No Compression

Posted by todd landis On 2024/3/2 16:24:26

I have not run into this issue before. For my 1940 Super Eight. Had to let it sit for around three months before tried to start the car. Ran fine for a couple miles, got some gas. Then started to run very rough, but nursed it back home. Had to let it set for a few more weeks. Now cannot get it started. Today got a friend that owns a local garage to assist me as I thought I was missing something obvious. There seems to be spark everywhere and to the plugs. Tried a new set of plugs, just in case that was an issue. Still nothing. Tried some starting fluid, and got just one backfire through the carburetor. Checked compression on one cylinder nothing using a compression checker and the finger test. Then checked three more cylinders, no compression. My friend states that when cranking there is even sound so sounds like all cylinders not compression. He put some oil down one cylinder to see if it makes a difference, did not. Blew some air down a few cylinders and comes out the carburetor. He says letting it sit and some bad fuel has stuck the valves open?
Before I pull the head any thoughts? Thanks very much, as always