[BashShah]

Can someone look up what is the Torque Values of the Tensioner and Idle Pulley on my car?

2012 335i Sedan - Sports Package.

Thank you in advance.

[John in VA]

Check the TIS - the torque values are usually there. Good luck!:
https://www.newtis.info/tisv2/a/en/

[BashShah]

John, Thank for that link, it is truly invaluable.

I found one of the Torque specs but could not find the torque spec of the idle Pulley.
This Page, I am not sure which one it is:
https://www.newtis.info/tisv2/a/en/f...ement/Am2J4Uy8

If someone could clarify this please?

Thanks in advance.

[Billfitz]

Often it's a matter of knowing how BMW refers to the part. For that use this:
http://www.realoem.com/bmw/

[BashShah]

Originally Posted by Billfitz

Often it's a matter of knowing how BMW refers to the part. For that use this:
http://www.realoem.com/bmw/

This is a Good way to look at it, but I cannot find this E-Bolt anywhere on any diagram.

I wrote a DIY for the N54, with both Upper and lower Pulleys but for the F30 with N55 I cannot find the Idle Pulley torque spec anywhere.

someone has to know what kind of E-Bolt it is?

[Orion4]

The idler pulley is also referred to a deflection pulley as shown in Realoem
Deflection pulley PN: 11288673720 and according to the TIS link it should be torqued to 60 Nm

[BashShah]

Originally Posted by Orion4

The idler pulley is also referred to a deflection pulley as shown in Realoem
Deflection pulley PN: 11288673720 and according to the TIS link it should be torqued to 60 Nm

Do you feel that 60nm is pretty high?

Like compared to 38 for the tensioner.
I am just surprised and in doubt.

[Orion4]

That's what the TIS states (60nm or 44ftlbs) and what i torqued mine to when installed both a new tensioner and Idler pulley. No issues in more than a year since installed.

[BashShah]

Originally Posted by Orion4

That's what the TIS states (60nm or 44ftlbs) and what i torqued mine to when installed both a new tensioner and Idler pulley. No issues in more than a year since installed.

yup you are right.
60nm for the Idle Pulley.

Also the I had to reuse the Steel Tensioner E-Bolt.
Called ECS Tuning and they stated that it is steel and can be reused.

But a few issues I had disappeared upon replacing belt, tensioner and Idle Pulley.
1) I had a engine knock noise at low RPM as I accelerated in Moderate Mode.
guess the tensioner was causing this. It was shaking at idle. seen a video on it.
2) My Old belt must have Shrank or something, cause it was a pain to take off, even with the tension fully released.
3) I had a Engine noise, from the belt revolution for the longest time, and it honestly sounded like it was internal to the engine but wow, now my car humms.

Thank you every one.
Bash Shah

[Orion4]

Great that appears to have solved several of your issues. It's one of those items that can be forgotten about until too late. With the long life of the new generation of belts, it is probably a good time to change the tensioner and Idler pulley when changing the belt. Do as a kit.

[BashShah]

Originally Posted by Orion4

Great that appears to have solved several of your issues. It's one of those items that can be forgotten about until too late. With the long life of the new generation of belts, it is probably a good time to change the tensioner and Idler pulley when changing the belt. Do as a kit.

After reading quite a few posts on the belt Tensioner and Pulley issues.
I agree with your statement.
also, one Post stated, that this to be performed every 50K Miles....hmmmm