interesting symptom...

Number 4 glow plug not working - thus no combustion when cold leading to smoke and rough running?

ah but I just put a new set of shiny unipart ones in (very carefully so's not to break them) 2 days ago since which I've been able to start it again without cranking the battery flat first...so I tend to think it's not that, thanks anyhow EMB Steve

I'll try that tomorrow...any idea if copper washers in injector holes are the same size as series ones? Steve

You could try swapping 2 injectors round and see if the problem moves with it? Perhaps one of the injectors just doesnt work very well or too well and is causing your smoke?

While you're at it, test the supply lead to make sure that is low resistance too, or swap one lead round, or something. Right now you don't know if the power supply to the glowplug is dud or not.

Steve Have you checked the CC for pressurisation? unscrew the oil filler with the engine running. If it nearly takes your head off, you probable have a head gasket gone!

Mike

today I took the injector for no.4 out for a look the tip was very wet and crusted with sooty crud which I cleaned off carefully with a fingernail, not having new washer I annealled the old one and reused it. On a test drive its chuffing blueish smoke clouds and feels "not right" but that manifold branch gets hot at the same rate as the rest now. In earlier posts I've said about oil level rising due to long periods cranking to start, solved with new gloplugs, but letting diesel into sump via bores. PDannyD mentioned the poor lubricatingness of oil/diesel mix and hinted at rapid wear of things like valve guides (why them in particular?) Increasing blue in smoke makes me think it may be them. Crankcase pressure is ok and inside of intercooler is not too dirty either, I'm not keen on taking of the head for a look as taking vehicle out of action is quite serious for us so if I/we can come up with other stuff to check first... cheers folks hope you can help me ....more, Steve