THE LARGEST BMW 2-SERIES FORUM ON THE PLANET
2Addicts
2Addicts
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
2Addicts | BMW 2-Series forum BMW 2 Series (F22) Forum BMW 2 Series Coupe and Cabriolet (F22/F23) General Forum 2016 M235 Belt Tensioner /Engine Sound

Post Reply
 
Thread Tools Search this Thread
      01-22-2023, 11:41 AM   #1
USVIJIM
Enlisted Member
United_States
14
Rep
48
Posts

Drives: 2016 M235i
Join Date: Jun 2022
Location: Long Beach, CA

iTrader: (0)

2016 M235 Belt Tensioner /Engine Sound

I replaced the accessory belt, tensioner and idler pulley 4000 miles ago. Changed my oil yesterday and car sounded crappy to my ear. Tensioner seems to be moving quite a bit from when I initially installed. Thinking I can check torque? I did it to spec in Aug. Any advice appreciated. Let me know if I need to link the video differently

https://www.reddit.com/r/BMW/comment...t=share_button
Appreciate 1
mecheng771005.00
      01-22-2023, 04:40 PM   #2
USVIJIM
Enlisted Member
United_States
14
Rep
48
Posts

Drives: 2016 M235i
Join Date: Jun 2022
Location: Long Beach, CA

iTrader: (0)

Added a longer video of issues, will post on the maintenance sub as well. I can remove this one if mods say so

Appreciate 0
      01-23-2023, 12:10 PM   #3
XutvJet
Major General
5488
Rep
5,336
Posts

Drives: 2011 Cayman Base, 2016 M235
Join Date: Mar 2016
Location: Kansas City

iTrader: (-1)

Normal. The spring-loaded tensioner is designed to move a bit and when the A/C is engaged, it moves far more because of the increase drag of the A/C compressor. Turn the A/C on an off and watch how much more the tensioner arm moves. My original tensioner moved and I replaced it at 60K miles. The replacement tensioner moved just as much 500 miles later.

When the tensioner arm is really moving around wildly is when it should be replaced.

Unless the torque on the tensioner bolts were crazy loose, it's not going to influence tensioner arm movement.

The sound you noted doesn't appear concerning either. My alternator has always had a bit of whine to it with the hood up.
__________________
The forest was shrinking, but the Trees kept voting for the Axe, for the Axe was clever and convinced the Trees that because his handle was made of wood, he was one of them.
Appreciate 0
      01-23-2023, 12:31 PM   #4
USVIJIM
Enlisted Member
United_States
14
Rep
48
Posts

Drives: 2016 M235i
Join Date: Jun 2022
Location: Long Beach, CA

iTrader: (0)

Thanks, makes me feel better. Bolts were still same torque. Car drives the same no power loss and no loss of AC cooling. Minimal movement now, that sound was probably there all along and I never noticed.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 08:20 PM.




2addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST