Leaderboard

hi usually valve stem seals, did you use genuine jaguar ones, some after market ones are really poor quality could also be the crankcase pcv, it controls the pressure in the crankcase, they stick as they get old and cause the pressure to rise in the engine case and cause oil to be pushed past the piston ring and smoke its on the left side of the engine and is like a round disc this is a common problem on higher miles cars cheers Joe