2013 D5 High Oil Consumption
 

Hi folks, I'm experiencing high oil consumption on my 2013 XC70 D5 (99k miles), we're talking 1000-1200ml per 1k miles though it has been measured as wanting 800ml after 500 miles.
I have a used car warranty which runs out next month and I'm using an independent Volvo specialist so we'd like to get sorted ASAP.
My guy says he just doesn't see any excessive oil consumption issues come up on these engines and although it's largely within the Volvo "acceptable amount" there's something not right.
Unfortunately the consumption isn't a warranty claim in itself so we need to be finding the cause, at this stage we don't want to be tearing the engine down in case we find nothing.
The garages master tech is back on Wednesday so we're going to discuss where we go from here.
Just curious as to whether anyone else has had issues? I'm reading a few relating to the earlier D5s but not sure if they'd be applicable to my engine.

Cheers!

Cheapest to check is the inlet air filter, if that is clogged you get underpressure on the crankcase ventilation and more oilvapour sucktion.
But i doubt that that is resposible for that much extra oil consumption.

The other 2 main causes are the turbo bearings or the main engine.
Oil leakage on the turbobearings are checked by disconnecting the air hose of the intercooler or sound damper under the crankcase (lowest point) there is always some condensation/oil there but if its excessive it points to more clearance on the turbo bearings.

Main engine probable causes are worn valve seals ,piston rings
Do a compression test, if the compression is lower than the recommended values. Inject a bit of oil against the cilinder wall (not in the middle of the piston due to the giant pit in the piston head) .
Do a compression test again and if the compression improves , then the piston rings are worn .
If it wont improve its probably the valveseals.

The d5 you have are also prone to cillinder head gasket failure , if there is some oilchannel in the the neighbourhood it can also leak oil there .

I've taken the lower boost hard pipe off and it's pretty clean inside, a small amount of oil in a little puddle but nothing I'd class as unusual for any turbo car.
I don't think my compression tester is up to the job for this for bottom end investigation.
Looks like it's a case of wait until tomorrow for the garage to come back with something :thinking:

Are you sure the crankcase ventilation system is clear and not building up pressure ?
No they are not prone to this problem
OR headgasket failures ... the head gasket is a composite one made up of thin stainless steel sheets .

My oil consumption problem is still on going. Since the previous post, the car went back in to the garage and it was suggested that I had the oil separator changed, this hasn't helped anything.
Today I spent a couple of hours taking things apart (EGR fault showing up now - P1407 EGR flow not detected) and discovered a fair amount of oil between the EGR valve and intake plenum, prior to the throttle plate it's fairly clean. Is there any way oil could get in to the EGR gas?!

Change the PCV valve. Relatively cheap and a DIY job.

Is the PCV valve not the same thing as the oil separator I had changed?

Another wee update, I've been running with a catch tank in the breather system for a few hundred miles. No oil to speak of in the tank but we're still using oil.
It looks more and more like something inside the engine, guessing it'll need to be stripped down at some point.
Oh, and the gearbox valve body needs replaced at some point soon :rolleyes:.