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I decided to try to determine what the strange high pitched whine is coming from my cars engine bay today, which has appeared over the last couple of weeks. I'm not sure if its the cam belt, alternator belt or what, but whatever it is it doesn't sound right. The cam belt was changed 2 months ago along with the water pump so I dont think its that, its definitely not the engine bay cooling fan as i checked it and it wasn't even running. I have tried to spray some lubrication over the alternator belt but that didnt seem to affect it at all so im getting a bit stumped.

You can hear it best at about 30 seconds into the video and it seems to mainly go away by the end of the video. Any one encountered this before?

http://www.youtube.com/watch?v=b36rjtLPWFU&feature=youtu.be
 

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I decided to try to determine what the strange high pitched whine is coming from my cars engine bay today, which has appeared over the last couple of weeks. I'm not sure if its the cam belt, alternator belt or what, but whatever it is it doesn't sound right. The cam belt was changed 2 months ago along with the water pump so I dont think its that, its definitely not the engine bay cooling fan as i checked it and it wasn't even running. I have tried to spray some lubrication over the alternator belt but that didnt seem to affect it at all so im getting a bit stumped.

You can hear it best at about 30 seconds into the video and it seems to mainly go away by the end of the video. Any one encountered this before?

http://www.youtube.com/watch?v=b36rjtLPWFU&feature=youtu.be
I dont know enough about engine bay whines to be able to say what it is, no doubt someone will be along shortly to help but if your worried and still have light you could try opening up the cam cover, something like 5 bolts, and get a long screwdriver (or a spanner which is what i used) and put one end to your ear and the other where you think the noise is coming from. The sound will be amplified and at least help you find out where in the engine its coming from.
 

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was the engine cold when you begun that video? stone cold?

My first thought was a vacuum leak, from my £5 earphones. but then the pitch changed, and as you said stopped.

58seconds into the video... got very loud as you entered the wheels arch. stick your head closer to that. :)
Alternator, water pumps, and accosiated belts r on that side. . .
 

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Discussion Starter #5
was the engine cold when you begun that video? stone cold?

My first thought was a vacuum leak, from my £5 earphones. but then the pitch changed, and as you said stopped.

58seconds into the video... got very loud as you entered the wheels arch. stick your head closer to that. :)
Alternator, water pumps, and accosiated belts r on that side. . .
I'd been driving around a couple of hours prior to that video so no it wasn't stone cold. I have just been and had a second listen though and it appears I have two strange noises. One is like a constant whistling sound a bit like a camping kettle but no where near as loud. The second is the weird louder sound that changes pitch. On second listen the 1st sound is more or less there all the time from what i can tell so you could well be right when you say a vacuum leak, I guess i will need to have the cover off for a proper inspection on that one. The second sound seems to come from under the wheel arch so must be belt related, i gave the alternator belt a good soaking and the sound stayed the same so that leads me to think that it must be the cam belt. Seems a bit strange though...
 

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It doesn't necessarily have to be a belt, it could be the bearing of something being driven off the belt i.e. alternator, water pump or cam belt tensioner.
 

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try taking off your cam belt and then starting the engine. if the noise stops you know it was the belt.


...
no, no dont do that. i just wanted to suggest it for fun.


i do agree with an earlier post get the inspection cover off, and get your head in the 'bay. then remove cam covers / etc as required to isolate the source(s).


Actually iv just listened to the video again.

try this: turn on your radio, lights, wipers, heater on full and then roll down both windows. see if that initiates, or stops, the noise from the engine. By doing this your arse putting more load on the alternator. could flag up a problem in that area.

also, i didnt see your VVC mech in that video. Im assuming this is a 135 model?
 

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Discussion Starter #8
It doesn't necessarily have to be a belt, it could be the bearing of something being driven off the belt i.e. alternator, water pump or cam belt tensioner.
I suppose thats true, although both the tensioner and water pump are new parts so they should be safe, could be the alternator bearing though.

Ive just been looking at a how to for a cam belt change to see how easy it is to get the cover off and have a good look inside. One chap mentioned that the cam belt should twist 90 degrees and if it doesn't then its too tight. I'll investigate the alternator first though as i suspect that will be easier. I am a bit worried that the garage who did the cam belt have put it on too tight and it could be putting a strain on the water pump, why is nothing ever easy!
 

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Discussion Starter #9
try taking off your cam belt and then starting the engine. if the noise stops you know it was the belt.
Too late...:hgf:



:facepalm:








try this: turn on your radio, lights, wipers, heater on full and then roll down both windows. see if that initiates, or stops, the noise from the engine. By doing this your arse putting more load on the alternator. could flag up a problem in that area.
Will give that a try now, although i dont see wht my arse has got to do with it... :moon:

also, i didnt see your VVC mech in that video. Im assuming this is a 135 model?
Yep its a 135 :)
 

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Discussion Starter #13
try this: turn on your radio, lights, wipers, heater on full and then roll down both windows. see if that initiates, or stops, the noise from the engine. By doing this your arse putting more load on the alternator. could flag up a problem in that area.
Tried this but no difference.

Remove the alternator belt an see if it has stopped. If its still there you know it's not that.
Yep this will be the next thing to try tomorrow when theres more light.

Cheers
 

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Discussion Starter #14
UPDATE:

I had the alternator belt completely off today and tried the engine again, the whine is still there so at least the alternator bearing and belt are both ruled out. Although worryingly this is looking more and more like the cam belt or water pump bearing... I'll be on the phone first thing tomorrow to see if the garage who fitted the cam belt can check it over.

The next problem ive run into is that the alternator belt tensioning bolt YYP100530 is completely missing so now I cant get the alternator belt on tight enough to feel safe driving around :( having done a bit of research it looks like its an M6 x 90mm bolt so ill try and find one locally tomorrow but its going to be hard to pick it up without a car! Something else for me to take up with the garage as they must of done the alternator belt when they did the cam belt.
 

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Sounds like it could be the cambelt tensioner...

Do not drive the car until it's changed. If that goes, then it gets very expensive.
 

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Discussion Starter #16
Sounds like it could be the cambelt tensioner...

Do not drive the car until it's changed. If that goes, then it gets very expensive.
Thats what im worried about and the garage who did the cam belt is about a 30 minute drive away.. Is it something I can do myself? Ive never attempted a cam belt change before
 

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Discussion Starter #17
It doesn't look to hard from what Ive just seen. I just need a cam locking tool and a new auto tensioner, anyone changed the tensioner without changing the belt before?
 

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For the sake of a few quid I would change the belt as I'm there working on that area but if it has been replaced in the last 6 months then I wouldn't worry to much

Sent from my ST25i using Tapatalk 2
 

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Thats what im worried about and the garage who did the cam belt is about a 30 minute drive away.. Is it something I can do myself? Ive never attempted a cam belt change before
Unless you really don't like that garage, why not make the phonecall? If, as I think you said up the thread something is missing....
 

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Aha! I've experienced this exact noise before (the kettle noise), both with my ex Rover 45 and the TF, and only really when cold. It's the oil filter. No really! Trust me on this.

I was baffled for months about the noise on the Rover, and I had a listen with the screwdriver against my ear underneath the car, landed it on the oil filter and it was that! Obviously was completely full or faulty, and there was some sort of pressure relief whining. Changed the filter and it was fine ever since.

I then got the TF (I'm a new TF owner by the way and loving it), which hadn't been serviced for ages as it turned out, which was making the exact same noise. Changed the three year old oil filter and all was fine.

Sounds mad, but before you do anything, just do an oil and filter change and that loud whining kettle noise you hear in the video should dissapear.
 
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