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Leakdown test on a cold motor

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Old 10-03-2006, 11:49 AM
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Default Leakdown test on a cold motor

Can I do a leakdown test on a cold motor? The motor is out of the boat and I am unable to run it. Do you usually see higher numbers on a cold motor?
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Old 10-03-2006, 12:36 PM
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Default Re: Leakdown test on a cold motor

Yes, leakdown past the rings will be higher, valves about the same. This would still be an indicator if one or two cylinders are markedly different.
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Old 10-03-2006, 06:50 PM
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Default Re: Leakdown test on a cold motor

most of them are done cold anyway, no one checks a healthy motor.
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Old 10-05-2006, 11:36 AM
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Default Re: Leakdown test on a cold motor

A cold leak down test on an engine that has been running is fine. Percentage of leakage will be higher. If the engine has set some time it is a good idea to warm the engine up to free up an crystaliztion on valve seats and such.
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Old 10-09-2006, 03:56 PM
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Default Re: Leakdown test on a cold motor

What would be an acceptable amount of leakdown on a cold 502??
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Old 10-09-2006, 06:10 PM
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Default Re: Leakdown test on a cold motor

Originally Posted by dagah2x
What would be an acceptable amount of leakdown on a cold 502??
How many hours are on it?
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Old 10-09-2006, 08:58 PM
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Default Re: Leakdown test on a cold motor

Originally Posted by mrhorsepower1
How many hours are on it?
About 100. I guess a better question would be how much difference would you see from a cold motor to a warm motor?
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