Hi, some time ago I asked a question about my 95 xantia, 1.9td with blueish smoke coming from the exhaust when I accelerate after it has been idling for a while, well I have got another xantia td so I now have a project to play with. I have taken the turbo off and found oil in the compressor side and the shaft binding a little. on the exhaust side the outlet was baked carbon.
From these pictures can anyone definitely say that the turbo oil seal has been leaking? Or are these normal?
With the EGR on, i would say thats quite normal. Thats soot build up, feels like a greasy paste.
Also, some oil in the inlet is quite normal because of the way the breather system works. What isnt normal is the compressor wheel/shaft binding, it should turn very freely.
2020 Peugeot Partner
2017 Fiesta ST
2001 Ford Puma 1.7 VCT
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Hmm, looking at the exhaust side port I don't think it's "normal" though I only have my 1.9TD to compare it to. My turbine was sooty, just a thin film like a tailpipe but I didn't have all that gunge in the exhaust, none whatsoever. I had it all in the intake manifold where the oil mist and EGR soot blended into the goo Gareth mentions. (See my Latest Purchase blog for pics). To have gunge present in the exhaust suggests oil was leaking into it or the EGR was stuck open and the turbo blew it in there?
Yes, I have read it is "normal" for old turbo seals to weep slightly when cold but soon clear up as they heat. Your symptoms indicate it doesn't clear up and as the shaft is binding, I think you've caught it in the nick of time.
If you're going to do a rebuild, feel free to post pics in a blog of the job so we can all benefit, if you like, no pressure, your choice, entirely up to you, whatever you decide... 8)
Many factors come into play, but on a gently driven car, they can get that badly clogged. I would not be overly concerned by that build up as some are worse than others.
The seal on the exhaust side is a common leak point.
I will say that some blue smoke from cold should not be a major worry. Glowplugs need to be working correctly and injectors in good shape, this blue isnt always neat oil in the combustion chamber. Idling for a long period of time, then revving it can often show some blue, but i would monitor oil usage.
My Transit has a puff of blue from a cold start, both with old and new turbo. It doesnt use a drop of oil in 5k though and is a strong performer. Likewise, my old Montego did 100k with me and did the same till warm. I would only look further if blue smoke happened when hot.
2020 Peugeot Partner
2017 Fiesta ST
2001 Ford Puma 1.7 VCT
2006 Ford Fiesta Zetec http://www.facebook.com/kidmans" onclick="window.open(this.href);return false;
The symptoms I had with the car are thus, when the engine was warm and driving along there was no smoke to speak about, but if I then let it idle for a little while, then rev it, I would get a large blueish smoky cloud out of the tail ( and I mean large amount of smoke) but once it had cleared and I drove off it was o/k, I have started cleaning the “gunge” from the exhaust side and it is solid, the exhaust before and after the turbo shows normal soot.
The symptoms you described are more inline with worn valve stem oil seals, which harden with age. If your getting plumes of smoke and more than acceptable oil usage i would lift the head, give it a decoke and new seals, gasket etc. Some oil seepage from the turbo is quite normal, its when it gives a smokescreen you have to worry.
How many miles has the engine done?
2020 Peugeot Partner
2017 Fiesta ST
2001 Ford Puma 1.7 VCT
2006 Ford Fiesta Zetec http://www.facebook.com/kidmans" onclick="window.open(this.href);return false;
it,s had the italian treatment with no change, i,m torn between the valves or the turbo, as this is the first one i,ve taken apart i was surprised at the amount of build up in the exhaust side.
I'll go for worn valve guide seals too but before you whip the head off to replace them...
Another possibility I've seen (albeit on Lucas Injected diesels) is very similar symptoms caused by a split boost overfuelling diaphragm on the pump. It may be worth checking the LDA diaphragm (see MikeT's excellent tutorials) on your pump is not split and allowing oil in the inlet to flow down into the pump and adding oil to the fuel. One side of the LDA diaphragm will always found to be very oily but the opposit side should be bone dry.
A good bit of oil in the inlet tract is entirely normal due, as said, to the way the crankcase breather works.
the mileage is about 75k and oil consumption was very low. i did not have to top it up between services.
So clearly whatever is causing the 'blue' smoke, it's not burning oil (in significant quantities).
I agree that as the turbo should spin freely, something is obviously amiss. As you've started to clean off the crud, it's essential to do a thorough job. Turbos spin at astronomic revs, so any imbalance must be avoided or else the (new) bearings will soon fail.
2012 Subaru Forester - capable but no magic carpet
2011 Grand C4 Picasso VTR+ 1.6HDi - not missed!
1995 Xantia Estate SX 1.9TD in Vert Vega "The Green Lady" - sadly missed
1998 Xantia 2.1 VXD Estate in Mauritius Blue - R.I.P. (terminal tin-worm)
Is there any side to side play at the exhaust or compressor wheels ?
Play should be no more than say 25 thou , any more and the bearings are shot. If either the turbine or compressor wheel has touched the housings the turbo is scrap.
Now using '00 Xantia LX HDI, pov spec
My past Citroens :-
'00 Xantia SX HDI, now dead due to accident
'99 Xantia HDI 110 Exclusive, RIP
'97 Xantia TD SX
'96 Xantia TD LX
'96 ZX TD
'89 BX TD
'88 AX GT
'79 CX2400 Pallas (scrapped )
& a couple of Peugeots !
so I now have a project to play with. I have taken the turbo off and found oil in the compressor side and the shaft binding a little. on the exhaust side the outlet was baked carbon. 
