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Pigeon_uk
Member Since: 10 Apr 2024
Location: Wiltshire
Posts: 1
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| Excessive Oil Consumption (SOLVED) |
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Hi,
Any help with diagnosing excessive oil consumption on 2.7 would be gratefully received. I’m currently doing top mark of the dipstick to the bottom in 300ish miles, below is what I know so far:-
Starts from cold or after being stationary for a hour with a large puff of blue/white smoke. There is no smoke otherwise in normal driving and it clear pretty much instantly after starting.
Passenger side (turbo side) intercooler hose is wet but not excessive.
Drained around half a mug of oil from the drivers side hose and the chamber before the inlet manifold.
The crankcase oil vapour return just before the turbo has oil present but nothing concerning.
Oil separator is the later EU4 type, the front tubes to the crankcase are seated but loose in the grommets, unable to stop these working loose. Read a post about the separator being loose causing issues but I would expect the vapour line to be saturated?
Removing the oil cap and dipstick when up to temp and there is no blow by present.
Haven’t long brought the car and would like to try and diagnose and fix.
Gut feeling is rings are ok and it’s not blow-by, are valve stems seal a thing on modern cars and would they account for that amount of oil loss? I’m thinking change PCV and if that doesn’t work change the turbo… your thoughts would most welcome.
Cheers!
SOLVED!
My issue turned out to be oil separator related. Replaced the separator valve and the seals into the crankcase. The valve wasn't seated correctly in the block, one of the tabs from the oil cooler gasket was bent down preventing the valve from sitting in the block correctly. I suspect with no pressure from the crankcase acting on the valve the draw from the turbo inlet was syphoning oil from the part of the valve that should have been returning oil to the sump. Done a 1000 odd miles now and now smoke on start up and no oil loss.
Last edited by Pigeon_uk on 4th Jul 2024 12:26 pm. Edited 1 time in total
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 6th Jun 2024 11:52 pm |
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defector
Member Since: 23 Feb 2009
Location: Greater Manchester
Posts: 1442
 
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Symptoms point to turbo.
Go to rear of Disco and run a finger into the exhausts - see if the exhaust is black and oily.
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| 7th Jun 2024 3:02 am |
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Oswiperus
D3 Decade
Member Since: 02 Apr 2010
Location: Chelmsford, Essex
Posts: 1595
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My Friend had exactly the same symptoms a few years ago, Puff on start up but otherwise seemed clear while driving and using the amount of oil that you're using. He was advised likely turbo so had it changed and problem still existed. Oil separator was the cause in the end.
I would change the cheaper part first, I believe the oil separator is very tricky to get out but it is do-able. Stu
2016 D4 Landmark current
2022 Defender D300 SE Gone 
D4 2014 XS Commercial - Gone
D4 2016 hse lux montalcino red - Gone
D3 2005 se java black - current
D3 2005 base manual - gone
D2 1999 TD5 E white - current
Last edited by Oswiperus on 7th Jun 2024 2:49 pm. Edited 1 time in total
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| 7th Jun 2024 8:04 am |
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urhunden
Member Since: 15 Jan 2010
Location: Stockholm
Posts: 809
 
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Have the same on my d4 3.0 ltr MY 2011.
Engine renovated by Oval.
Takes 1 ltr oil per 4000 kms.
No puffs or smoke from exhaust.
Too much oil in intercooler tube.
Some smoke when opening oil cap.
Have changed:
Secondary turbo. Updated return tube.
CSOV
Oil catcher/separator
Cannot find out what is wrong Discovery 4, MY2011, TDV6 Auto
Discovery 4, MY2013, SDV6 Auto
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| 7th Jun 2024 10:47 am |
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