5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
I think/hope it's the belt slipping when the pump is under max load. If the belt looks at all worn get it changed. (Small fine cracks at 90 degrees to the grooves on the inner surface are ok)... but any damage to the outer, or running along the grooves means you need a new one. Of course you may just need the tensioner adjusting. Get the tensioner pulleys checked for wear if you are doing a belt change..... lost one of mine recently.... new rad!
The mechanic confirmed the noise is due to the belt tensioner that need to be changed & hence I replaced it, but the noise is still there!!! I am planning to take it to him again in the coming weekend. Any idea on what is the next possibility?
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