Compression/ leakdown on engine stand
#1
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Compression/ leakdown on engine stand
I bought a '99 1.8 liter engine a few months ago. It was said to have overheated and needs a head gasket. The engine is complete minus flywheel, starter, balancer, blah blah blah. Its a complete long block, and I can spin it over and watch the valves opening and closing. Sounds ok to me.
It is bolted to an engine stand in my garage and I'd like to do a compression / leakdown test on it. How will I hold the crank still to perform the leakdown? How do I spin the engine over to do a compression test?
Very noobish questions, I know, but I just want to see where this motor is at just for ***** and gigs before I tear it apart.
It is bolted to an engine stand in my garage and I'd like to do a compression / leakdown test on it. How will I hold the crank still to perform the leakdown? How do I spin the engine over to do a compression test?
Very noobish questions, I know, but I just want to see where this motor is at just for ***** and gigs before I tear it apart.
#3
Both test should be preformed with a warmed up engine but results on a cold engine should give you a good idea of it's health.
compression test requires the tranmsission and starter to be attached. then just hot wire power from a battery to the starter. It's easy but the engine would probably need to be removed from the stand.
Leakdown test can be done on the stand. The cylinder should remain closed at TDC during the test. If not just dial down the PSI some. Its just a leakage percentage.
compression test requires the tranmsission and starter to be attached. then just hot wire power from a battery to the starter. It's easy but the engine would probably need to be removed from the stand.
Leakdown test can be done on the stand. The cylinder should remain closed at TDC during the test. If not just dial down the PSI some. Its just a leakage percentage.
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I was thinking impact for the compression test, but with leakdown, the engine needs to be locked in place. I'm thinking with 100psi going against a piston, that gives it enough force to move the car...I wouldn't be able to hold it with a wrench and my arm when its bolted to my stand. Perhaps I can make something that bolts to the crank and it keeps it from spinning?
#10
Then again it may not make that big of a difference and Im just a noob so don't listen to me.
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I've done a simple compression test on a stand. Cranked it by hand, too. You just have to keep turning it over until you get the gauge up. We made a handle to go on a large breaker bar, and spun it like we were trying to start a model A. Believe me, my arms were like lead after that, but we got the readings.
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