Outer Limits 4x4 Board

Gday peoples, My 97 v8 disco has developed an engine wine. Its a dull wining sound and is engine reves related Ie it increases with engine revs. I hear alot of older commodors with the same wine. Thinking either Alternator bearings or aircon bearings. Any ideas?

I would do the listening-through-a-hose trick. Put a bit of hose in your ear and point the other end at various suspect items in the engine bay. It will be much more obvious where the noise is louder.

chimpboy wrote:I would do the listening-through-a-hose trick. Put a bit of hose in your ear and point the other end at various suspect items in the engine bay. It will be much more obvious where the noise is louder.

Allready did but beeing partially deaf isnt doing it for me. the two suspects are the alternator and aircon compressor. both as load as each other. Interestingly though when I start it first thing in the morning the engine idel is slightly erratic as well and started same time as wine so im leaning more to alternator bushes or bearings.

Can you remove one belt to eliminate one or the other? As long as you aren't disabling the water pump or something at the same time it should be okay to try.

chimpboy wrote:Can you remove one belt to eliminate one or the other? As long as you aren't disabling the water pump or something at the same time it should be okay to try.

No chimp I cant its got a serpintine belt. A mechanoc I just spoke to recons its the ideler pully more than anything, so I hope hes right.

i would say idler bearings i have replaced em on my tdi 3 times from water crossings

My 94 V8 Disco also has a whine. However it is only a whine and not a grumble so I'm not too concerned

I figure it is the bearing in either the idler pulley, aircon pump, alternator or power steering pump. Possibly a combination of all of the above.

Utemad wrote:My 94 V8 Disco also has a whine. However it is only a whine and not a grumble so I'm not too concerned

I figure it is the bearing in either the idler pulley, aircon pump, alternator or power steering pump. Possibly a combination of all of the above.

Yes this is just a wine to, im not overly concerned about mechanical failier but its a f8cking annoying noise. Ill get a new ideler pulley for it this week.

Can't just replace bearings in the current pulley?

chimpboy wrote:Can't just replace bearings in the current pulley?

I duno but it aint worth the time and effort. Its easier just to get a new one

the noise was getting to me so I went and bought new pulley. put on and all fixed, quiet as a mouse.

Well done.

I changed the air con idler pulley on my Rodeo once. Was a very loud grumble. I received two bruised, bloody, swollen fingures for my efforts. Was nice and quiet though

Only had a 6 hour drive home from where I fitted it too.

the bearings are 6 bucks each and take 15 mins to replace whats a new pulley worth?

cooter wrote:the bearings are 6 bucks each and take 15 mins to replace whats a new pulley worth?

$50.oo

chimpboy wrote:I would do the listening-through-a-hose trick. Put a bit of hose in your ear and point the other end at various suspect items in the engine bay. It will be much more obvious where the noise is louder.

I did this yesterday for my whine and it appears to be the alternator. I saw a mechanic I used to use do this with a stethoscope type tool. Didn't think of just using a bit of hose but it worked well.

It didn't help locate the vacuum leak though. A whistle coming from the driver's side of the plenum chamber somewhere. I thought I had fixed it previously but it came back fairly quick.

I'm glad someone has said you can replace the idler bearing for $6. I would have just bought the pulley as last time in my Rodeo the bearing and pulley were one piece for $25.

Utemad wrote:

chimpboy wrote:I would do the listening-through-a-hose trick. Put a bit of hose in your ear and point the other end at various suspect items in the engine bay. It will be much more obvious where the noise is louder.

I did this yesterday for my whine and it appears to be the alternator. I saw a mechanic I used to use do this with a stethoscope type tool. Didn't think of just using a bit of hose but it worked well.

It didn't help locate the vacuum leak though. A whistle coming from the driver's side of the plenum chamber somewhere. I thought I had fixed it previously but it came back fairly quick.

I'm glad someone has said you can replace the idler bearing for $6. I would have just bought the pulley as last time in my Rodeo the bearing and pulley were one piece for $25.

vacume leak the easiest way to find it is with the wifes vaccume cleaner...

remove the MAF (carby or equivelent) and tape the vacume hose to the remainder of the inlet manifold.

stick a potatoe into the end of your tail pipe(s) and with the vacume cleaner as far away as possable and with something between you and it as a sound dampner turn it on..

a, make sure that you have the potatoes only just over the end of the pipe(s)
b, make sure the vaccume cleaner can breath, if it has one of those little holes that can be opened to stop you creating no flow open that up..

you should find said leak in no time..

muddydigger wrote:vacume leak the easiest way to find it is with the wifes vaccume cleaner...

I got told that on AULRO too. Haven't done that method yet though but I will soon as it must be the only way of doing it without leaning over a hot motor and revving it so you can hear the whistle as the revs die down. Not my idea of fun.

Tried soapy water spray and WD-40 but it didn't help.

Might try it tonight as it is really pissing me off right now.