Having problems with your BMW 525 ?

My fan belt on my bmw 525 td keeps cumming off nd i dont now haw to put it on and keep it tight eney ansers pleez

Posted / edited by AnonymousUser on : 26-02-2018

Answers :

The fan/serpentine belt is usually held tight with either spring loaded tension or the pressure put on it by the alternator. If it's the the spring loaded tensioner it has to be pressing against the outside of the belt to keep it tight as it passes around the pulleys.
If it's the alternator that keeps the belt tight, you'll need to find the bolt holding the alternator, usually the top side of the unit. You will notice a curved opening where the bolt passes through, loosen the bolt and keeping the belt tight pull the alternator out away from the engine to put pressure on the belt. Tighten the bolt and check the belt's tension by pressing on it with your finger it should only move slightly, usually less than half an inch. It is important to check the tension after it runs for some time to make certain the belt hasn't slipped or stretched, some stretching is normal as it heats up. If the belt is too tight it can damage the alternator or other parts. A repair manual is also available at the auto parts store to assist you in the procedure average cost 20 to 50 dollars depending on the brand Haynes or Chilton. Hope this helps, good luck
Repair Help & Product Troubleshooting for BMW 525

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