Thread: Discovery 2 different smoke to others

Originally Posted by bsperka

White smoke in a diesel can indicate unburnt fuel. Usually at startup though. No glow plugs as engine is warm so plugs are off. Leaky injector if at idle perhaps? Ie letting too much fuel in that the engine can't burn at idle; not there under throttle as fuel is required. What the fuel usage like? Perhaps try some good injector cleaner (i use fuel cleaner concentrate from cost effective) and see if it stops?

Fuel usage is normal, on 855kms and still above empty.... And the car is running just fine, I'm a bit confused, it's only as the engine warms up, so maybe the oil is too thin that the guy has used? (He did an oil change the day before I picked it up) oil is still very clean,

I also might add the injector seals were done a few days before o got it, also head and rocker cover gaskets (has receipts)

I think on the balance of probabilities the head is cracked allowing diesel into the sump. The previous work before you bought the car may have been an attempt to cure your problem and the crack in the fuel gallery was not picked up.

Nick

But with a cracked head would it not be running funny? Because it starts forts click idles fine etc

Before the apocalyptic scenarios something easy and cheap to replace is the crankcase breather(depression controll) valve LLN100140L cos if it's blocked closed on start-up it can be the root of white smoke too(that's a good move to be replaaced if it's old anyway even if it doesnt cure this particular issue), but if you search "PD engine white smoke" you'll find plenty of info on the web about similar engines like the Td5 so you'll have more ideas

Originally Posted by Duck

But with a cracked head would it not be running funny? Because it starts forts click idles fine etc

Not necessarily and usually not. I think Sierrafery's suggestion makes sense, change the crank case breather and see if there is any improvement. Good luck and I hope I'm wrong.

Any news Duck?

Not really, I've just fitted the new depression valve assembly, dropped the oil, and put thicker stuff in to the right level, tried some injector cleaner in this tank, and still the same unfortunately, sometimes it looks like it's better and then other times it's real bad