Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[feeutfo]

http://i344.photobucket.com/albums/p326/chrisgixer/BA7DCDE3-5D49-47C4-AEF1-C2B104A3FBCD-1832-000000EF7AE0DE69.mp4

iPhone video may not play on all devices?

Removing aux belt stops the noise, it's only ever there for a minute or so
On cold starts. Seems to be coming from the ac pump.

I have replaced

Aux belt
Pas pump
Idler pulley

All bolts are tight on various pulley wheels

Turning ac on and off makes no odds.

Spraying silicon lube on the belt stops the noise for a while.

Annoying thing is, every time I touch the belt the noise stops for a while. Thinking its fixed after each bit of work done mentioned above.

It always comes back after a couple if days.


Short of re gas or new/other pump, I don't know what else to try.

[amba]

Have the same problem ,here although mine is a M/F circa 1998.

On cold start very definite noise which also seems to be coming from A/C pump but only for 30/40 seconds and then clears.Has been doing it now for several months and sound is very metalic.

Solution for me was every night when pull car onto driveway switch of A/C so when started again next day A/C is off until engine has run for minute or so ,then switch it on and noise is no longer evident.

Assume it must be just down to the cold on the belt /metal/bearings etc...but does sound nasty when starting up

[Strangechap]

Mine makes that noise too.

Goes away while I rev it a bit, then disappears in a couple of minutes or so.

I'm ignoring it until it breaks! You can spend huge amounts of time and money chasing noises on cars, both of which are are short supply for me these days!

[Kevin Wood]

Was the air con running or in ECO mode? Does it make a difference?

If the air con wasn't running, probably just the compressor clutch rattling a bit. Probably not worth worrying about at this stage. If air con was on, then might be a more serious issue with the compressor.

Having said that, the fact it disappears with some lube on the belt and as it warms up makes me think it could just be the belt slipping a little. Difficult to tell from the sound, but the belt will warm up and get more supple after a few minutes. 

Load on the belt will also be heavy to start with as it's charging the battery heavily.

[feeutfo]

My concern is belt slip caused by a stiff aux pulley, i.e. the ac pump. Is it about go seize? It's never been re gassed afaik, so could it be low on oil if the gas is low too? Even though the ac still works well. It does sound like belt slip IMO.

Eco was off in the video. I did try starting with Eco on (ac off) and it didn't make any odds. But I wll try it again to be sure.


...or could the tensioner be week?

[Kevin Wood]

I would say that if the air con is cooling there'll be little wrong with it. The refrigerant is much, much less dense than the oil so if anything is going to leak out that will go first. If it squeaks in ECO mode too, then air con is out of the picture anyway. I don't think it's anything to worry about, TBH.

[feeutfo]

It's annoying. That's all at the moment.

There was a point in the spring where some green die was seen on the bottom of the ac pump. This has now gone and not returned. Maybe lack of use since going through the winter. Although, I never use eco mode.


Thinking about it, is green die oe? Or would the die indicate a re gas?

[henryd]

I think the AC clutch only engages after the engine has been running for about half a minute or so,it won't be engaged on start up as the horsepower required to drive it would soon bugger the starter motor,if you get someone to start it cold while you watch you will see when the clutch engages and if it coincides with the noise dissapearing

[dbug]

Had this on the Elite Estate - result was the a/c compressor bearing seized resulting in being unable to turn engine over on the starter.  As I was selling it, removed aux belt and fitted a 2 lit (with a/c) belt bypassing compressor (Vx dealer seemed unable to find correct V6 belt so I asked for the 2 lit belt which was in stock - same part no. as V6 no a/c belt  )

Might be prudent to carry a 2 lit belt if you are going to continue to use it.

[dbug]

It's annoying. That's all at the moment.

There was a point in the spring where some green die was seen on the bottom of the ac pump. This has now gone and not returned. Maybe lack of use since going through the winter. Although, I never use eco mode.


Thinking about it, is green die oe? Or would the die indicate a re gas?

No it indicates a leak!!  Illegal to regass a leaking a/c system.

[feeutfo]

It's annoying. That's all at the moment.

There was a point in the spring where some green die was seen on the bottom of the ac pump. This has now gone and not returned. Maybe lack of use since going through the winter. Although, I never use eco mode.


Thinking about it, is green die oe? Or would the die indicate a re gas?

No it indicates a leak!!  Illegal to regass a leaking a/c system.

well yes, apart from that

[TheBoy]

Does noise return if you turn eco on?

I had a noise on the bullet, was the clutch. Changed compressor (twice) in the end, but for other reasons

[Andy H]

Mine is doing the same

I thought it might be the cambelt tensioners initially and was disappointed that the noise carried on after the last cambelt change.

Next thing I changed was the auxiliary belt tensioner pulley, that made no difference.

Next was the water pump, still no change

I am at a loss, it sounds higher up and nearer to the centre than the A/C compressor.

It sounds like a fractured/loose metal bracket top suspect is exhaust gaskets at the moment, I can't think of anything else that would warm up (and shut up) so soon after a cold start (and not come back till the next cold start)

[VXL V6]

Apparently it's quite common to see a little bit of the green die on the underside of the AC compressor according to Sassanach. Certainly seen it on the one on my V6, not seen it on the diesel one as it's covered in shite rather dirty

[feeutfo]

Mine is doing the same

I thought it might be the cambelt tensioners initially and was disappointed that the noise carried on after the last cambelt change.

Next thing I changed was the auxiliary belt tensioner pulley, that made no difference.

Next was the water pump, still no change

I am at a loss, it sounds higher up and nearer to the centre than the A/C compressor.

It sounds like a fractured/loose metal bracket top suspect is exhaust gaskets at the moment, I can't think of anything else that would warm up (and shut up) so soon after a cold start (and not come back till the next cold start)

running with aux belt temporaily removed should isolate engine from aux run noises...?