[QUiKSR20]

Just hit 80k miles on my 2013 F30 N20, Going to replace the serpentine belt and tensioner this weekend. Anyone know the torque specs for the 3 bolts that hodl the tensioner to the block?

Searched the forums and also online and cannot find anything anywhere, Was trying not to make a post for something so basic but I cannot find it.

For the N54 I think I read 18ft lbs then a right angle more but cannot confirm this is the same for the N20.



Thanks!

[Orion4]

According to the Bentley's manual:

[QUiKSR20]

Originally Posted by Orion4

According to the Bentley's manual:

14ft lbs, You rock man I really appreciate it... This is just what I was looking for, It says N55 but im pretty sure aside from 2 extra cylinders the N20 is basically the same engine.

[Orion4]

This is the section for the N20 & N26 engine. The section below that starts the N55 section.

[QUiKSR20]

Originally Posted by Orion4

This is the section for the N20 & N26 engine. The section below that starts the N55 section.

Thanks for clarifying, really appreciate it..

[spitpilot]

Originally Posted by QUiKSR20

Just hit 80k miles on my 2013 F30 N20, Going to replace the serpentine belt and tensioner this weekend. Anyone know the torque specs for the 3 bolts that hodl the tensioner to the block?

Searched the forums and also online and cannot find anything anywhere, Was trying not to make a post for something so basic but I cannot find it.

For the N54 I think I read 18ft lbs then a right angle more but cannot confirm this is the same for the N20.



Thanks!

here's the BMW spec for your vehicle...

11 28 Drive belt with belt tensioner and deflecting element
Tightening Torques
Type Thread Tightening specifications Torque
1AZ Belt tensioner with deflection pulley to crankcase
B46M0/O0 / B48M0/O0 M10 30 Nm
2AZ Belt tensioner to alternator
B46M0/O0 / B48M0/O0 M8 22 Nm
3AZ Deflecting element to belt tensioner
B46M0/O0 / B48M0/O0 M8 20 Nm

[Orion4]

Originally Posted by spitpilot

here's the BMW spec for your vehicle...

11 28 Drive belt with belt tensioner and deflecting element
Tightening Torques
Type Thread Tightening specifications Torque
1AZ Belt tensioner with deflection pulley to crankcase
B46M0/O0 / B48M0/O0 M10 30 Nm
2AZ Belt tensioner to alternator
B46M0/O0 / B48M0/O0 M8 22 Nm
3AZ Deflecting element to belt tensioner
B46M0/O0 / B48M0/O0 M8 20 Nm

Interesting in that those numbers are significantly different than the Bentley's for the N20 engine. (9Nm/14lbs)

[QUiKSR20]

Thanks everyone, Was going to do this weekend but its freezing out.

[CarlosC]

Originally Posted by QUiKSR20

Thanks everyone, Was going to do this weekend but its freezing out.

I need to do this too... would appreciate if you could post back your replacement process and any issues you run into.

[loggin]

Originally Posted by Jrboulder

Anyone else notice that 9 Nm is only about 6.6 ft-lbs?

Yes.. Looks like they forgot to put a 1 in front of the 9 nm. in the Bentley manual for it to be 14 ft. lb.