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Old 09-03-2021   #1
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Panda 1.2 Dynamic 2006 Engine Whine

Hi all, first post. I've been lurking for a while and picked up lots of tips, we've had the Panda for nearly three years and she's done us well.

I changed the cambelt and water pump last summer. It may not be related but a few months later, I get a distinctive whining noise from the engine which is very intermittent. It rises and falls with revs, makes no difference with aircon on/off or clutch. It's obvious when idling but gets drowned out by road noise at speed.

It comes and goes and never appears long enough for me to check out more fully. After staying away for a few weeks it's just come back over the last 48 hours, kicking in in the middle of a journey.

I managed to record it (attached). It's slightly muffled from the driver's seat, but may help point someone diagnose it. I'm thinking alternator, aux belt tensioner or perhaps water pump (which has been replaced, as above).

Grateful for any other thoughts on what it could be. Sounds almost like rubbing but I think that's unlikely because it comes and goes.

-j
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File Type: zip panda_whine.zip (200.2 KB, 14 views)
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Old 09-03-2021   #2
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Re: Panda 1.2 Dynamic 2006 Engine Whine

record from different location see where its the loudest

disconnect the aux belt would eliminate or narrow it to compressor, alternator or idler.
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Old 10-03-2021   #3
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Re: Panda 1.2 Dynamic 2006 Engine Whine

Thanks, I'll try removing the aux belt next, prob on the weekend if the noise is still there then.

-j
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Old 12-03-2021   #4
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Re: Panda 1.2 Dynamic 2006 Engine Whine

Take the top cover off the cambelt see if the noise get louder?
Could be a bad cambelt tensioner would would be bad news obviously
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Old 12-03-2021   #5
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Re: Panda 1.2 Dynamic 2006 Engine Whine

Long screwdriver. Press the tip adjacent to anything you want to listen to. Press the handle under your ear lobe. You will hear the whirr/rattle/hum via bone conduction.
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Old 13-03-2021   #6
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Re: Panda 1.2 Dynamic 2006 Engine Whine

Thanks all, the noise has gone now it's the weekend

Will wait til next time it shows up
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Old 13-03-2021   #7
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Re: Panda 1.2 Dynamic 2006 Engine Whine

Hi all

I think Gman had similar noises from a 1.1 last year including a video/noise bite(or what ever they are).

could be worth a search for as it may be the same screech noise and shows his results.

Tim
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Old 13-03-2021   #8
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Re: Panda 1.2 Dynamic 2006 Engine Whine

Hi All

i would probably check the alternator bearings as a first check.

Tim
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Old 14-09-2021   #9
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Re: Panda 1.2 Dynamic 2006 Engine Whine

Cam belt tension too tight.
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Old 15-09-2021   #10
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Re: Panda 1.2 Dynamic 2006 Engine Whine

Pull the aux belt off anyway and feel the alternator bearings. They get worn and rumble but alternators can also get corroded until the rotor itself rubs. Sooner or later either of these will have it seize up.

If nothing can be found then you'll have to check the cam belt tension is correct.

This is for the 500 with air-con but the engine bay and scuttle area is the same as 169 Panda. On this video the alternator has cracked. It happens when the stator core corrodes as swells up. The generator will usually work until the belt snaps or the engine wont start due to load on the starter.

https://www.youtube.com/watch?v=Ckhp1lsF44E
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Last edited by DaveMcT; 15-09-2021 at 14:45.
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