Re: 1958 Lark 35

[flathead]

I pulled the thermostat cover after it got hot, still water coming up there. I had the same thought about the head gasket so tried to compression test, now it gets really fun. I pulled the plugs. Tested bottom about 105. Went to test the top, it’s a different size. It seems somebody tapped it, then put a sleeve on the plug. It’s not a helicoil, it’s actually on the plug. I’ve not seen that before. The one thing that I have discovered about the water issue today is there was a piece of rubber(impeller I think) in the T stat housing. I didn’t get a chance to drop the lower unit again and see if I smoked the impeller today or if this piece has been in there and just now worked it’s way out. I know it wasn’t there before. So now I need to figure that out next, then figure out how to get the compression tester into the head. Somehow there has to be a way to adapt the threads so I can test the top cylinder. I don’t really think it’s the head gasket, but would be good to know the compression anyhow. Maybe one of you guys will have an idea for that too? There was no water on the plugs.