Re: 1941 packard 180

Posted by Owen_Dyneto On 2018/1/30 16:58:48

How about some details on exactly how you did the compression test. For example, were all 8 plugs removed, were both the throttle and choke valves held wide open, did you repeat the test after adding a small amount of oil to each cylinder, did you run at least 3 compression cycles before recording the final compression value?

For an engine that has sat for many years, the compression may (or may not) improve with more running time, so don't jump too quickly to disassembly. The comparison between dry and after adding oil will help indicate if the compression loses are due to rings or valves.