S4 N/A rebuild..low compression and no start

JL1RX7 · 08-27-2012, 02:07 PM

What kind of compression checker are you using? I have heard that unless you use a rotary specific one you don't get accurate readings. Now whether that would 90 PSIg from rotary one to 80 PSIg to no rotary is a matter of one's opinion. Since the gauge is reading pressure it shouldn't matter what's producing that pressure. Anyway just some food for thought.

Getting strong even pulses seems to be the deciding factor more than not. It could be the seals haven't "set" completely and a little ATF or oil might help them along.

08-27-2012, 02:07 PM	#1
JL1RX7 Rotary Fanatic Join Date: Feb 2008 Location: Front Royal, VA Posts: 487 Rep Power: 18	What kind of compression checker are you using? I have heard that unless you use a rotary specific one you don't get accurate readings. Now whether that would 90 PSIg from rotary one to 80 PSIg to no rotary is a matter of one's opinion. Since the gauge is reading pressure it shouldn't matter what's producing that pressure. Anyway just some food for thought. Getting strong even pulses seems to be the deciding factor more than not. It could be the seals haven't "set" completely and a little ATF or oil might help them along.