Compresion test.
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Compresion test.

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    Senior Member holorinhal's Avatar
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    Default Compresion test.

    Is there any reason that I could'nt perform a compresion test on the stand?
    The trotle body and all the accesories(water pump, ac, power steering,alt)have been removed, but the engine is still sealed up.
    Would like to do a test, before i jerk the intake off and start looking around.

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    Platinum Member BigSteve's Avatar
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    Quote Originally Posted by holorinhal View Post
    Is there any reason that I could'nt perform a compresion test on the stand?
    The trotle body and all the accesories(water pump, ac, power steering,alt)have been removed, but the engine is still sealed up.
    Would like to do a test, before i jerk the intake off and start looking around.
    A leak down test would be easy
    If you ain't the lead dog the view is always the same !

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    Senior Member wagspe208's Avatar
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    Quote Originally Posted by BigSteve View Post
    A leak down test would be easy
    And more useful IMO
    Wags

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    Senior Member holorinhal's Avatar
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    Would a leak down test or a compresion test,for that matter, be accurate , on a cold engine, on the stand ?

    I'm not here for a long time, I'm just here for a good time!
    If your not on the edge.......your taking up too much room......Drive it like you stole it!

    73 KONA Restoration http://www.performanceboats.com//showthread.php?t=10678
    '81 Spectra 20 Facelift http://www.performanceboats.com/user...-facelift.html

    18' Advantage http://www.performanceboats.com/jet-...k-project.html

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    Gone in a Flash! Speed of Heat's Avatar
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    Just throwing this out there for information sake...In the aircraft world in which I come from, we use the leakdown tester all the time for diagnosis of an engines health. Although we do look at the leak down percentages for uniformity amongst all the cylinders, more so the ability to listen for leaking valves through the intake tubes or exh headers as well as air whistling through the crank breather (leaking rings perhaps) makes the leakdown a much more reliable indicator of engine condition. You must be aware that sometimes a poor reading is not always indicative of a failed component. Pieces of carbon can sometime lodge between the valve face and seat giving erroneous readings and to a lesser extent between the rings and cylinder wall. When we see a negative indication, the first thing we do is bump the valves off their seat and a high percentage of the time that clears the problem. If not, then we run the engine up to full temp and then re-evaluate. While not the same as a high revving v8, aircraft engines share some similar operating conditions such as high sustained operating temps, large clearances and contamination due to high lead content fuel. -Your mileage may vary, use at your own risk and now back to regularly scheduled programing
    Remember that the Ark was built by amateurs and the Titanic was built by professionals.

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