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Thread: leakdown clarification

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  1. 02-25-2008, 04:50 PM #1
    BlueHatch
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    Default leakdown clarification

    i know somebody on here can explain what leakdown is and what are the usual supects for causing it. i just got a comp test on my motor and i have excellent compression but 16% leakdown. can someone help me understand what this is? thx in advance
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  2. 02-25-2008, 05:02 PM #2
    DirtyMechanic
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    Default

    Quote Originally Posted by BlueHatch
    i know somebody on here can explain what leakdown is and what are the usual supects for causing it. i just got a comp test on my motor and i have excellent compression but 16% leakdown. can someone help me understand what this is? thx in advance
    leak down usually refers tothe valve seal. when you do a compression test your usually testing the piston rings and their seal against the cylinder wall... but then again a leakdown can also show a leak around the rings if the valves are good. but all in all leakdown tests topend. compression test is for rings.
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  3. 02-25-2008, 05:11 PM #3
    Batlground
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    Sounds like bad valve seals or guides.

    If they leak oil, your compression will be good(oil in cylinder). but leakdown will be bad.


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  4. 02-25-2008, 05:41 PM #4
    BlueHatch
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    so do you think the best fix would be a valve job?
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  5. 02-25-2008, 06:15 PM #5
    1flysi
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    Did you hear air coming from anywhere? Like out the intake,exaust,the ajoining cylinder,dipstick or radiator?
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  6. 02-25-2008, 06:34 PM #6
    BlueHatch
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    not that i can recall
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  7. 02-25-2008, 06:47 PM #7
    AnclyT
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    take it to vuong's garage


    # is in my sig
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  8. 02-25-2008, 07:08 PM #8
    BlueHatch
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    Quote Originally Posted by AnclyT
    take it to vuong's garage


    # is in my sig
    its already in the shop right now i just didnt ask what it was when he told me thx tho
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