Posted 12/12/2024 13:31 (#11006223 - in reply to #11006065) Subject: RE: How to do a compression test and leak down test on Chevy small block quesions.
Milford, IL
Throttle wide open for compression test always. Except diesel engines because air flow is unrestricted. Anything with a throttle butterfly, needs to be open.
Leakdown test matters more on high performance engines with 20 hour piston replacement interval, engines that turn 8k rpm sustained every time they run.