1930 7th Series- 320 engine- low compression issue- help sought...

Posted by tuskman On 2024/4/11 7:54:07

Seeking some advice: I’m looking at buying a 1930 Packard 7th series Standard Eight with the 320 engine. Engine was rebuilt just a few years ago due to combustion pressure moving into the cooling system. Was bored out and sleeved to factory dimensions. Now it won’t start when cold unless the air intake to the carb is blocked. It runs well cold or hot with no noise, no smoke, very smoothly. Once warmed up it starts easily. However, suffers from low compression on every cylinder. (60 psi across the board). Carb and fuel vacuum tank have both been professionally rebuilt recently. Valves have been adjusted. Does anyone have any ideas what is causing the low compression? I assume that is the reason for the hard cold starting. Thanks!