Sometime back we had a rather lengthy thread on here which I started, inquiring about the issue of whether the AJ6 engine has seals on the exhaust valve stems or not. As I have mentioned several times before, Superblue has her “blue smoke” issue briefly upon first start up in the a.m.s (well, most of them). We couldn’t seem to reach a definite consensus on here as to whether the AJ6s have them or not.
I believe I finally have found the definitive answer to the question, and it would explain why they were both yeas and nays on the issue earlier. Per p. 22 of the current hardcopy issue of the Moss Classic Jaguar parts catalogue (a pretty good source for XJS parts, too, btw ), Jag apparently started out with NO exhaust stem seals on the AJ6 engine, but switched over to include them, beginning with engine # 163523.
Query, does anyone know in which MY Jag went to that # engine? Alternatively, where is the engine # located on our AJ6 engines (and hopefully I won’t have to get underneath the car to check it )?