F30 N55B30 Idler Pulley part Spec, Torque Spec - Bimmerfest - BMW Forums



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Old 06-15-2019, 11:42 AM
2011x5 2011x5 is offline
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F30 N55B30 Idler Pulley part Spec, Torque Spec

Hi,

2012 335i F30, N55B30 engine, 4-door sedan.

I changed the serpentine belt few months ago and an occasional squeak noise started after that, became more noticeable recently. The tensioner had been replaced 6 months ago at dealer under warranty, so I think likely the defection/idler pulleys are the trouble makers.

There are 2 idler pulleys, upper and lower. Are they the same part #11288673720?
https://www.fcpeuro.com/products/bmw...673720#fitment

In addition, what is the torque spec on these idler pulleys? I recall that E46's idler pulley is 40Nm, but not sure about F30's.

Thanks in advance,

Nick
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