E46 318 Engine Squeal Advice
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  1. #1

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    Question Engine Squeal Advice

    Hi,

    First post and sadly it is one that requires some assistance. I have purchased my first BMW yesterday (2000 318i Se).

    Before purchasing the car I took it for a small road test and it drove perfectly. Brought the car home yesterday and immediately set upon visiting the folks however the car has already developed some sort of squeal under the engine. Any help would be greatly appreciated and I will try to get a video so you can hear the problem. My first guess is a pulley issue and looking around on the internet it seems this car suffers from this a lot however it seems a little intermittent! So...

    • The squeal does not happen immediately and it can go a few miles before it happens.
    • The squeal will continue indefinitely but will go when the accelerator is pressed but as soon as you let off or hold it the noise comes back.
    • Everything else on the car runs smoothly and there are no warning lights.


    If you have any further questions please let me know and as mentioned, any advice would be greatly appreciated. (Especially as its a bank holiday Monday)

  2. #2
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    Could well be from the drive belt, does the belt look worn?

    You will need to remove the belt and check it out and the tensioner, pulleys and guide wheels.

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  3. #3

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    Quote Originally Posted by Ronnie View Post
    Could well be from the drive belt, does the belt look worn?

    You will need to remove the belt and check it out and the tensioner, pulleys and guide wheels.

    Sent from my GT-I9505 using Tapatalk 2
    Thanks for the reply Ronnie.

    Unfortunately I am not great with mechanics and also do not own any tools. Below are some images I have just taken, I am sure they make more sense to you. It is very clear to me that they look a little bit rusted in fact which may be the cause as the belts look OK to me?

    Do you have an estimate on the cost of replacing and fitting a new set of pulleys/belts?


  4. #4
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    The belt tensioner complete with pulley is 89.
    The belt is 33. That is if it is indeed those.
    Both from the main dealer, although our forum vendor will be able to offer you a discount.
    You'll need to diagnose the issue first or have a garage do it. If you can get your hands on a 16/17 mm spanner then you could remove the belt and check the pulleys yourself.
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  5. #5
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    Get a can of WD40 or similar with the little straw in the nozzle, then spray a small amount into the tensioner wheel, if the sound goes the you've found the problem, could likewise be the waterpump or alternator mind! WD40 should stop the squealing though once you spray it on the culprit!

    Just be careful not to get your fingers or clothing tangled up in the belt!


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    When I first read that I thought you meant put it between the belt and the pulleys, which seems like a very bad idea, so to clarify you mean aim for whatever the pulley spins on and keep the WD off the belt yes?

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    Quote Originally Posted by nutter426 View Post
    When I first read that I thought you meant put it between the belt and the pulleys, which seems like a very bad idea, so to clarify you mean aim for whatever the pulley spins on and keep the WD off the belt yes?
    Obviously smart guy! Hence why I said to use the little straw that comes with the can!


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