1940 Custom Low Compression

Posted by todd landis On 2014/5/27 14:06:09

Had mixed in on another post, trying again. On my 1940, 356 did a valve job a few months (couple hundred miles) ago. When finished all seemed great. All had just around 100 pounds of pressure, and ran great with no lifter noise. Then noticed some lifter noise the other day. Tried two oil changes with some Rizlone, and have since started it a few times and let in run for quite sometime. To see if any change. None. So did an oil pressure check with a new mechanical gauge, at start around 55 to 60, after long warm up and at idle pressure at around 40. Seems fine. So on to compression check, all now around 65 to 70. Used a second compression gauge to check first, same results.
Engine starts fine and runs pretty smooth. Fresh gas, unless I got a bad batch at gas station?
Any ideas?