Mud-club
Vehicle & Technical => Discovery => Topic started by: pegleg66 on March 03, 2008, 21:09:02
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got a 200 tdi disco, replaced head gasket, drove home and cambelt went, replaced cambelt, tensioner and idler,also replaced 6 out of the 8 pushrods, which were bent. I've check the timing,all ok there, on tickover it runs smooth, however take it for a drive, it smokes black smoke out of the exhaust, takes a while to reach a speed of about 50mph, the turbo doesn't feel as if its performing quite right and sounds intermittently with a squeal ( not a turbo whistle) also losing oil ( small amount)out of the area around the actuator, not the mushroom top but the bottom of the arm, please help, running out of ideas.
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think there is a return feed from the turbo to the sump in that area, might be worth checking that, as for the noise ?. iff its not boost, turbo brg ?. why is it with landys start 1 job and end up with three more. hope you sort it .. alan..
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Sounds a bit like it's overfuelling. Is the intercooler and piping all ok, not blocked at all?
I'd be putting a boost guage on it and checking the turbo is spinning up.
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top and bottom pipes from the intercooler are replacement parts ( main body pipe is metal with silicon pipe joints) so not collapsing.
also clean out intercooler out with paraffin, dried out completely before refitting
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Boost guage then, see what's happening.
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Many thanks for your ideas, finally got around to looking at my disco, took off whole manifold with turbo attached, well when looked at the cast section of the rear of the turbo there was a hole in it, therefore air mixture all wrong drawing more fuel and puffing out black smoke, just gotta put it all back together now.
thanks again
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why is it with landys start 1 job and end up with three more. hope you sort it .. alan..
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well i have now replaced head gasket, cambelt and manifold part of turbo as it had a hole in it, cleaned out intercooler and plenum chambers with solvent, it's smoking when idling and when you put your foot down a large plume of white to grey plume of smoke comes out of exhaust, was driving not to bad, will idle excellently apart from said smoke but when i just took it for a run again it lost top end power and there is oil around the turbo top oil feed bolt and over the down pipe of the exhaust, i have been running just to get rid of the smoke thinking it was just the solvents that i cleaned the intercooler with. but car has been left idling for an hour and twice been driven till warmed up to no avail. is it the turbo ?????.
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White acrid smoke is retarded timing, sometimes caused by blocked fuel filter.
If the turbo isn't working at all the car should just be lame, no smoke as the fuel pump won't fuel up till it has turbo pressure along the little black pipe
But the oil leak doesn't sound good. check and see if it's dumping oil into the intercooler pipes.
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Piston rings? May have gone before all this started?