Smokey 90

Nov 09, 2006 11 Replies

I'd like to investigate the smokeyness of my 90 after the ditch incedent.



It somkes quite a bit of rank white smoke when you first start it up. When the engine is warm its fine. When it does 1st start it runs a tad rough. It sounds like my v8 when the dizzy is wet, missing a bit. (that means that the engine is misfiring, not that there is a bit of it missing! ;) ) once it has warmed up a bit (once round the block) its fine.



What do you recon is causing it? Ive been putting some of that fuel additive s**te in it for the last few tanks, but it seems to have done c*ck all.



Its done a fair few miles since the roll, some motorway, prolly getting on for near 1000 so i though that it would burnt any oil away by now.



Any ideas?



Well done Nige, 200tdi.

White smoke on startup is usually unburnt diesel. Does it smell of diesel? Blue smoke - burning oil - has a very different and distinctive smell.

You could have one or two heater plugs out resulting in unburnt fuel for a short while on the affected cylinder(s).

I'd keep off any fuel additives. They certainly won't aid diagnosis.

Could well be.. Whats the best way to tell if they are working then? Or is it best to replace all 4.

Check if the ends are hot when the relay goes off? though I don't know how hot they get so mind yer fingers don't stick to them.

Other thing is to check for continuity to earth but this would mean unwiring them all.

Though my recollection was that the 200 tdi rarely needed any heating.

Other thing that crosses my mind is air being drawn in to the system , perphas a pin holed pipe or pickup. I seem to recall similar symptoms on our rangie... once the air had been drawn out of the pipe the engine ran fine, because it was only a pin hole it didn't empty the whole pipe... also used to make a difference which way I parked it.. i.e. upbank or downbank as one way didn't draw air in and one did... note we are talking pin hole perforation here not full on hole.

Lee D

"Mark Solesbury" wrote in message news: snipped-for-privacy@mid.individual.net...

Kato is up to the same trick plus while cold he coughs out a cloud on the overrun - which to me says unburn fuel ( not rings he's not blowing any pressure from the oil filler in fact slight vacuum) I'm waiting for some replacement injectors having put new heater plugs in as a precaution.

Derek Kato 200 TDi Disco

On or around Thu, 9 Nov 2006 19:05:30 -0000, "Lee_D" enlightened us thusly:

best way to check glowplugs is to pull 'em out and connect 'em with fat wire to 12V. the tip should get red hot pronto.

Mind, a decent TDi doesn't really need 'em, although it has been a mite chilly recently.

So it looks like injectors then. After talking to someone at work, they recon that they have to be primed and pressurised after replacement.

Is this true?

Are they easy to change?

"Mark Solesbury" wrote in message news: snipped-for-privacy@mid.individual.net...

Done em this morning seems ok so far but a serious cold start tomoro am will tell all.. Pressurised and what ? no mention of that in the LR Workshop Manual needless to say I didn't but ask the diesel specialist to be sure. If you are lucky it may only be one or two that are being awkward and its easy peasy to find out which armed with a spanner and a good piece of absorbant cloth. Fire her up and adjust the throttle ( do it the easy way take up the slack with the cable adjuster nut ) for a fast idle- Kato at this point was showing an obvious misfire and smoking like Lily Savage, then pop your cloth around the injector and pipe coupling and slacken off slightly. Doesn't need to come right off- the cloth is there cos it will spit! check it is doing. If its a good one the engine will falter slightly try the others until you find the ones (fingers crossed one ) that don't affect the revs which will be the one(s) to take out and run to your diesel guy for refettling I was quoted £27 each which I reckon is quite a decent price.When you put them back in make sure the hole is clean put new copper washers (about 4 for a quid plus vat ) on with the concave side toward the injector WSM says use a bit of grease so they stick to the injector to make it easy to slip em in ( I won't tell you what the Haynes book of fun says lol ) nip up the collar etc etc You might want to get some of the thin overflow piping to replace the old stuff as it tends to perish and will happily drip your precious diesel away unseen after being disturbed. One other thing after you have replaced them don't panic there will be accumulated crud still there so its likely to smoke for a bit a good run to clear it out isnt a bad idea and hopefully Robert is your fathers brother.

Derek

easy on the non-turbo so prob easy on yours. hardest bit is fishing the washers out of the bottom of the hole if they decide to stick! (make sure you get new washers when you get the injectors done)

you can bleed/prime them by just leaving the connectors on them loose then cranking the engine and tightening them up finally while doing so.

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