Re: H Compression Loss

Posted by Janicholson on July 05, 2006 at 16:56:22 from (66.173.50.138):

In Reply to: H Compression Loss posted by IndianaRed on July 05, 2006 at 11:43:43:

Every effort you make, no matter how others see it, is an effort of intent. Sense you are not intending to ruin anything, I applaud your effort. Make (using an old sparkplug that fits the engine with the insulator smashed out of it and an air hose fitting brazed in), or buy an adapter to put air pressure in the cylinder. Take the rockers loose on that cylinder and, with it in neutral, put air pressurt in the cylinder. Even 150 psi won't hurt anything, it gets that and way more running. about 50 psi is minimum. Then listen with a 1/4" rubber hose held close to your ear, and the other end searching for the escape of air. Crank case at the oil fill hole, air intake at the carb, exhaust at muffler/pipe/manifold if no muffler. and look in the radiator for bubbles. This leakdown test is a sure way to find a compression leak as bad as you describe.
Also make sure the valves are all the way seated on the cylinder in question, sometimes they get a piece of crud under them and get held open. Lots of air in the intake at the carb, or air at the exhaust. Good luck finding the problem. JimN

Replies:

• Re: H Compression Loss IndianaRed 17:03:31 07/05/06 (1)
  • Re: H Compression Loss Janicholson 17:10:11 07/05/06 (0)

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