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Less then favorable compression test results on 97 tahoe

Discussion in 'The Garage' started by COCHEV, Sep 12, 2004.

  1. COCHEV

    COCHEV 1/2 ton status

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    Tune up day. decided to do cap, rotor, plugs and wires. so i thought i'd check the ol' compression while i was at it. didn't like what i found. test was dry, no oil added.

    oh, specs: 104K on vortec 350

    #1- 150
    #3- 140
    #5- 150+
    #7- 95 /forums/images/graemlins/confused.gif

    #2- 150
    #4- 140+
    #6- 145
    #8- 140

    don't know why #7 is so low. should i worry about it? i can feel it running a little rough and thats why i decided to to the comp. test. how long do you think before that cyl. takes a total dump. could be a valve i guess, i'd have to do a leak down.
     
  2. justhorsinaround

    justhorsinaround 3/4 ton status

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    With that drastic of a difference I'm thinkin you're prolly right on the thoughts of a valve or seal or somethin along those lines.
     
  3. k20

    k20 3/4 ton status

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    possible its a ring on #7, when my tree fiddy was in its death throes I had a couple cyl's really low, the rings were non existant in those cylinders.
     
  4. COCHEV

    COCHEV 1/2 ton status

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    So do i really want to pull the heads off my wifes daily driver to see whats up? /forums/images/graemlins/thinking.gif

    might as well get a lt4 hot cam to put in while i'm at it. /forums/images/graemlins/waytogo.gif
     
  5. 84_Chevy_K10

    84_Chevy_K10 Banned

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    If you do pull the head I'd put a piston in that hole.
     

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