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Franke · 11-10-2013

Schrade, You might also want to make sure you have a good charge on the battery to do the compression test on all cylinders. Take the tape off the intake ports so that you don't suck any tape into the cylinders.
Like Jerry says 2-3 compression strokes per cylinder should give a good indication of cylinder balance. I go 3- 4 strokes to make sure I've reached max pressure. Watch each stroke to see what pressure you get and compare each cylinder. For example: 1st stroke 50lbs, second stroke 100lbs, 3rd stroke 130lbs etc. Some manuals say that there should be no more than 10% diff between highest and lowest final cylinder readings.

11-10-2013	#209
Franke Join Date: May 2013 Location: Beaver, PA Posts: 515	Re: TOP END REFINISHING Schrade, You might also want to make sure you have a good charge on the battery to do the compression test on all cylinders. Take the tape off the intake ports so that you don't suck any tape into the cylinders. Like Jerry says 2-3 compression strokes per cylinder should give a good indication of cylinder balance. I go 3- 4 strokes to make sure I've reached max pressure. Watch each stroke to see what pressure you get and compare each cylinder. For example: 1st stroke 50lbs, second stroke 100lbs, 3rd stroke 130lbs etc. Some manuals say that there should be no more than 10% diff between highest and lowest final cylinder readings. Last edited by Franke; 11-10-2013 at 10:55 AM.