Hi everyone.
All 4 inlet valves on my 1938 Ruby are stuck.So I took all 8 valves out and cleaned them as it hadn’t been done since the 80’s. The exhaust ones were fine, but I still cleaned them and lapped them in. I put the head back on along with a new gasket, and stared the engine. It started first time, and run lovely. I let the engine run for 10 mins then turned it off. After about 15 mins I decided to start the engine to take the car for a run, but was horribly shocked to find all the compression had completely gone again. And cannot believe it! When I cleaned the valves they were free as they should be…. I cannot understand it. It is only the 4 inlet Valves that are sticking….. Could it be new guides?