88 XJ-S 3.6 engine smoke

[hutch123]

Very smooth easy starter
Problem
Really heavy blue smoke on overun, getting worse.
can the valve seals deteriate so baddly or is there other possibilities ?

[Donquixote]

Valve seals sound like favourite to me...

[m&d autos]

hi its possible valve stem rubbers but heavy blue all the time sound more like piston rings. you have to take head off the engine to change valve stem rubbers i would change the rings at the same time hope this helps

[hutch123]

Many Thanks
The smoke is only on the overun, not all the time. The smoke now is much worse than a few months ago.
Is there any treatment to buy a little time andd get the rest of the summer out of the car before stripping ???

[homer75]

Try a couple of tins of Wynns engine treatment in it - it's amazing stuff and will probably buy you some time until you strip the head.