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  1. #1
    Sr. Apprentice
    Join Date
    Jun 2007
    Location
    Lancaster,PA
    Posts
    40

    Default Exhaust leak test

    Does anyone have any ideas on diy, how to test your exhaust system for leaks. I know there is a smoke test that a mechanic can do. is there anything you can do yourself or purchase? Thanks
    2004 GMC Envoy SLT 4.2L auto (100k miles)
    2000 VW Jetta 2.0 5speed (98k miles) wifes car

  2. #2
    Sr. Apprentice
    Join Date
    Jun 2007
    Location
    Lancaster,PA
    Posts
    40

    Default bumping

    Just bumping this up in hopes someone new will have some ideas.
    2004 GMC Envoy SLT 4.2L auto (100k miles)
    2000 VW Jetta 2.0 5speed (98k miles) wifes car

  3. #3
    Jr. Mechanic ibmoses's Avatar
    Join Date
    Mar 2008
    Location
    "Sweet Home Alabama"
    Posts
    147

    Default

    If its just a slight leak it probably gets less noticeable after engine reaches operating temperature...

    What I did with my 70GS455 was jacked it up and put it on stands.
    Then when the engine is cold climb under the vehicle and use your hand to feel around where you think the leak is...

    Just watch for the moving parts or you could get hurt, bad.

    Bert

  4. #4
    Jr. Apprentice tillyb1989's Avatar
    Join Date
    Mar 2008
    Location
    Saxton Pennsylvanika
    Posts
    13

    Default

    hi, i'm new here and a way i've found is by covering the end of your tip with a rag. dont hold it on for too long or the back pressure will cause harm. i do this once in awhile to check my 96 silverado for leaks. works well.
    1996 extended cab Silverado with a rockin little 4.3 and a 1985 Custom Deluxe long bed regular cab with a 305 and a turbo 400 thats getting a complete restoration! Chevrolet: Like A Rock! :sign0014: :great:

  5. #5

    Default Try This

    have a partner hold a rag over the tip....restricting but not stopping exhaust flow. Then get under it with a bug sprayer full of soapy water....of course...only on a cold block/exhaust. -Murph

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