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Re: Compression 150, 90, 75, 150 ....question (archive)

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Posted by 02 Maik on June 25, 2001 at 18:07:43:

In Reply to: Compression 150, 90, 75, 150 ....question posted by Warren, Australia on June 25, 2001 at 17:57:23:

Do a leak down test on those two cylinders in question. Be in a quiet area or get a stethascope and listen to the block and the intake and exhaust side and you'll prob hear which side is leaking.. yes it's basically playing doctor with your 02. say ahhhh.. if you've got blown rings you might as well spruce the head up while it's off. if it's just a bent valve or horrible carbon buildup then you might get away with it. hard call. 02's will run on 2 cylinders... but best on 4..

... on a warmed-up open-throttle plugless engine. And besides being a daily driver with no oil loss, according to MacCartney these engines shouldn't work with a compression less than 100 PSI!

After a squirt of oil into the combust' chamber, pressures are 150, 95, 80, 150.

-leaking valves, leaking bores?

-Guess I'm looking at both a head and block rebuild.

-I'm thinking about just a head rebuild but am I wasting my time?


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