OK.
If it runs and burns oil - that should be OK for now. These engines are hardy. As long as the engine is getting oil, it will probably run OK even if the pistons and rings are the wrong size.
When I first got my 29 (at age 16 in 1973) I put in a quart of oil every 40 miles! After college I had the bearings re-babbitted and the rear main seal replaced. After that, I only had to put in a quart every 80-100 miles! Years later when I rebuilt the motor, I realized that the pistons were .030 over sized - it was stamped right on the piston face, and I missed it! I had put new rings in myself as a kid - standard size rings! I also learned that the engine shop had installed the rear main seal improperly. After I installed new correct oversized rings from Hastings and installed the rear main seal correctly, engine oil consumption dropped dramatically. I change the oil every 500 miles - and now do not have to add any between oil changes!
Having said all that, as a kid I drove my old car a lot, even though the engine had many problems (that I could not afford to fix) - it still kept running!
Do not be concerned about the valves not having a Chrysler number on them. There were several companies that made valves. I doubt you can find an original Plymouth Chrysler valve for the engine today.
Good luck at the Father's Day car show!
John
If it runs and burns oil - that should be OK for now. These engines are hardy. As long as the engine is getting oil, it will probably run OK even if the pistons and rings are the wrong size.
When I first got my 29 (at age 16 in 1973) I put in a quart of oil every 40 miles! After college I had the bearings re-babbitted and the rear main seal replaced. After that, I only had to put in a quart every 80-100 miles! Years later when I rebuilt the motor, I realized that the pistons were .030 over sized - it was stamped right on the piston face, and I missed it! I had put new rings in myself as a kid - standard size rings! I also learned that the engine shop had installed the rear main seal improperly. After I installed new correct oversized rings from Hastings and installed the rear main seal correctly, engine oil consumption dropped dramatically. I change the oil every 500 miles - and now do not have to add any between oil changes!
Having said all that, as a kid I drove my old car a lot, even though the engine had many problems (that I could not afford to fix) - it still kept running!
Do not be concerned about the valves not having a Chrysler number on them. There were several companies that made valves. I doubt you can find an original Plymouth Chrysler valve for the engine today.
Good luck at the Father's Day car show!
John