Leakdown test on a cold motor

onesickpantera · 10-03-2006, 12:49 PM

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?

insptech · 10-03-2006, 01:36 PM

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.

Wobble · 10-03-2006, 07:50 PM

most of them are done cold anyway, no one checks a healthy motor.

mrhorsepower1 · 10-05-2006, 12:36 PM

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.

dagah2x · 10-09-2006, 04:56 PM

What would be an acceptable amount of leakdown on a cold 502??

mrhorsepower1 · 10-09-2006, 07:10 PM

Quote:

Originally Posted by dagah2x

What would be an acceptable amount of leakdown on a cold 502??

How many hours are on it?

dagah2x · 10-09-2006, 09:58 PM

Quote:

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?