70 z28 exhaust ?

Discussion in 'Camaro Questions' started by ralph amitrano, Jan 25, 2021.

  1. Allison Winn

    Allison Winn Member

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    Drive the car more. On initial startup the moist exhaust is condensing inside all the cold steel pipe and muffler. It takes a good bit of driving to get the entire exhaust hot enough to evaporate out all the water.
    And tighten those clamps like you're mad at them for messing up your clean undercarriage.
    Don't switch to those ugly clamps - somebody spent a lot of $ on that factory exhaust system.
     
  2. Z-Life

    Z-Life Nasty Member

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  3. Allison Winn

    Allison Winn Member

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    Those straight band type clamps will not work in this case. That bottom bend on a transverse muffler entry pipe is extremely tight and the curve is right at the muffler. Also, because of the bend, the pipe isn't round at that critical spot. AND the entry pipe is smaller than the o.d. of the muffler pipe. Dont even try it
     
  4. speedfreak2

    speedfreak2 Veteran Member

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    The simple answer is...there's nothing wrong with your exhaust. The exhaust shop just used steel pipe instead of aluminized pipe. The rust you see is a natural occurrence. When these cars came from the factory all they had was a simple pipe clamp...back then they didn't weld the pipe in. The muffler should have a small hole on the ends for water to drain out. I would recommend not welding the entire tube into the muffler unless you have another way to drain the water out. Plus, as others have mentioned...you need to drive the vehicle and make sure it gets fully warmed up.
     
  5. ZsZs

    ZsZs Member

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    The tack on the pipe could be causing the problem. Its not letting the clamp compress evenly around the tailpipe. Try moving the clamp a little closer to the muffler.
     
  6. Jimmlog

    Jimmlog New Member

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    Just an observation, but the clamps are installed too close to the edge of the nipple and maybe one edge of the saddle part of the clamp is actually hitting the pipe instead of the muffler. As ZsZs said the clamps are too close to the weld as well which would interfere with the clamps ability to compress the muffler nipple properly to make a seal. Maybe move them toward the middle of the nipple and retighten. Welding is fine until you need to take something apart. Band clamps are great if you can get them to fit.
     
  7. 70lt1z28

    70lt1z28 Veteran Member Gold Member

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    Th other technique I have used with standard clamps is to tighten the bejeezus out of them, loosen and rotate 180 and retighten. This makes the indent from the u-bolt even all the way around the tube.
     
  8. eagz28

    eagz28 New Member

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  9. eagz28

    eagz28 New Member

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    exactly
     
  10. COPO

    COPO Veteran Member Lifetime Gold Member

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    Make sure you have a 3/32” drain hole on both sides.
    E54A63F4-CED8-46A2-8DA6-851052740F50.jpeg 81957094-DBBD-459B-A7C7-89107BC84A42.jpeg
     
    Last edited: Jan 31, 2021

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