Vehicle & Technical > Defender

smokey 200tdi

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ian_s:
the defender 200tdi in my series has developed a bad smoking habit, but only when cold
this is most evident when you are slowing down gently, ie still slightly on the throttle.
if you come off the throttle completely, the smoke totally disappears, and also the smoke smells of unburnt diesel. i thought it could be warn vavle stems, but that would smell of burning engine oil, and also doesnt explain why the smoke goes when you are totally off the throttle

also the engine has trouble revving when cold, until the turbo spools up and then it revs fine.
as you put your foot down the engine revs up to maybe 1500rpm, then stutters, almost as if its being starved of fuel. eventually the revs rise slowly, you hear the turbo start to suck and the thing shoots up to the rev limiter like normal. while its stuttering it emits a dark grey smoke.

once its warm none of this happens

the engine idles fine, i tried cracking off one injector at a time as i read in other posts, and it made the same difference on each cylinder, but wouldnt rev up with any one cracked off.

can anyone shed some light on this?

zulublue:
Ian, it sounds very similar to mine, see a few threads below, mine has a chipped exhaust valve about 7 mm across, the only difference is the no change when you crack the injector.

Does the exhaust sound like it's popping?

ian_s:
popping? not really
its baffling me that once its warm it runs sweet as anything

zulublue:

--- Quote from: ian_s on January 29, 2009, 12:57:18 ---popping? not really
its baffling me that once its warm it runs sweet as anything

--- End quote ---

So did mine to start, then I think the valve just gave up, do you think the headgasket could be expanding a little when hot and thus plugging the gap, it looks like a head off job anyhow.

ian_s:
i already have the head gasket set ready to go, just not quite got round to doing it yet :)

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