Took my 98XK8 to an independent dealer to check on the noise that sounded like a sticking valve. He checked and determined that the oil pressure was fine, but suspected that the problem wasnot enoughoil volume getting to the engine due to some restriction/build up possibly caused bymy limited driving (50K miles). He said the only way to find out the cause of the problem was to take the engine apart (big bucks), and that the solution would probably be to replace the engine(bigger bucks). His recommendation was to go trade it in. Anybody had a similar problem?What aboutsome oil treatment to try and burn off the restriction? Help?
thanks

 

Thanks for the suggestions. I don't think it's the tensioners as I replaced them last year, & that sound was much more metallic. This definitely sounds like an old Ford I once had when it ran low on oil. I'll check with parts supply for Berryman Chemtool or other ideas.
thanks again.

 

Checker Auto suggested "Valve Medic" oil treatment. I'll give that a try tomorrow & follow up with oil change with heavy oil as you suggested. Thanks