|
Diesel Engines A forum dedicated to diesel engines fitted to Volvo cars. See the first post in this forum for a list of the diesel engines. |
Information |
|
Possible cause of DPF Issues with High Oil Consumption.Views : 7326 Replies : 25Users Viewing This Thread : |
|
Thread Tools | Display Modes |
Dec 4th, 2017, 09:02 | #11 | |
Premier Member
Last Online: May 2nd, 2018 08:14
Join Date: Sep 2011
Location: DownSouth
|
Quote:
Low friction rings press on the cylinder walls slightly harder and were introduced to reduce oil consumption when thin 30 grades are used in a diesel, or 20 grades in a petrol job. They are only low friction when used with a high Moly (Mo) full synthetic engine oil, so it's a rather odd description, although they are made using metal coatings that reduce the friction slightly. They don't last as long as older low tension ring if they are German or US OEM standard. If you can't get a new OEM standard turbo fitted, try the following: 1/ Use a major brand full synthic 0 or 5w40 and half a can of Liqui Moly Ceratec every OCI. 2/ Avoid using a big right boot too often. 3/ Make sure the thermostat is working. 4/ Check the crank vent system is working. 5/ When you change the fuel filter, fill up the housing with Liqui Moly Diesel Purge. 6/ When you change the oil & filter, try using a can of major brand oil flush additive that is designed for use at idle (Castrol classic, Liqui Moly or Amsoil all make safe ones) for 10 or 15 mins just before the oil is drained. Using a flush might result in a temporary increase in leak or even oil burn rates due to the false oil seal effect, but it's only temporary as the new oil will sell up the oil seals and gaskets. Make sure you use a real Volvo or German certified OEM standard oil filter (Mann etc), as the far Eastern jobs can use bad relief valves that result in very high oil pressures during cold starts. 7/ If all else fails, move up to Mobil 10w60 EL (The high mileage, not the race version) and change it every 5000 miles max. Did the garage fit a new oil feed pipe when the turbo was changed ?? They often block up with varnish and that will fry the turbo oil seals very quickly!
__________________
2003 V40 1.9TD Mods: Scratches, bent bumpers, raised REAR mats & internal mud guards. SHELL ULTRA 5/40 & LIQUI MOLY CERATEC. Everyone should DYOR (Do Your Own Research) Last edited by skyship007; Dec 4th, 2017 at 09:22. |
|
Dec 4th, 2017, 18:58 | #12 |
New Member
Last Online: Dec 10th, 2020 19:38
Join Date: Dec 2017
Location: Istra
|
|
Dec 19th, 2017, 23:21 | #13 |
Senior Member
Last Online: May 23rd, 2024 17:49
Join Date: Jul 2011
Location: cork
|
eventually got the car nearly finished, had some issues with injectors coming loose but now fixed, also changed the valve on the oil separator, fuel consumption gradually improving but I have oil spraying onto the top of the engine and I cannot find the source, (not enought time in the days) but definitely the car is back to having power took it for a motorway run and the only indication that it was going up a hill at around 130kms was the increase in fuel consumpion.
. Also has not clogged up the DPF yet, which it did in the few miles I drove after doing the rings but prior to changing the valve.... so my advice to anyone with oil consumption or dpf issues is to replace part no. 8642424 Now brake pressure sensors showing faults AARRRRRGGGGGHHHHH (I have two on my donor car so perhaps not too bad....) |
Dec 20th, 2017, 08:24 | #14 |
Premier Member
Last Online: Mar 20th, 2024 18:26
Join Date: Jan 2016
Location: Cross Country
|
...which is a "Valve, Crankcase breather" (for those who do not know the Volvo parts catalogue off by heart)
__________________
XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65. |
The Following 2 Users Say Thank You to SwissXC90 For This Useful Post: |
Jul 1st, 2018, 11:53 | #15 | |
New Member
Last Online: Sep 18th, 2022 15:48
Join Date: Sep 2017
Location: Sevilla
|
Quote:
I have the same problem with oil burning. My car its a xc90 with M66 transmission. your theory is very interesting.Could you check it? Thanks very much |
|
Jul 25th, 2018, 23:36 | #16 |
Senior Member
Last Online: May 23rd, 2024 17:49
Join Date: Jul 2011
Location: cork
|
Just to update.
Since I did the PCV (preceeded by the rings and new turbo) and followed by the liqui molly DPF clean, I have covered thousands of miles both inner city driving and many trips to the beach 20 miles or so together with a dozen or so trips of over 300mls per day. Many of my trips involved drawing a heavy trailer (2.5t) I have not used a drop of oil, not had a fault light connected to the engine. Having considered things at length I think the pcv was the issue, or at least a major part, one of the issues that I was not able to understand was the presence of unburnt oil in the DPF, but I think I know the cause. I think the PCV valve goes faulty so that the spigot to which it connects via the pipe over the top of the engine, being too near the turbo, creates a vacuum, drawing oil filled air up out of the sump through the PCV pipe/ casing, this is then fired into the cylinders and burned, but dependant on the demands of the engine the D5 does not always inject fuel on every stroke on each injector, so that at times the oil filled air simply passes through chambers and onwards into the DPF. Bottom line is that doing the rings is a relatively easy job and much easier and cheaper than a new turbo, I really would like to know what improvement a new pcv valve would make on its own. |
Jul 26th, 2018, 06:52 | #17 |
Me ? Surely Not!
Last Online: Apr 25th, 2024 19:48
Join Date: Jul 2010
Location: 2007 Volvo XC90 D5 Geartronic. South of Hadrians Wall.
|
After following your woes prior to me getting my 07 XC90, changing the PCV almost as soon as I got the car seemed a sensible, cheap precaution.
Touch wood, so far no issues with this engine but I certainly feel that you came to the correct conclusion and are now seeing the rewards with your car.
__________________
“Do the right thing. It will gratify some people and astonish the rest.” – Mark Twain 😊 2007 Volvo XC90 D5 SE Geartronic |
Aug 14th, 2018, 13:29 | #18 | |
Junior Member
Last Online: Jul 5th, 2021 12:54
Join Date: Nov 2017
Location: Norwich
|
Quote:
I have replaced the PCV valve on mine and it has made no difference. do you think your new rings took a period of time to bed in before the oil consumption reduced? |
|
Aug 22nd, 2018, 22:39 | #19 | |
Senior Member
Last Online: May 23rd, 2024 17:49
Join Date: Jul 2011
Location: cork
|
Quote:
Head Gasket and bolts, 5 sets of rings, etc all bough on line, I also had the head skimmed and replaced the valve stem seals... |
|
Aug 22nd, 2018, 22:51 | #20 |
Senior Member
Last Online: May 23rd, 2024 17:49
Join Date: Jul 2011
Location: cork
|
really took no running in, honed the cylinders first, some say drive it hard others say drive it easy, because it continued to guzzel oil on my first trip I had no choice but to drive it hard to make it go,,,
the next trip was with a new pcv and a new resonator box with the DPF cleaned. Not a drop of oil used since... |
The Following User Says Thank You to osullivant For This Useful Post: |
Tags |
dpf filter, euro 4 d5, oil burning, regeneration, vacuum actuator |
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
Thread Tools | |
Display Modes | |
|
|