Re: 1940 Custom Low Compression

Posted by Owen_Dyneto On 2014/5/28 8:03:34

My best guess as to the compression loss would be failure to check and adjust (if needed) the hydraulic lifter take-up clearance - even more important if the valves were refaced in addition to the seats being resurfaced. If the last person to do a valve job also failed to check the clearance, the cumulative effect of 2 seat/valve refacings could have used up most or all the clearance. Checking the take-up clearance is simple, only a minute or two per valve, and is very important to longevity of the job.