A Challenge - Nissan Murano

amindu · 02-22-2013, 03:12 PM

So, couple mos ago i started to notice a whinny noise coming from the engine compartment, which increased as you would accelerate. I did some searches on here, and others have noticed it. The following has been replaced yet the noise is still there and the dealer has given up for now.

Steering pump, rack, shaft,
timing chain tensioners, and chain.

Anyone have any other thoughts or ideas of where this fix lies?

Thanks

MuranoSV · 02-23-2013, 12:03 AM

Intake air leak ?

amindu · 02-25-2013, 08:16 PM

Quote:

Originally Posted by MuranoSV

Intake air leak ?

I will mention that to the dealer, however recently i found out my A/C unit does not blow cold air at all, im wondering if it could be the compressor thats making the whining noise if its low on freon or something.

Warhammer · 02-25-2013, 08:27 PM

I had a whining noise but it was the front bearings. Had those replaced and it's gone!

Pilgrim · 02-25-2013, 10:47 PM

Would that be a whinny noise (horses whinny)...

Whinny'ing horse - YouTube

Or a whiny noise (high pitched)

Inquiring minds.......

Carguy75 · 02-26-2013, 10:24 AM

Quote:

Originally Posted by Pilgrim

Would that be a whinny noise (horses whinny)... Whinny'ing horse - YouTube

Or a whiny noise (high pitched)

Inquiring minds.......

Good one! Someone has some "real horsepower" under the hood!

Seriously, maybe the belts or maybe a loose belt pulley causing the noise. An even worst case could be the wheel bearings going bad. Take it to a shop and have a mechanic check it out.

amindu · 02-26-2013, 03:15 PM

Quote:

Originally Posted by Carguy75

Good one! Someone has some "real horsepower" under the hood!

Seriously, maybe the belts or maybe a loose belt pulley causing the noise. An even worst case could be the wheel bearings going bad. Take it to a shop and have a mechanic check it out.

They (Dealer) had the car for a month and couldn't figure it out

RkyMtnHi · 02-26-2013, 03:20 PM

I think I would try a different dealer as a first step.

Pilgrim · 02-26-2013, 03:28 PM

If it is a whining noise, then it's coming from a belt, a bearing or some other rotating part. The OP didn't say whether it was audible when the vehicle is stationary or only when moving.

I will assume it's audible when stationary.....

The first step is to use an automotive stethoscope (under $10 at any parts store) and go over the motor item by item, being careful (of course) not to get tangled in anything.

One thing which jumps out at me is that he specified they replaced the timing chain tensioners, but he hasn't listed any of the belts or belt tensioners. Those would be among the first candidates I'd look at.

It also occurs to me that removing belts and driving it briefly would tell him whether it's something that's belt-driven or not.

amindu · 02-26-2013, 03:43 PM

Quote:

Originally Posted by Pilgrim

If it is a whining noise, then it's coming from a belt, a bearing or some other rotating part. The OP didn't say whether it was audible when the vehicle is stationary or only when moving.

I will assume it's audible when stationary.....

The first step is to use an automotive stethoscope (under $10 at any parts store) and go over the motor item by item, being careful (of course) not to get tangled in anything.

One thing which jumps out at me is that he specified they replaced the timing chain tensioners, but he hasn't listed any of the belts or belt tensioners. Those would be among the first candidates I'd look at.

It also occurs to me that removing belts and driving it briefly would tell him whether it's something that's belt-driven or not.

Thanks Pilgrim, the belts have been replaced but that didnt solve anything. Also the noise is there when stationary, and increases in intensity when you accelerate

Warhammer · 02-26-2013, 06:24 PM

Is the noise repetitive in nature or is it a constant whine?

gnk778 · 02-26-2013, 07:00 PM

Does the whinning go with the rev of the engine when driving, or speed when driving, or in Park, or turning?
If noise goes with rev when driving, or if while in Park, you can rule out driveline components.
If it only goes with engine rev, then it's most likely engine related or connected like PS pump, AC compressor, or alternator, pulley, etc.
If with speed, then it's driveline related.
Does it disappear when warm? If it does, chances are your steering fluid is due for a flush.

Or, like what carguy74 indicated, you may have a turbo or blower without even knowing it!

amindu · 02-26-2013, 07:02 PM

Quote:

Originally Posted by Warhammer

Is the noise repetitive in nature or is it a constant whine?

it is a constant whine

Pilgrim · 02-26-2013, 10:37 PM

I'm starting to wonder about vacuum leaks, but they aren't really a whining sound.

It could be a bearing in something like an alternator. Replacing the belts was a good move, but I think it would be worthwhile to start it without belts...if no noise, then it's something the belts drive.

Warhammer · 02-27-2013, 09:47 AM

What is the general location of the whine. This will eliminate either tranny or engine.

I feel like I'm playing a game of 20 questions!

02-22-2013, 03:12 PM	#1 (permalink)
amindu Registered User Join Date: Oct 2010 Location: Dallas, TX Posts: 163	A Challenge So, couple mos ago i started to notice a whinny noise coming from the engine compartment, which increased as you would accelerate. I did some searches on here, and others have noticed it. The following has been replaced yet the noise is still there and the dealer has given up for now. Steering pump, rack, shaft, timing chain tensioners, and chain. Anyone have any other thoughts or ideas of where this fix lies? Thanks

02-23-2013, 12:03 AM	#2 (permalink)
MuranoSV Registered User Join Date: Jan 2012 Location: Ontario, Canada Posts: 191	Intake air leak ? __________________ 2011 Murano SV AWD CAN. Spec. - Carbon Silver / Black - DDM 5k HID Conversion - DIY 5-LED Running Lights - Factory Rubber Floor Mats - Trico Force Windshield Blades

02-25-2013, 08:27 PM	#4 (permalink)
Warhammer Registered User Join Date: Jun 2008 Location: Rio Rancho, NM Posts: 2,757	I had a whining noise but it was the front bearings. Had those replaced and it's gone! __________________ *Ain't nothin' MO fun than drivin' a MO.*

02-26-2013, 03:28 PM	#9 (permalink)
Pilgrim Registered User Join Date: Dec 2009 Location: Fort Collins, CO Posts: 3,244	If it is a whining noise, then it's coming from a belt, a bearing or some other rotating part. The OP didn't say whether it was audible when the vehicle is stationary or only when moving. I will assume it's audible when stationary..... The first step is to use an automotive stethoscope (under $10 at any parts store) and go over the motor item by item, being careful (of course) not to get tangled in anything. One thing which jumps out at me is that he specified they replaced the timing chain tensioners, but he hasn't listed any of the belts or belt tensioners. Those would be among the first candidates I'd look at. It also occurs to me that removing belts and driving it briefly would tell him whether it's something that's belt-driven or not. __________________ 2007 Murano 2009 BMW 328xi 1983 280ZX Turbo

02-26-2013, 06:24 PM	#11 (permalink)
Warhammer Registered User Join Date: Jun 2008 Location: Rio Rancho, NM Posts: 2,757	Is the noise repetitive in nature or is it a constant whine? __________________ *Ain't nothin' MO fun than drivin' a MO.*

02-26-2013, 03:20 PM	#8 (permalink)
RkyMtnHi Registered User Join Date: Dec 2012 Location: Littleton, CO. Posts: 40	I think I would try a different dealer as a first step.

02-26-2013, 07:00 PM	#12 (permalink)
gnk778 Registered User Join Date: Jan 2007 Location: Vancouver, Canada Posts: 14	Does the whinning go with the rev of the engine when driving, or speed when driving, or in Park, or turning? If noise goes with rev when driving, or if while in Park, you can rule out driveline components. If it only goes with engine rev, then it's most likely engine related or connected like PS pump, AC compressor, or alternator, pulley, etc. If with speed, then it's driveline related. Does it disappear when warm? If it does, chances are your steering fluid is due for a flush. Or, like what carguy74 indicated, you may have a turbo or blower without even knowing it!

02-26-2013, 10:37 PM	#14 (permalink)
Pilgrim Registered User Join Date: Dec 2009 Location: Fort Collins, CO Posts: 3,244	I'm starting to wonder about vacuum leaks, but they aren't really a whining sound. It could be a bearing in something like an alternator. Replacing the belts was a good move, but I think it would be worthwhile to start it without belts...if no noise, then it's something the belts drive. __________________ 2007 Murano 2009 BMW 328xi 1983 280ZX Turbo

02-27-2013, 09:47 AM	#15 (permalink)
Warhammer Registered User Join Date: Jun 2008 Location: Rio Rancho, NM Posts: 2,757	What is the general location of the whine. This will eliminate either tranny or engine. I feel like I'm playing a game of 20 questions! __________________ *Ain't nothin' MO fun than drivin' a MO.*

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