakage.

    What originally caused the problem was the exhaust manifold nuts rattled loose on the engine's first "Maiden Voyage" of about 5 miles. My neighbors were all appalled at the noise (one of them is a city council member. Ooops!)

    Well anyways, I have some red locktite, and some blue. I'm reluctant to use the red, because I'm afraid that it won't come-off if I need to re-work the joint (like if the new gasket maker doesn't hold exhaust vibration/compression).

    What should I do for a good, solid, and quiet fix?

    Sincerely,

    VaporKing
    (c)
    and The citizens of St. Paul, MN
     
  2. stude13

    stude13 New Member

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    hi; auto part stores have material you can use. no glue needed. get new nuts and bolts and use blue locktite on them. if you going to get a harley you should get used to parts rattleing lose.
     
  3. VaporKing

    VaporKing New Member

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    Thanks for the response.

    The red high temp gasket maker is not good to use? I'm theorizing that it would be "rubbery", and absorb much of the exhaust compression, and work better than a hard, preformed gasket that always seems to get "baked", like those that come with the engines.

    I was hoping to be careful enough not to let any of the stuff ooze into the inner aspect of the exhaust port, and ruin any of the tuning that is gained from the stock muffler.

    Speaking of tuned mufflers, I saw a funky looking tuned exhaust on a "Kings" You-Tube clip. The video was interesting.

    As far as things rattling-away from Harleys, I hope to cut my teeth with this bike first, before making mistakes with the Harley that would be very expensive.

    So Stude, how many and what kind of motorized bikes have you put-together, if you have time to answer?
    (c)
     
  4. jburr36

    jburr36 Member

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    I think the best thing to do is to try and find a new gasket or at least make one from the right kind of gasket material. The fuel is usually still burning as it exits the exhaust port at a really high temperature. Too hot for the gasket maker I think.

    If you look real closely at my muffler in the attached pic you can see the effect of the heat. I painted it with 1200 degree high temp paint. It's really dull from the motor to where the baffle is then it becomes semigloss for the last inch and a half. I'd say the exhause it about 800+ degrees when it exits the cylinder. Too hot for gasket glue.
     

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  5. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    RTV sealer- even high temp won't work for long. Go to an auto parts store and tell them what you are doing. They will have the right gasket papaer for the exhaust.

    Part of the problem with the exhaust gasket is that it blocks part of the exhaust port.
     
  6. misteright1_99

    misteright1_99 New Member

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    Ask for EGR Valve gasket supposed to work very good.....I dont know the number, but a search here would find the number Im sure........
     
  7. Venice Motor Bikes

    Venice Motor Bikes Custom Builder / Dealer/Los Angeles

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    A heat riser gasket from a old air-cooled Volkwagen will work.
     
  8. Joshua

    Joshua New Member

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    I used the egr gasket paper and it is working just fine. The roll at o'reilly's was $6 and there is enough to make at least 75 gaskets the size you need. I also used it on the carb manifold and it seems to work fine no vapor leaks there.
     
  9. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    Just make sure you match the ports, not the old gasket when making the new one.
     
  10. Power Ryder

    Power Ryder New Member

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    most automotive speed shops have material for header gaskets whitch I have been useing with no problems
     

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