"Derek" wrote> Despite the improvement to Kato's 200TDi lump after replacing a dodgy
injector he was still smoking like Lily Savage until warm. So today I
> pulled off the head and replaced the valve guide seals, I should have
> taken photos ! the reason for him dropping a valve stem cap on number 3
> seems to be a very heavily coated valve right up the stem , I don't think
> I've ever seen one with quite as much carbon concretion (btw thats always
> been in petrol engines) the number 2 pot had a quite a bit on 1 and 4
> were just the usual light coating all the cylinders/combustion chambers
> were pretty clean so hopefully thats sorted - torque wrench session > tomorrow.
>
If the valve is heavily coated right up the stem does the valve guide itself need replacing?