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Black-Racer-799

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Discussion starter · #1 ·
Hellllo again for the next question :lol: 8)

Since a week ago i am hearing a turbo whistle in the cabin. Its at low revs from say 1000-2000rpm when the engine is cold.

My navy has now 180.000km and its the pre-facelift (2006) automatic version WITHOUT DPF.

I don't know how the first owner drove it, the second i do know and it was baad, really bad :evil: Not letting the engine get warm, driving everyday very agressively, etc etc etc

I am the third "driver" not owner and since its my daily and i love it, i drive it mostly normal and sometimes going FULL MADNESS THROTTLE :rockon

Should i be worried about my Navy, maybe i am doing something wrong?
 
Mine made that noise (like a Police siren) for the first mile or so when it was cold. It eventually failed spectacularly on me BUT I don't think you'll be able to tell how long it will last.

If it does let go, you can now buy just the cartridge to refurbish your turbo rather than replace the whole turbocharger.

Don't worry about it though, it could carry on for years like that. :fingersx
 
Discussion starter · #3 ·
Well for the moment .....

I have had a lot of luck with my Navy, never and i really mean never had any major problem. Just maintenance, tires, brakes,..... So yes i hope you are right.

And if it lets go, maybe buying a new Np300 Navara might be an option :lol:
 
Both of my Navara's, 2006 2.5 & 2010 3.0V6 have both had a bit of turbo whine for the first couple of miles when cold. It has never amounted to anything (so far), and that is over a 5 year period, 3 on the 2.5 and 2 on the 3.0.
 
Turbo whistle is pretty normal on most vehicles, especially when cold. The best way to give yourself some peace of mind is to remove the intake pipe into the turbo when the engine is cold (left overnight) and see how much end - float there is in the impeller shaft. Don't worry so much about wiggling the shaft up and down, it's more about the end float where the real issues come about.
The problem with most drivers is that they never let the engine idle for a minute or so before pulling away. This ensures that the thick cold oil has had chance to get around all the engine, especially the turbo and valve gear and can therefore provide lubricating protection before being put under load, that is, dragging the heavy carcass of a truck from standstill up to speed. They also do not allow the engine to get to a decent temperature before asking for serious power and therefore cause a huge amount of wear as the oil and metal parts are placed under a greater amount of stress. More criminally, hardly anyone actually allows their engines to idle for a minute or so when they pull up. That's fine if you have been coasting for the last few minutes without hardly any throttle, but the majority of drivers over rev the engine when doing those final parking moves. This not only wears the clutch components, it makes the turbo spin up to very high speed in order to give the engine power. They then proceed to switch the engine off and walk away! The poor turbo has been spinning at over 100,000 rpm and then suddenly has its oil supply cut off. Do you have any idea how long it takes for a turbo to come to a stop? I don't, but doing it from a high speed with no lube is bound to cause trouble long before a well looked after one.
my advice to anyone is, always idle for a minute on start up, never over rev a cold engine, or place it under undue stress until the temp gauge is in the normal position. Most importantly, allow your engine to idle for a minute before switching off to allow the turbo to only be spinning at an engine idle speed (producing no power).
 
smish46 said:
Turbo whistle is pretty normal on most vehicles, especially when cold. The best way to give yourself some peace of mind is to remove the intake pipe into the turbo when the engine is cold (left overnight) and see how much end - float there is in the impeller shaft. Don't worry so much about wiggling the shaft up and down, it's more about the end float where the real issues come about.
The problem with most drivers is that they never let the engine idle for a minute or so before pulling away. This ensures that the thick cold oil has had chance to get around all the engine, especially the turbo and valve gear and can therefore provide lubricating protection before being put under load, that is, dragging the heavy carcass of a truck from standstill up to speed. They also do not allow the engine to get to a decent temperature before asking for serious power and therefore cause a huge amount of wear as the oil and metal parts are placed under a greater amount of stress. More criminally, hardly anyone actually allows their engines to idle for a minute or so when they pull up. That's fine if you have been coasting for the last few minutes without hardly any throttle, but the majority of drivers over rev the engine when doing those final parking moves. This not only wears the clutch components, it makes the turbo spin up to very high speed in order to give the engine power. They then proceed to switch the engine off and walk away! The poor turbo has been spinning at over 100,000 rpm and then suddenly has its oil supply cut off. Do you have any idea how long it takes for a turbo to come to a stop? I don't, but doing it from a high speed with no lube is bound to cause trouble long before a well looked after one.
my advice to anyone is, always idle for a minute on start up, never over rev a cold engine, or place it under undue stress until the temp gauge is in the normal position. Most importantly, allow your engine to idle for a minute before switching off to allow the turbo to only be spinning at an engine idle speed (producing no power).
+1 some people havent realise they drive a diesel but some scooby racer
 
Discussion starter · #8 ·
@ Stelianos

I don't get it? :?

@ smish46

When the engine is cold till the transmission is up to temp. (the automatic transmission locks its torque converter) i don't overrev it. Some say Max 3.000 RPM i don't go over 2.500rpm (dunno why :lol: )

When its hot i drive normaly and sometimes i go a bit faster 8) . Now its not because my name is "Racer" that i mash the throttle everytime :shock: , don't think Navy would like that :adminfinger

Off course before shutting the engine i normaly wait 30 seconds before shutting the engine down. I also heard its a good idea to wait before shutting the engine down, not only for the turbo but for the automatic transmission? But that is pretty much how i drive :fingersx
 
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