I have been having problems with the engine in my JCB 3C3. It is a Leyland, and in the past I have had to renew the cylinder head gasket every year, but in 2014 someone told me to use wellseal, and till yesterday all was well. Unfortunately it started playing up again yesterday. It seems to be marking the head gasket between pistons 1 and 2 and loosing compression and consequently water. The cylinder bores are fitted with wet liners. Either one or both liners have a seal at the bottom and either one or both may have moved slightly downwards.
Has anyone come across this? Is it possible to get a head gasket that can compensate for that?
I am hoping to get away with a quick fix, rather than take the engine out, as it is rather a big job to remove the liners. It is a Leyland 4 cylinder engine with a flat topped rocker cover.
