Trying To Avoid 1.6HDI Turbo Failure

[Bob L'eponge]

I have never said that the EGR gasses get into the engine oil.

OK, good to see some consensus on this point. And I never said that you had argued otherwise. Look to my first post on this topic where I was responding to the following:

EGR blanking, I found out about with a few searches on the subject. The valve puts soot from the exhaust back into the engine oil.

I said the EGR gases cause a build up of gunge in the inlet manifold to which you dissagreed.

Not quite, what I was arguing is that the amount of oil being fed into the inlet manifold is also important, and that such a build up of 'gunge' is more likely to be a problem on an engine with excessive blow-by due to engine wear, oil leaking from the turbo and so forth, as this oil will then be carbonised by the recycled exhaust gas.

Cheers!

[Bob L'eponge]

This seems like a good point to review this thread.

Bottom line seems to be all one needs to do to get a long life from this engine is:

1) Change the oil and filter at half the recommended interval using a fully synthetic, low SAPS oil such as Total Ineo ECS.

(Also, drain the oil fully, checking that the drilling through the sump drain plug boss is not blocked and sucking out the oil that collects in the filter housing and so forth. It would also make sense to keep the level topped up close to the maximum level, so the engine has the maximum possible volume of oil to run on.)

2) Check the injector securing nuts periodically, using a torque wrench set to perhaps 9 - 10 ftlb. More thoughts on this issue here:

http://www.frenchcarforum.co.uk/forum/v ... =3&t=43505" onclick="window.open(this.href);return false;

3) Give the turbo a chance to spin down before turning the engine off.

Otherwise, just keep the FAP system running correctly and don't bother trying to by-pass the EGR valve. Don't worry, it doesn't put soot into the oil.

[Peter.N.]

The oil in the inlet manifold can't come from the turbo as its downstream of the EGR.

Peter

Not sure what you mean here. Surely, oil from the turbo does reach the inlet manifold where, as part of the inlet charge, it is introduced to the recycled exhaust gas, which itself reaches the inlet manifold via a separate circuit controlled by the EGR valve?

I would agree that deposits in the EGR itself can't come from the turbo.

As I see it the only input to the EGR valve is recycled exhaust which won't contain any wet oil, and air from the filter, that will contain oil mist from the breather system - unless I've missed something.

Peter

[Axa]

>>>
... don't bother trying to by-pass the EGR valve. Don't worry, it doesn't put soot into the oil.

The buildup of soot in the manifold and inlets in my 1,6 made one inletvalve get stuck open on idle. Blocking the ERG is tid only way to be sure to avoid that problem.


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[Stickyfinger]

Quick Q.....does blocking the EGR valve throw a fault in C5's ? (after all EVERYTHING else bl@@dy does !)

[Northern_Mike]

Not in my MK1 2.0 8v it doesn't. Well, I just pulled off the vac line and plugged it.

Car actually runs better with it working and is a bit more economical.

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[Axa]

Nothing extraordinary happened after blocking. But a few weeks after the electrical system have started to go completely dead a few minutes after the ignition is turned of. And the ride hight adjustment goes to the max 40km /h level. But I guess that is caused by a faulty fuse that I have failed to find. Should post another thread about that.. :*)

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[Bob L'eponge]

The buildup of soot in the manifold and inlets in my 1,6 made one inletvalve get stuck open on idle. Blocking the ERG is tid only way to be sure to avoid that problem.

Clearly, some do have a problem with deposits building up, perhaps because of the sort of driving they do, or because excessive oil is being dumped into the inlet manifold where it reacts with the recycled exhaust gas. On the other hand others, myself included, have never found this to be an issue. Whatever, I don't see bypassing the EGR system as being a solution, given that doing this would transform the car into a mini nitrogen oxide factory that cannot be legally driven on the road! This is a particularly big problem for a diesel engine that, air intake wise, is always running on 'full throttle' and so runs with an excess of oxygen.

If the build up of deposits is a problem, it it such a big deal just to clean them out occasionally? After all, it is not that long since the days when people saw a full engine strip down and 'decoke' as being just another part of car maintenance!

[Axa]

The buildup of soot in the manifold and inlets in my 1,6 made one inletvalve get stuck open on idle. Blocking the ERG is tid only way to be sure to avoid that problem.

>>>>>>>

If the build up of deposits is a problem, it it such a big deal just to clean them out occasionally? After all, it is not that long since the days when people saw a full engine strip down and 'decoke' as being just another part of car maintenance!

I dont dare to guess the costs here in Norway for lifting the top to clean out the engine. I guess its one of those messy jobs most garages is not to keen to do. And unfortunately I dont have time to do it myself.
Blanking the erg took me about 1h including cutting out the blankingplate from some scrap metal.



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[falling-out-with-my-car]

I did a lot of researtch recently whilst looking for a replacement for my broken camshaft Xantia
Knowing I would have to entertain an HDi I read heaps of info about this problem with 1.6Hdi's and decided it just wasnt worth the extra stress for a little bit more milage. fortunately I am having the xantia rebuilt.

[uncle buck]

@ falling-out-with-my-car

Wise move....



Cheers.

[Peter.N.]

I did a lot of researtch recently whilst looking for a replacement for my broken camshaft Xantia
Knowing I would have to entertain an HDi I read heaps of info about this problem with 1.6Hdi's and decided it just wasnt worth the extra stress for a little bit more milage. fortunately I am having the xantia rebuilt.

You won't go wrong with the 2.0. 8 valve Hdi, I have two, both around 200,000 miles and pretty well all original. Its a much simpler end easier to work on engine than the 16 valves, no DPF for a start.

Peter

[Axa]

The buildup of soot in the manifold and inlets in my 1,6 made one inletvalve get stuck open on idle. Blocking the ERG is tid only way to be sure to avoid that problem.

>>>>>>>

If the build up of deposits is a problem, it it such a big deal just to clean them out occasionally? After all, it is not that long since the days when people saw a full engine strip down and 'decoke' as being just another part of car maintenance!

I dont dare to guess the costs here in Norway for lifting the top to clean out the engine. I guess its one of those messy jobs most garages is not to keen to do. And unfortunately I dont have time to do it myself.
Blanking the erg took me about 1h including cutting out the blankingplate from some scrap metal.



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I have now also droped the sump and pushed the recessed drainingplug down, so all dirty oil will go out. Will do the same on my mothers 1,6hdi Focus as soon as i get time. Wonder what stupid idiot did think when constructing the sump???

[Bob L'eponge]

I have now also droped the sump and pushed the recessed drainingplug down, so all dirty oil will go out. Will do the same on my mothers 1,6hdi Focus as soon as i get time. Wonder what stupid idiot did think when constructing the sump???

On my 2009 1.6 Hdi 'X7' C5 the boss that takes the sump plug has a hole drilled through it so that the sump can drain fully. Its not that big and could easily be missed what with all the dirty oil floating around, but I would be surprised if all 1.6 Hdi motors did not have this hole. I always check it is clear with a piece of wire when I do an oil change as it looks like it could be easily blocked.

Going by the amount needed to top the oil up after a change, I am sure that I am getting almost all of the old oil out, but I do use a syringe to empty the oil filter housing and so forth as well.

[uncle buck]

I have now also droped the sump and pushed the recessed drainingplug down, so all dirty oil will go out. Will do the same on my mothers 1,6hdi Focus as soon as i get time. Wonder what stupid idiot did think when constructing the sump???

How did you push the dome down....did you have to heat it?
That's got to be a help in getting all of the old oil out.

I agree, the sump is a very bad design and the M10 drain bolt doesn't help either, would have been better if it was a bigger drain hole.



Cheers.