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Dieslndust Profile
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Date Registered: 08-2009
Location: Port Adelaide
TOTAL POSTS: 133
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Re: Strange engine noise, oil on the air filter & erratic fuel gauge. (T31 Diesel)


Hold your breath Folksemoticon

I am pulling down the oil units and PVCV system etc as I type - initial observations confirm my suspicions, the problem does originate here somewhere.
There is oil smearing in the air intake ducting etc. and oil droplets from the PVC connection points.

Will post photos and reports when finished and worked out how to post photos

Have to get back to it now!



Last edited by Dieslndust, 14/Jan/2010, 2:38 pm


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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
13/Jan/2010, 11:36 am Link to this post Send Email PM   Send Private Message
 
Robbo0001 Profile
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Date Registered: 07-2008
Location: Brisvegas, Australia
TOTAL POSTS: 1063
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Re: Strange engine noise, oil on the air filter & erratic fuel gauge. (T31 Diesel)


Good to see someone doing something about this themselves emoticon apart from relying on nissan and dealers to rectify it, or bandaid it, or ignore it.

Speedcores catchcan statement 2 posts up, sounds like the easiest way of capturing this crap before it gets back into the air intake system...
Will make interesting reading when your report goes up....

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Dave
99 GU Patrol 2.8TD
Ex-2002 T30 TI Xtrail
13/Jan/2010, 3:23 pm Link to this post Send Email PM   Send Private Message
 
duxbac Profile
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Date Registered: 02-2004
TOTAL POSTS: 288
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Re: Strange engine noise, oil on the air filter & erratic fuel gauge. (T31 Diesel)


Have heard all sort of stories about this problem on modern diesels with turbos.Some say should do away with the egr system and use blue stuff,like large truck engines.This seems to be a problem on later diesels with the new pollution systems,One suggestion is the type of oil used,the oil baffle system,and the fuel not being up to scratch?Dont know about the last one..Engines being hotter in australia causing vapour with the oil.I really do not know,but i believe Nissan is not on its own on this.This is a line told to me by a brother of a mechanic,and he is scratching his head.The fix will be interesting,and this makes me happy that i own a 2003model with a petrol engine and a standard auto unit.I do feel sorry for you people that own a new diesal and have been landed with this problem.Is this a problem in Europe ?cheers

Last edited by duxbac, 13/Jan/2010, 5:31 pm
13/Jan/2010, 5:10 pm Link to this post Send Email PM   Send Private Message
 
Dieslndust Profile
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Date Registered: 08-2009
Location: Port Adelaide
TOTAL POSTS: 133
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Re: Strange engine noise, oil on the air filter & erratic fuel gauge. (T31 Diesel)


Speedcore

I would love you to get a description or even better a look at the internal air passages of the EGR when they have it down

i would like to know the colour of the contamination and its apearance ie is it dry and sooty black, or oily and sooty black, or just plain looking old engine oil smeared all over. the key area to look will be where the electronic sensors are located and their surfaces as well, this is where the readings are taken.

Have faith brother - i love the car as well and am trying to find a solution - thinking about your catch can idea not as stupid as it sounds, just have to get the correct filter ratings.

I am now firmly convinced that the EGR and DPF problems are directly caused by this dodgy oil seperator system

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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
13/Jan/2010, 8:26 pm Link to this post Send Email PM   Send Private Message
 
SPEEDCORE Profile
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Date Registered: 12-2008
Location: Brisbane
TOTAL POSTS: 16
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Re: Strange engine noise, oil on the air filter & erratic fuel gauge. (T31 Diesel)


Collected car from Nissan this afternoon. Guys there are at least approachable and happy to chat and not a forced conversation or trying to hurry you out, which I am rather pleased with.

As it turns out, I asked about the appearance of the gunked up valve (was busy at work so could not hang around to see it in person, sorry) and was told that it was not oily at all, was just a crapload of carbon build up.

Given the amount there, the last couple tanks that were of regular BP being the cause of it was not likely a factor in it....(Think way too much build up to have happened over the milage of two tanks.)

However my fuel consumption could be a bit of an indicator.
It could be that I don't drive this thing hard enough to get some serious heat into it and blow the crap away instead of it building up. Apart from giving it a bit of a squirt getting onto the highway every now and then, I drive it for fuel economy.

I'll keep an eye on it and report back if issues arise again, might even check the airbox and intake arm for oil film on the weekend if I get time. But if my issue IS related to not giving it a kick in the guts a bit more often, I think I will have to find a way to break the cycle of positive reinforcement the consumption computer has got me into. emoticon

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Adrian & Marlys
08 TL Manual in Precision Grey
13/Jan/2010, 10:03 pm Link to this post Send Email PM   Send Private Message MSN
 
craig90 Profile
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Date Registered: 12-2009
Location: Brisbane
TOTAL POSTS: 90
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Re: Strange engine noise, oil on the air filter & erratic fuel gauge. (T31 Diesel)


This is a pic of my airfilter after the 30000km service do you think i should be concerned ?

 Image

I also replaced it with a K&N filter (and i do notice the difference) should i be concerned in anyway using the K&N air filter with the EGR problem ?

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X-1467 08 T31 TL Auto Platinum: Tinted Bonnet Protector, Tinted Windows, Fitted Seat Covers F&R, Rubber mats, Phone kit, Luggage Carpet, Weather Shields, Dash Mat, Tow bar, K&N filter, Twin screen DVD Player (the new Kingswood)
14/Jan/2010, 10:09 am Link to this post Send Email PM   Send Private Message
 
cooch t31 Profile
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Date Registered: 06-2008
Location: Blue Mountains, NSW
TOTAL POSTS: 5966
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Re: Strange engine noise, oil on the air filter & erratic fuel gauge. (T31 Diesel)


That's not a good look for an air filter, it could cause dramas down the track due to the dust clogging the filter much quicker.

Is this filter only 10k old? they should have replaced the filter with your previous 20k sevice.

The K&N also uses oil but is much thiner(not engine oil) so dirt doesn't stick to it as much.

---
Tony X-891c

HERE is my D22 Navara
HERE is my old 2008 T31, ST Series1

14/Jan/2010, 10:19 am Link to this post Send Private Message
 
SPEEDCORE Profile
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Date Registered: 12-2008
Location: Brisbane
TOTAL POSTS: 16
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Re: Strange engine noise, oil on the air filter & erratic fuel gauge. (T31 Diesel)


14/01/2010 Ok I got some bad news. Drove home during my lunch break, 2 mins in the car and the MIL came on.

When I got home, decided to pull the air filter out and low and behold, it has oil on it, and the intake arm from the filter box to the turbo has a THICK film of oil with what appears to be alot of fine soot in it.

I'm currently at home and going to try to take pics before heading back to work, via Nissan.

EDIT: Power loss is also VERY noticable! Power that is usual at around 1750 is only comming on around 2000-2100 rpm.

Now for some pics.... sorry trying to get the resolution a bit higher.... just click on these links

http://lh4.ggpht.com/_8kzFqoIh9YU/S06HuruH3HI/AAAAAAAABmc/kEvzq-9BRzM/s800/DSC02230.JPG

http://lh5.ggpht.com/_8kzFqoIh9YU/S06Hsv_gXMI/AAAAAAAABmY/vf9Glzr7IU0/s800/DSC02227.JPG



http://lh4.ggpht.com/_8kzFqoIh9YU/S06HqIDB02I/AAAAAAAABmU/-aMejP9wcsY/s800/DSC02226.JPG
http://lh5.ggpht.com/_8kzFqoIh9YU/S06HneGRM8I/AAAAAAAABmQ/dI6pXWHcOYs/s800/DSC02225.JPG


Last edited by SPEEDCORE, 14/Jan/2010, 1:01 pm


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Adrian & Marlys
08 TL Manual in Precision Grey
14/Jan/2010, 12:32 pm Link to this post Send Email PM   Send Private Message MSN
 
Dieslndust Profile
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Date Registered: 08-2009
Location: Port Adelaide
TOTAL POSTS: 133
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Re: Strange engine noise, oil on the air filter & erratic fuel gauge. (T31 Diesel)


Sorry to here about that Adrian - Nissan did not fix the problem

The first part of this report was going to be on what to look for in the intake areas but you have allready worked this out

The scarey part is just how far the consequences have reached. The air Filter oil is just minor!

Removed all piping on the air intake side right up to the throttle sensor it is all soaked in engine oil in a car that has only driven 5,842 kms

If i could get these damned photos to go on the web site i would do it - PM me with your email and i will send to you. Jalal you have got me knackered on how to post these it all takes far to long. (have about a dozen or so to put up and explain about)

The long and short is that to fully fix this problem Nissan need to add a particle filter to the PCV system. A thirty second particle test is leaving far to much oil.

The entire air intake system has to be cleaned out and de greased right up to and including the intake manifold which houses the EGR sensor plus other things such as turbo sensors and throttle activation units. All of these will be contaminated with engine oil. This also includes the charge air coolers in front of our lower radiators as these will be filling up with oil as well!

All of this engine oil vapour etc gets sucked into the combustion chamber and ignited as per normal - however engine oil is not the same as diesel oil and as such does not share the same ignition properties! it will leave a sooty black crappy mess after ignition (Just burn some to find out what i mean - but do it outside)

Any way this goes into the exhaust pipe most of the time and the poor old DPF has to try and deal with it wether it can or not only time will tell BUT (Yes guys there is always a but!) at times some of this exhaust gas is recycled through the engine via the lower section of the EGR right under the sensor! so where this poor sensor gets a double dose of all crap.

I am going to talk to my dealer soon now that i have the cold hard facts and can argue until the cows come home and will wait and see what the out come is!

i am still going with a particulate filter in the PCV line just have to get filter settings right etc for the air flows Blah blah blah should not be difficult

The test of the effectiveness off this will be if any more oil is found in the inlet manifold air pipes.



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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
14/Jan/2010, 3:13 pm Link to this post Send Email PM   Send Private Message
 
Robbo0001 Profile
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Date Registered: 07-2008
Location: Brisvegas, Australia
TOTAL POSTS: 1063
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Re: Strange engine noise, oil on the air filter & erratic fuel gauge. (T31 Diesel)


Craig, to be honest with you, I wouldnt (my opinion) change for a K&N until the EGR issue is fixed. I just cant see a benefit, because you will be washing and re-oiling much earlier than normal. Might as well trash a paper filter until its resolved.

Nissan should cough up for a new filter, its their design that is ruining them, not individual user error.

Adrian, nice pics, shame about what they reveal thoughemoticon
Anyone currently working on a catch can set up? A stock inline fuel filter (see through, with one way filtering....cheap as), will at least catch some of this crap until something better is sorted out.

Ypur MAF (PIC 2) would be (is) covered in crud, so the power loss is understandable in that respect.

Unless the car is sold with a statement that says "if owning a turbo diesel, you must drive at 100kmph for 10 minutes, once a week".... its a nissan design issue, not a fuel one or operator one, in my opinion.

 

---
Dave
99 GU Patrol 2.8TD
Ex-2002 T30 TI Xtrail
14/Jan/2010, 3:19 pm Link to this post Send Email PM   Send Private Message
 


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