Question about 1997 BMW 318

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1995 318ti My car have a rattling noise on the fan belt that is connected to the engine and air conditioning I think. The sound is getting worse. Is this only an adjustment or tightening on the belts? What tool should I use and how tight should it be?

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HI there,
Your car is fitted with one very long belt which we call serpentine. Actually you cant adjust this belt as it has an automatic tensionner.
Try this, pour a little bit of water on the belt while the engine is running. If the noise stops then you know it's the belt which is noisy. If this is the case, a replacement of the belt is advised.
If not it means that probably the A/C compressor or the tensionner is faulty.

Posted on Aug 24, 2008

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