I recently acquired a ZB32 barrel and cylinder head which I hope to fit to my iron engined B32. The barrel is in reasonable condition with a STD bore which although probably still serviceable would be best with a 0.5mm overbore.
The head however, although it has no broken fins, has been stored in poor condition for many years. As a result the rockers are seized to the spindles and the spindles are siezed into the head. The biggest problem is going to be freeing the rockers first.
So far it has spent 5 days in a 10% Deox-C solution which, although it dissolved all the external rust, didn't seem to penetrate into the tiny clearance between the rocker bores and the spindles. It has now been in a bath of diesel/acetone mix for a week and even after a fair bit of heat applied to the rockers they still don't want to move. I'll try every day and hope that they move eventually.
If the worst comes to the worst I will cut them out and try to source new spindles and rockers, they are the same as parts as fitted to the B31 and B33. Someone must have these bits lying around somewhere. If I have to cut them I'm sure I will be able to remove the spindle stubs from the head but I'd rather not go there if possible.
Any advice is welcome.