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Re: T31 Diesel Turbo Timer
I think you guys are talking about 2 (or 3) different things.
Just to summarise:
Guvnor and swagman is saying that oil is pumped to the turbo's bearing while the engine is running to lubricate it. Guvnor asked the question if this is possible to initiate before the engine is cranked (perhaps with a priming pump if i understand correctly?) Which hasnt been answered yet.
ShreksDonkey is saying that the turbo is not oil cooled, exhaust gasses turn the turbo and no oil is pumped before the engine is turned on.
There was other discussion about the air intercooler which cools down the exhaust gasses before they get to the turbo (keeping it cooler)
I am saying that after you shut the engine down, a coolant system is used to cool the turbo housing, confirmed by Nissan, this is the pump noise you hear when you shut down your engine. Its run time depends on how hot the housing is. It is also best practice to idle your engine for a minute or so after a long drive, or working the turbo hard , to let the turbo spin down - if the turbo is still spinning unlubricated it might cause longer term damage which i think we all agree on!
I guess this is where the turbo timer could be useful, if you keep forgetting to idle after driving a long distance. A minuite or so would be fine.
Maybe just a little misunderstandings, but we are all right in a way 
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Current - '08 T31 Platinum TL Diesel Manual
Mats, Boot Liner, Roofies, Spotties, Tint, Nudgebar, Tow Kit, Bash Plate, Yoko GO12 AT-S, Forum stickers.HiTech Twins, LED Mirrors, Bonnet Protector, LED steps
Old - '04 T30 Ti-L Auto
X-966
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23/Jul/2009, 7:35 am
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Re: T31 Diesel Turbo Timer
You are talking absolute guff Shreks Donkey. This was a legitimate question from someone new to diesel. Have you never asked questions when you dont understand or are genuinely interested in a new topic.?
You obviously missed the point. If someone deems it necessary to manufacture a product that prevents cooking the turbo if you inadvertently turn the ignition off immediately then why not a product that prevents ignition before the glow plug is extinguished?
As for the a/c. Well your ducted heating does not pump immediately so you dont get cold draughts, your a/c doesn't pump so you dont get hot air.
Get off your soapbox and be more tolerant.
Simon.
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Simon, Benalla, VIC., X-1311.
Ex 2007 ST-S Extreme, Manual, Twilight.
New Ride 2008, TS dCi, Auto, Black - Smoked bonnet protector, h/lamp protectors, cargo mat, mats, t/bar.
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23/Jul/2009, 7:49 am
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Re: T31 Diesel Turbo Timer
quote:
Shreks Donkey wrote:
Basically, instead of learning about diesels and the best way to run them, you want someone else to take that responsibility from you so that you can just turn the car on and drive without thinking.
That's a rich comment coming from someone who won't take the time to source a filter from a different dealer, but rather spit out all sorts of abusive crap on the forum to vent their anger at not having everything immediately at-hand.
I'll say the same as Simon ... learn to be a bit more tolerant and fit in with the rest of us on this forum and help out those who don't quite know as much as you think you do.
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Kev X450(c)
2003 Titanium Ti Luxury Series 1 |
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23/Jul/2009, 9:52 am
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Re: T31 Diesel Turbo Timer
Andrew,
Thanks for taking the time and remembering to ask the question during your servicing. Much appreciated indeed.
While I am prepared to admit that after looking into the service manual of the M9R engine, it does show the turbo coolant pump and lines as seen here:
But nowhere does it mention anything about the working of this turbo coolant pump or if it is indeed cooling the turbo after engine shut off or during operation of the turbo and I looked everywhere.
Even the following detailed demo video of the M9R engine doesn't mention anything about the turbo cooling pump or how it works:
I can only trust what the lead mechanic told you and hope he got it right, but I am also contacting Nissan about this to get a more detailed explanation as to how this turbo cooling pump works and when it actually works.
In any case and regardless of what I come back with, the turbo timer device we discussed here can be considered as a secondary reminder preventing you from shutting down your engine too soon and I can't see the disadvantage of it. Not everyone will need it of course, but it is there and it is an option.
Last edited by jalalski, 23/Jul/2009, 8:02 pm
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23/Jul/2009, 10:39 am
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Re: T31 Diesel Turbo Timer
quote:
dronus wrote:
Well i asked the question today when i picked up my T31 from getting serviced.
Had the answer confirmed by the Lead Mechanic aswell.
Ready for it??
The diesel engine fitted to our T31's has a pump which pumps coolant (not oil) around the turbo when you shut down the engine. This is the pump noise that you hear when you shut off your engine. It is controlled by a thermostat which will shut off the pump once the turbo reaches a safe temperature. There is also another humming noise, this is the manifold resetting, or something...
It is also fitted to the Renault cousins.
The recommendation is that if you have been driving for a while (few hours) to idle your engine for a minuite or so before shutting it down to allow the turbo to spin down etc but any longer than that isnt required. If you have only been driving for a few minuites there is no need (unless you have just got out of a bog, or something).
They seemed suprised that someone had gone to the effort to build a specific model for the x-trail!
It wont hurt your engine (i hope) but its not really required unless you cant spend the minuite idling if you cant slow down before stopping.
Hi All,
I have been following this thread as it has unfolded with interest. Firstly as stated above it is still recommended to idle the motor if it had been working hard, this is to stabilize the turbo temperature ( which can achieve up to 1000 deg ) & allow it to cool down as the exhaust temperature at idle is a fraction of what it is at full throttle. The Bogaard timer allows the user to select 30 seconds, 1,2,3,4 or 5 mins idle time, so personally I would let it probably default to 1 minute, it also has an immediate stop function if the situation does not warrant any idle time. I suppose the bottom line it that it is an accessory that is not required to make the car function, similar to a set of mags perhaps, not really required but nice to have if you want to spend the money.
Mark
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2007 TI/L X-Trail T30
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23/Jul/2009, 11:15 am
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Re: T31 Diesel Turbo Timer
Hi Guys,
Hot off the press from Nissan:
Hi Jalal,
There is a pump on these vehicles that pumps coolant through to turbo system on the T31 diesels.
The work shop is certain it runs after the vehicle is switched of but there is no separate thermostat controlling its operation.
The pump is linked into the standard cooling system so the only thermostat in the system is the one for the engine.
Last edited by jalalski, 23/Jul/2009, 11:29 am
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23/Jul/2009, 11:29 am
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Re: T31 Diesel Turbo Timer
That video is pretty cool Jalal, thanks for finding and posting it!
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Current - '08 T31 Platinum TL Diesel Manual
Mats, Boot Liner, Roofies, Spotties, Tint, Nudgebar, Tow Kit, Bash Plate, Yoko GO12 AT-S, Forum stickers.HiTech Twins, LED Mirrors, Bonnet Protector, LED steps
Old - '04 T30 Ti-L Auto
X-966
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23/Jul/2009, 7:58 pm
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Re: T31 Diesel Turbo Timer
Hi guys,
Wow, there's certainly been a bit of action on this thread since I last got the chance to check the forum
Thanks heaps for remembering to follow up the queries with your dealership Dronus - much appreciated. It sounds like they take their responsibilities quite seriously if they are prepared to check things with Nissan beforehand so that they can provide you with authorative answers when you arrive.
Jalal, thanks too for confirming things with Nissan directly.
It's great to hear that what I was told by my mechanic early on about the "whine" you hear for a couple of minutes after switch-off being the cooling pump providing coolant to the turbo, is in fact the truth. It's also great to realise that this M9R diesel engine really is state-of-the-art in this regard.
I should also say that I am NOT in ANY way suggesting that a turbo timer isn't a sensible add-on for the T31 diesel. If I was doing a lot of really strenuous towing, or high speed driving, I would fit one in an instant. There's also something rather cool about being able to smugly say "it's just the turbo..." when someone tells you after you've parked that you've left your engine running!!  (So I hope you sell lots Jalal!)
I have to say that I couldn't be happier with my vehicle in every respect - heaps of power for towing, great on- and off-road capability (well...fits my MY requirements anyway) and BRILLIANT fuel economy.....with a mix ratio of 60% city - 40% highway I NEVER go above 7.2l / 100kms.
Cheers,
Jeff.
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2008 T31 diesel TS manual, Twilight, tow pack, roof bars, left cargo drawer, all round protection mouldings, boot mat, floor mats, luggage blind
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27/Jul/2009, 11:03 am
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Re: T31 Diesel Turbo Timer
Good summary Jeff. Actually this morning after being held up in traffic on the way to work I thought how nice it would be to just be able to jump out of the car without sitting in it idling !
But then I remembered that it was just work, so no real hurry!
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Current - '08 T31 Platinum TL Diesel Manual
Mats, Boot Liner, Roofies, Spotties, Tint, Nudgebar, Tow Kit, Bash Plate, Yoko GO12 AT-S, Forum stickers.HiTech Twins, LED Mirrors, Bonnet Protector, LED steps
Old - '04 T30 Ti-L Auto
X-966
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27/Jul/2009, 2:46 pm
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Re: T31 Diesel Turbo Timer
quote:
dronus wrote:
But then I remembered that it was just work, so no real hurry!
I hope your boss is not reading this. hahahaha 
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27/Jul/2009, 2:50 pm
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