Re: 1940 Packard 1801 won't start

Posted by Owen_Dyneto On 2017/1/12 10:49:04

Correcting the ignition timing will NOT change the compression.

Without going all the way back and re-reading all of this thread, here's my suggestion. (1) For the moment just ignore the ignition timing, it's easily dealt with later. (2) I haven't read that you have determined conclusively that the valve timing if off and that's where I'd start. Check the valve timing; if it's OK then the timing chain hasn't slipped and the reasons for the low compression lie elsewhere. (3) Until you solve the low compression problem, ignition timing is irrelevant because no engine with compressions that low will start under any reasonable conditions.

And lastly, are you certain that your compression test was done correctly with an accurate gauge?