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E87 Whine on acceleration

Jeags

By Jeags,
in BMW 1 Series Forum

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Jeags Apprentice

Jeags

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Hi all,

Got a whine coming from the engine that has gotten progressively worse. Sounds a bit like a bearing or pulley to me but not certain. Has anyone else had a similar noise before? Wondering whether it's the water pump? See attached for audio. Cheers,

https://youtube.com/shorts/KHTM0gDOtsE?si=51zJJtmQjtydZNaD

Joe

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Greydog Grand Master

Greydog

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Morning Joe

When was the car last serviced ? Did they change drive belts ? At higher mileages I would change change Belts and Tensioners, plus while your in there with no belt in the way check the alternator water pump and aircon pump pulleys 

Certainly sounds like a pulley

Good Luck

Dave

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Jeags Apprentice

Jeags

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Morning Dave,

Serviced last in February. Had oil, coolant and brake fluid change. As of the belts and pulleys there's nothing in service history. The auxiliary belt does show signs of slight cracking, I've bought a new belt and water pump to do the job but wanted to try and source the noise so I can fix that while the car is in bits. Any suggestions on what pulleys I need? Wanted to try and replace only the worn ones but not a clue how many/which ones need changing.

Cheers,

Joe

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Greydog Grand Master

Greydog

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Hi Joe

Take a look at www.realoem.com if memory serves there is a deflection pulley and a tension pulley. The deflection pulley I think is plastic so could well be your culprit

Try a squirt of WD40 on the centre of each pulley (do it 1 at a time) if it stops the noise you know which it is

Dave

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  • 6 months later...
Jeags Apprentice

Jeags

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Been a while, forgot to update sorry. Turned out to be the belt tensioner pulley at fault, bearing was goosed. Hope this helps some people.

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  • 1 month later...
nickragdoll Newbie

nickragdoll

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On 5/3/2024 at 12:51 PM, Jeags said:

Been a while, forgot to update sorry. Turned out to be the belt tensioner pulley at fault, bearing was goosed. Hope this helps some people.

Hi, my e87 118d msport making the exact same noise, was this an easy repair?? I'm quite handy with a spanner. . Cheers. 

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Greydog Grand Master

Greydog

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Morning Nick

Welcome to the Forum

Check www.realoem.com put the last 7 Digits of your Vin in the search box then search the engine section to find where it is 

Then take a look at the car to see what is in the way (how much stuff needs removing) then if your happy crack on. Use the part number from realoem to get the parts needed 

Good luck

Dave

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Jeags Apprentice

Jeags

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On 6/16/2024 at 2:14 PM, nickragdoll said:

Hi, my e87 118d msport making the exact same noise, was this an easy repair?? I'm quite handy with a spanner. . Cheers. 

Fairly easy for me with limited knowledge. Took and hour or 2 at most. Changed the belt whilst there, if you do make sure it's the right length as there are a few types depending on accessories such as a/c. Once the belt was off you can spin each pulley and locate the bad one. In my case it was one of the tensioners.

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