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

[jamie1131]

Did you manage to have a go at changing the PCV?
I'm about to pick up the phone and book the car into a garage. It's gone from 2 litres for 1100 miles to 2 litres for 500 miles...

There seem to be a lot of people suffering similar problems at the moment. I wonder if there is a problem with these engines at higher mileages.

[HiFlyer437]

Likewise. The garage I used last time found nothing. Guess I need to try another...I'm toying with using the main dealer (£££) as they have serviced the car from new, bar the last service which was done by a local indie.

[poiuytre111]

I do not share your faith in main dealers. If you are reconciled to spending some £££ then find a good specialist, even if you have to travel a bit. When I had dpf problems with my bmw I used a specialist who routinely sorts such problems while running the car under power on his rolling road, for example.

[HiFlyer437]

I did - Formula Cars in Wellington. They told me they could find nothing particular at fault. Happy for someone to recommend another here in the southwest.

[poiuytre111]

Well I would look for someone who can test the car under load on a rolling road dynamometer - perhaps a tuning firm with experience of Volvo diesels.

[osullivant]

Originally Posted by jamie1131

Did you manage to have a go at changing the PCV?
I'm about to pick up the phone and book the car into a garage. It's gone from 2 litres for 1100 miles to 2 litres for 500 miles...

There seem to be a lot of people suffering similar problems at the moment. I wonder if there is a problem with these engines at higher mileages.

Lost all interest in it at the moment,

I put a catch can in the circuit between the oil separator and the pcv connection to the air intake, it did not collect anything,??

on Sunday oil warning came on, followed by soot filter full so that was 5l after less than 1000 miles.

just put my mothers car on the road instead,

I have a compression testing kit on the way from Amazon and I am going to do a compression test first, as this will tell me if the engine is chucked....needs rings etc... if that shows no fault then It must be PCV but there is so much smoke out of the filler and dip stick I am expecting it to be bad piston rings...

[poiuytre111]

Just a thought but before you give up all hope... if it is indeed piston rings, could they just be jammed/stuck. Back in the day people would suggest dribbling some redex into the bore and leaving it stand to help release the rings. Others may have a better approach.

[jamie1131]

There was another thread in the Diesel engine section where someone had stripped and rebuilt the engine due to excessive oil consumption. He mentioned amongst other things that the oil control rings were blocked.

I might try a can of Seafoam in the oil and pulling the glow plugs out to add some plusgas to the combustion chamber for an overnight soak.

[jamie1131]

http://www.volvoforums.org.uk/showthread.php?t=264198

[diro]

Originally Posted by poiuytre111

Just a thought but before you give up all hope... if it is indeed piston rings, could they just be jammed/stuck. Back in the day people would suggest dribbling some redex into the bore and leaving it stand to help release the rings. Others may have a better approach.

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