Re: No Compression

Posted by TxGoat On 2024/4/5 7:42:28

Running the engine on stale gasoline is what usually leads to stuck valves. A car sitting without running will not have issues with engine valves sticking due to stale gas, but serious fuel system problems are very likely, and running an engine on stale gas can cause problems very quickly. (and the problems may not be evident until the engine is stopped, cooled down, then re-started)

The amount carbon shown in the pictures is not unusual for an engine that is not run regularly on the open road. The exact nature of the carbon may not be normal, however. Burning stale gas can lay down deposits that are more like thick, dried paint than normal carbon deposits.

Packards and other pre-WWII engines in extended storage can have problems with rust on valve stems, especially if they are started and run for a short time, then shut down for extended periods. Engines that have thousands of miles on them are less likely to have this issue than a new engine or newly rebuilt one.