2007 D5 (185)....Excessive Oil Consumption & Soot Filter Ful

[jamie1131]

Originally Posted by diro

Impossible! If you had stuck/jammed piston rings engine would be a no runner

I think you might be wrong here, the oil control rings could be stuck/blocked and not cause too many running problems.

I am very interested in your comment about the cam cover gasket possible allowing oil into the air inlet.

This would fit with symptoms, smoke when accellerating away after an over-run. The vacuum in the inlet could potentially be drawing oil in through the gasket if it is faulty. Valve seals would also lead to a similar problem but I have absolutely no smoke on start up or until the engine reaches operating temperature.

[diro]

I focused on the word "stuck" in the previous comment and tried to imagine literally stuck rings lol I should blame my English, sorry about that if confused somebody
If you mean blocked (for example with carbon build-up) - than the answer would be YES, it can be.

Once I replaced valve lifters to D5 engine and forgot to apply a chemical gasket to the camshaft flange. Oil was everywhere within a minute - on the water pump, timing belt, tensioners etc and floor of course. Just a little tiny gap and you have a problem.

[HiFlyer437]

Well, mine has just thrown up 'Engine System Service Required' along with the emissions light (the orange engine graphic). Going into limp mode on every journey.

[osullivant]

Originally Posted by diro

Impossible! If you had stuck/jammed piston rings engine would be a no runner

I doubt its a PCV system either as it works as a breather for crankcase ventilation. Having PCV system blocked engine oil level goes higher because of the gas pressure in the crankcase. The result - oil leak through the oil filler cap, oil dip stick and also through the seals which is quite common.
5l engine oil consumption in 1000 mile - thats massive.
Likely the problem is top end. Not a turbo or DPF as I thought before. Its just too much consumption.

Compression test would show a fault in the cylinders if there are any. Low compression - not only rings problem. It also can be valves.

A further inspection of the top end and valve/camshafts top cover would be recommended. The top cover has inner gasket all the way round. Gasket failure would allow engine oil get into the chambers through the swirl flaps

My compression testing kit is at the Post office so I can collect it tomorrow....

what is a good reading in terms of compression in a d5 185..

I am interested in the notion of the oil getting past the cam cover gaskett but that would not let oil into the intercooler or cause sludge in the pipework,

yet the catch can caught little or no oil.

I think it is a multitude of issues and the rings will be one of them, which contributes to oil leaks in the gaskett and sending oil to the PCV. it is the only explanation for high amounts of blow-bye ,unless a valve is stuck but this would surely show as lost power, when the dpf is clean the car is a flyer....

My Mitsubishi has been parked up for 3 years after I rebuilt the engine and is now nearly ready for road... what a joy to work on!!!!

tony

[osullivant]

Just did compression test.

See my post under diesel engine section...

what are correct numbers for a 185 d5....

[borys76]

HiFlyer437 Open the oil cap while engine is runing, if there's a vacuum under a camshaft cover the problem will probably be a damaged crankcase breather valve membrane. Normally breather valve (You can find it on the top of the oil separator housing next to oil filter) releases gases from the crankcase to intake mainfold, but prevents against sucking out gases mixed with oil. If there's a hole in the valve, engine draws oil from the crankcase through oil separator to intake mainfold and burns it. If thats the case replacing oil separator cover/crankcase breather valve (in my xc90 d5 185 it was volvo part number 8642424) should solve the problem.

[HiFlyer437]

Originally Posted by borys76

HiFlyer437 Open the oil cap while engine is runing, if there's a vacuum under a camshaft cover the problem will probably be a damaged crankcase breather valve membrane. Normally breather valve (You can find it on the top of the oil separator housing next to oil filter) releases gases from the crankcase to intake mainfold, but prevents against sucking out gases mixed with oil. If there's a hole in the valve, engine draws oil from the crankcase through oil separator to intake mainfold and burns it. If thats the case replacing oil separator cover/crankcase breather valve (in my xc90 d5 185 it was volvo part number 8642424) should solve the problem.

I'll give that a go; thanks.

[HiFlyer437]

Okay. With the engine running and the filler cap removed, there's smoke, but no oil being spat out. When you put a latex glove over the aperture (I'm sure I read that somewhere), it inflates. Which means....

[HiFlyer437]

Originally Posted by JRL

I'm probably going to get roasted for this but the only way to cure this once and for all is to remove the DPF and all software related to it. That is what I have reluctantly had to do.

Three years of trying to get the reason for high oil levels, limp mode, missing/stuttering at low speeds and general crap running have forced me to this point.

My own very experienced mechanic couldn't find a problem. His diagnostics showed nothing related to the DPF.
VIDA gave no fault codes related to the DPF.
A DPF specialist could find no problems.
Volvo hadn't got a clue and suggested it was a faulty injector. I got the very strong impression that they have washed their hands of this issue. There was also no software updates available.
No soot filter full messages or any other messages at all even when in limp mode. It only showed the filter full message once, shortly after I bought the car and having read up on DPF's beforehand I took the car for a run until the message cleared.

I changed the DPF temperature sensor just to see if it would make a difference. It didn't. Faced with changing both pressure sensors and then going down the road of changing parts out at random if that didn't work I took the decision that a 2008 car simply was not worth the expense of trying to fix properly and went with the DPF/software removal route.

My car has been transformed. It is actually a pleasure to drive now.

I was very happy when I bought the car that it had a DPF. Proud of the fact that I was driving an extremely clean diesel. But the three times a year oil changes, the blowing of a hole through the sump (at the end of a 300 mile high speed drive) because of the high oil pressure and the constant fear of blowing the engine because of a runaway led me to this point not to mention the sheer cost of trying to find the problem.

Funnily enough when I left the car off to have the software removed there was another D5 Volvo sitting there about to have the same work done. One of the smaller newer models, not sure which one. It was in permanent limp mode and the owner had gone through the same experience as me. Trying to get it fixed and then resigning himself to the fact that it couldn't be fixed.

Volvo know there is a problem with these cars, not just a physical problem with the DPF and the related parts but with the software as well. My local Volvo dealer was simply not interested mainly I assume because they themselves don't know what the problem is as their diagnostics told them nothing.

When the DPF itself was removed it was incredibly clean. Not surprising as all it ever did was regenerate!

Crikey....four months since I started this thread! Well, no further down the road, other than decided to have the DPF removed and the ECU remapped (a clean of the DPF made no difference). Having it done next week - just wonder how much yours cost JRL? Did you have the EGR blanked as well? Would this be worth doing? Ironically, the car passed its MoT last week so no issues there with no DPF. Well, not until next year...

[CBudd76]

My brother in law has a vw crafter that thing would drink oil I mean 4l every week. It had no oil leak it wasn't blowing any smoke the garage ripped the guts out of the dpf done a dpf delete on the ecu now it does not use a drop of oil.😱