525i Belt Tensioner

1952 BMW 525
Avatar
JNOWAK
  • MEMBER
  • 1 POST
I am in process of replacing alternator on 2002 525i. I have the old one out but did it working around the main belt which is still very tight. I don't imagine I can squeeze the new alternator in without learning where and how the belt tensioner is and works. Can someone adivse?
Aug 12, 2007 at 3:09 AM
Advertisement
Avatar
DOCHAGERTY
  • ✓Experienced Mechanic
  • 9,606 POSTS
there is a tensioner and a deflection pulley on that model.they are black and have covers that pop off. you state that you replaced the alternator already so you have already popped the cap off the deflection pulley to access one of the mounting bolts, now the other pulley that is very similar in appearance is the tensioner pulley. pop the cap off that and use the bolt holding that pulley to turn the tensioner and you will be able to reinstall the belt.(turn the bolt to the right) hope this helps you
Aug 12, 2007 at 6:46 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle