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Dieslndust
X-TRAIL ENTHUSIAST
Date Registered: 08-2009
Location: Port Adelaide
TOTAL POSTS: 133
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Re: Oil on the air filter and Oil Separator Leaks (T31 Diesel)
Okay Guys and Girls - Joey is back in town for a few days
Firstly - DO NOT REDUCE THE OIL IN YOUR ENGINES
It is there for a reason - it is called splash lubrication for the crank and bottom end etc
Reducing the oil volume will not solve or reduce the problem. They are telling you porky pies!
The oil that is getting into the system is in vapour form caused by atomisation of oil under pressure ie pressure feeds to cam journals etc.
Dont forget that this is also a closed positive crankcase engine ie there is always a build up of pressure with in the engine - it is required to pass the emission laws as there is not allowed to be any discharge to the atmosphere so they channel that vapour under low pressure back into the engine, that is the problem.
The only permanent solution to the problem is to redesign and improve the efficiancy of the oil seperator unit located on the top of the engine.
End of story - full stop.
Cheers Joe
--- Joe & Jan
2009 TL Manual - Diamond White
Nudge Bar, Lightforce Spots, Tinted Windows, UHF Equiped, Fitted seat covers,Front bash plate,Dash matt, Towbar,Flat mirrors, Silenced Key Alarm, Custom aluminium rear sand slide plate, Provented
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4/Feb/2012, 12:01 pm
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Exywarrior
X-TRAIL FANATIC
Date Registered: 10-2011
Location: Darwin, NT
TOTAL POSTS: 325
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Re:
Long awkward pause?
No post in this thread for over a month. I'd like to be able to agree with Joe that it is "End of Story - Full Stop" but for some members who are still suffering this problem the mystery still remains.
Funnily, for me, after 6,000km I still have absolutely no sign of oil on my oil filter. There definitely seems to be an inconsistency between cars that suffer this problem and cars that don't.
And the oil on my dipstick is still chockers and I no, don't have a Provent.
Any news or new stories from anyone on this strange problem?
--- Mark T
2011 Series 4 T31 TL Auto - Twilight, factory towbar, factory mats, tinting, Cooper CS5s, cathodic protection, paint protection, yada yada...and no Provent
X-2099
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2/Mar/2012, 7:57 pm
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Exywarrior
X-TRAIL FANATIC
Date Registered: 10-2011
Location: Darwin, NT
TOTAL POSTS: 325
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Re:
AusSki,
Very sorry to hear of your woes. When you say EGR light I am assuming you mean the DPF light. Are you a city dweller and do a lot of short trips at low speeds? Just trying to ascertain if there is a pattern that exacerbates the problem. I'm at 7000k's in my TL too and have never had a DPF light, but then again in Perth we regularly travel at speeds at or above 70kmh so the DPF has the chance to burn off regularly.
--- Mark T
2011 Series 4 T31 TL Auto - Twilight, factory towbar, factory mats, tinting, Cooper CS5s, cathodic protection, paint protection, yada yada...and no Provent
X-2099
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24/Mar/2012, 12:52 pm
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Xemplary
X-TRAIL NEWBIE
Date Registered: 07-2011
Location: Perth
TOTAL POSTS: 56
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Re: Oil on the air filter and Oil Separator Leaks (T31 Diesel)
Auski,
My advice is to have your intake system cleaned while under warranty. And then fit the provent as soon as you can.
--- Tempest Blue ST4WD
Headlight and Bonnet Protectors,Slimline Shields,Xtrail Mats,Boot Protector,Dash Mat,F&R Seat Covers,Nissan Towball,Nissan Fog Lights,
Nissan Japan Engine Cover and Cargo Blind.
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24/Mar/2012, 11:37 pm
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Exywarrior
X-TRAIL FANATIC
Date Registered: 10-2011
Location: Darwin, NT
TOTAL POSTS: 325
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Re: Oil on the air filter and Oil Separator Leaks (T31 Diesel)
quote: Xemplary wrote:
Auski,
My advice is to have your intake system cleaned while under warranty. And then fit the provent as soon as you can.
Ausski
Just be wary that if you decide to fit a Provent, there is a chance it will void your warranty if anything else happens to the engine...unless you make the Provent easily removable.
I've done a lot of research into this issue and spoken to a lot of diesel car owners, including a work colleague who owns a Diesel Renault Koleos (has the same M9R engine as the XTrail). Splotches of oil on the air filter seem to be common to most of the modern small turbo diesel engines. Clearly some who have complained in this forum are experiencing more than splotches and indeed seem to have a genuine problem, whilst others are not experiencing it at all. There seem to be a very strange inconsistency in this issue and I find it even stranger that nobody can seem to pinpoint any single cause of the problem...although I'm starting to wonder if it has something to do with how much low-speed driving the car does. Here in WA I spend a lot of time at 70km/h or above and it gets a run at 100 for a couple of minutes almost every day. Maybe there is something in that, who knows.
There seem to be many diesel Exy owners who have the oil-on-the-filter problem and report that it has never given them dramas. Others have simply replaced the air filter with a K&N element that means the filter is cleanable and re-usable and that seems to be a good idea. Others have taken the more drastic action of fitting a Provent 200. Whatever you do I guess is ultimately up to you but given my Exy is leased and I'm getting all the servicing done by the dealer, I have no plans for a Provent and thus far (touch wood) I have not experienced the problem. My local Nissan dealer is excellent so I've decided to not fiddle with the car and just leave things be!
Last edited by Exywarrior, 31/Mar/2012, 11:40 am
--- Mark T
2011 Series 4 T31 TL Auto - Twilight, factory towbar, factory mats, tinting, Cooper CS5s, cathodic protection, paint protection, yada yada...and no Provent
X-2099
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31/Mar/2012, 11:39 am
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