Quote:
Originally Posted by Pig Farmer
I’m pretty sure those are 13mm M10 bolts which are torqued to 42 Nm.
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Quote:
Originally Posted by frankc
Just to avoid the over-torquing of tensioner bolts 1 and 2 and possibly damaging the block, they are silver zinc (ZNS) M8 8.8, not M10. The torque spec for M8 8.8 ZNS is 19NM per TIS:
[edit] I was installing this tensioner today and noticed that bolt #1 was M8 10.9, not 8.8. Bolt #2 is M8 8.8. I used the 8.8 spec for for both (19Nm)
https://www.newtis.info/tisv2/a/en/e...ations/5gDQK89
The bolt for the power steering & A/C deflection pulley is an M10 and requires special torque as specified in TIS:
https://www.newtis.info/tisv2/a/en/e...lement/5yhnA2X |
Bumping an old thread but I will be replacing my belt tensioner assembly (part no. 11287838194) and drive belt tensioner (part no. 11287841546) tomorrow, and if I understand all the info above the correct torque values for each bolt are:
Bolt 1: M8 10.9 - 42Nm
Bolt 2: M8 8.8 - 19Nm
Just wanting to confirm in case anything has changed or different info has become available in the past few years as google seems to give me the torque values below:
M8 10.9 - 34 Nm
M8 8.8 - 24 Nm
Quote:
Originally Posted by Theodore
For those times when you just want the damn torque spec! Click the underlined links for additional DIY help.
Belt Tensioner Machine Screws (machine screws on either side of belt tensioners, both belt tensioners) - 40NM (30 ft lb) Note: BMW TIS for E9X M3 does not specifically speak to the torque requirement for this machine screw, refer to generic BMW standard for M8 course thread 10.9 strength bolts/machine screws to get this torque
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https://www.m3post.com/forums/showthread.php?p=25189924
And this thread is giving me a value of 40Nm