2004 Y61 Whine

Hi,

Bought this Patrol in 2009, been great, has 213,000 on the clock. About 4 weeks ago it started to whine, no previose issue except a rebuilt alternator about 4 months ago. Put it in for the 200 thou service and was told to go to a turbo specialist who advised it was turbo, replaced it and whine still there, furthur diagnosis was advised timing gears but no guarantee and no real confidence from 3 mechanics. Took it to a diesal specialist who advised intercooler, replaced it, same whine. Diesal specialist said definatly not timing gears, he wants another crack and am taking it back Monday. I have no issue with the work done, peeps have found broken stuff and fixed it, all good, but if anyone has heard this or got any ideas I'd appreciate it.

Whine can be heard here, http://www.youtube.com/watch?v=i2xPGYNEhTc&feature=plcp

Hi mate jump over to the intros and let us know a bit about yourself, its just something the forum asks of all newbies.
You'll get a better response
Is the noise there standing still, have you a snorkel fitted?
Not your tensioner pulley ??? Just had listen sounds external
Very long screw driver to your ear and touch a few areas with care.

Howdy, will do, yep have a snorkel and noise is there still and moving, in gear and out, clutch in and out, some say not in idle but I reckon it's there, just not as pronounced, whine increases at revs, in top barley noticeable but same speed down the gears louder and higher in pitch.

There have been some very experienced mechanics that have had a crack at this, hoping to find someone who has heard it before.

How old is your drive belt?

I have similar sound from around turbo area (apparently) but only when boost is 10psi of higher in my GU1V with 3 inch exhaust. As it is only there under load, can't hear it in shed. Checked all hoses before and after turbo but no luck. Definately not turbo itself so must be a leak somewhere. Will try soapy water next on all joins. At about 150klm,I suppose I should change belts that have been in shed for a couple of months. Will follow thread with interest.

Car hasn't got log books but is an ex telstra truck so well serviced, I havn't replaced the drive belt so thks for the suggestion. Wizard mine is anytime the moter revs it's noticable, I reckon I can hear it at idle and in top but it gets mixed in with other noises so hard to pick up, at 100 I can take it to 4th and u can hear it wind up pretty easy, basically anytime the accelerator is down it's whining. The diesal guys are taking it back on Monday and will drop everything they can off it to try and work it out.

Can't be doing any damage if you're still driving it, will be interesting to find what the culprit is.
If a diesel mech can't pick it up standing next to it, got buckleys doing it from key board.
Would like to be there though as I like diagnosing things like Newby

yeah just had it up to 130 on the M1, actually kinda/nearly hoping something blew, and yeah, more hoping for a YEAH I HAD THAT AND IT WAS.... :)...thing is I'll be doing some beach work up at Fraser/40 mile beach week after next so bit worried it might go bank/suck in some sand during that trip, but yeah, if the boys can't find it next week I'm going for it, not like I'm going anywhere remote and could setup a nice camp fire story for the future :P

Has anyone checked alternator or water pump bearings, just a thought

Hi Mark,

You would think the mechanics could sort it out, but a whine that increases with the revs could be due to the belt tensioner pulley wearing out ( common issue ), bearing on the AC Compressor ( another common issue ), leak on the EGR Valve ( might have small crack or they can warp after time and heat so it doesn't seal properly against the gasket ), turbo - which should be sorted anyway with a new one, drive belt itself as already suggested, water pump, alternator bearings.

One way to sort this out is to remove the serpentine drive belt from the front of the engine, start it up give it a rev or two and see if the whine has disappeared. If it has, then it is definitely something running on the belt. This wont hurt the engine if you don't run it for too long - i've seen the panel beaters around my work driving cars in and out with no radiators whilst they are being repaired. As long as the vehicle is only running for a minute, it won't build up enough heat to damage anything.

I'm with your mechanic in saying it is unlikely to be timing gears.

As three dogs mentioned a snorkel will help you hear the spooling of the turbo, which is a normal noise, but usually hidden under the bonnet - maybe you are hearing what is considered to be normal noise as hearing it as a whine....although you would think the mechanics would be onto that one straightaway.

Mic

Thanks guys, picked it up today the Diesal mechanics couldn't work it out, they have dropped all the belts, blown black smoke through it and found the intercooler leaked like a sieve and replaced that but whine still there, they can't hear the noise when the turbo hose is disconnected, blew black smoke up the exhaust and couldn't see a leak, admittedly not able to generate much pressure but higher than atmosphere. Checked EGR and it's good, no leaks, current take is unlikely a major issue so drive it till it gets worse/becomes apparent what the issue is, thanks for the feedback and I will certainly advise if I get to the bottom of it....bottom line, I have a Rainbow Beach/Fraser/40 mile beach trip planned for the next fortnight and if it blows on the beach then I might nudge it to the water line, no way am I not going for it, so it whines.....must be a girl :P

Maybe---
Garbage behind A/C pulley?
A/C pulley bearing?.
Power steer pump or valve ?
Does the turbo system draw from emission control system/piping? could have a partial blockage