Ok, today I actually made a start on investigating the noisy engine in my Plunger A10. As the engine is only noisy when hot I was fearing that I may not find anything when I stripped it. I took the head and barrel off. Both exhaust valve faces are pale but the primary side one is very white. I think this is because I've been running with tight tappets, (to overcome engine rattle) and the exhaust valves have got too hot. When I took the cylinder barrel off I found this:
The camshaft doesn't look too bad but I guess I'm going to have to strip the whole lump to measure it.
During my recent work, I found the brand new cam followers that I'd bought from one of our normal suppliers had been chewed up. The suppliers said I must have been responsible for the damage. I was all set to argue about this but then I found that I'd put the sump mesh in turned 90° so the pickup was against the mesh. I have to admit that oil shortage probably caused those followers to wear. I bought a set of SRM followers and of course fitted the sump filter correctly.
Now, this! Might this damage be due to the previous oil flow shortage?
Can I have your comments please.