Cwest

It's more of a basic understanding not to be exact.

lcc014

Still, photos in this post for N62 is not the same as in video. Reader will be confused when trying to do the N62 belt change. BavaAuto should post another video for N62 engine. That one was too generic ..... even for M54 engine belts change.

ck-e60

yeah FYI, N62 does not have an A/C belt tensioner, this is fastened to the main pulley with some special tool. I made a mistake and cut off my A/C belt, thinking it was easy to replace. NOPE, sure was wrong, I haven't had a chance to fabricate my own "special tool" to get the new one back on. EVERYONE, DO NOT CUT OFF YOUR A/C BELT, IT IS A B*TCH TO PUT BACK ON!!!

turboawd

someone on this forum made a tool out of a mini pipe cutter. was pretty cool.

rctmthouse

Does anyone know how to loosen the tensioner after I loosened the bolt, the 16 mm in the diagram. I loosened the bolt more than halfway out but was not able to loosen the tensioner so I stopped because I didn't want all the parts to fly out if I keep untighten it, especially the spring.

turboawd

you have to remove the belt first. the tensioner is always spring loaded.....cant loosen it.
insert the torx into the tensioner, twist the tensioner enough to let you slip the belt off, then slowly release the tensioner. then remove the hold down bolt and take out the tensioner.

Rizbel

This is on an E46 so use appropriate tool size, it also may or may not apply to E60.Use a drill bit and insert into the aligned holes to lock the spring loaded tensioner in place,
there's no need for a special tool for this. Thanks go to Pelican Parts DIY article.

BMW TIS Replacing Alternator Drive Belt.

rctmthouse

Thanks, following this method I was able to remove the belt. Just for future reference, I do not see any pin slot for the e60 550 engine. Just loosen the tensioner with the T60 enough to remove the belt and it automatically retighten, due to the spring I guess. I assume later on I will need to do the same method to put the belt back.

turboawd

yeah, when reinstalling the belt, get it mostly on, and then loosen the tensioner to put slip the rest on. on certain replacement tensioners, there is a pin that temporarily holds it in the loose position.

rctmthouse

thanks Turbo...I thought it was strange when I removed the old tennsioner and didn't see the pin. I assume the pin has to be removed in order to get the belt tighten?

Just got home from the dealer's part department. The tensioner cost me 120+ but got a 10% discount so around 110 + tax. A little bit cheaper online but don't have time to wait for it to be shipped. Hopefully this will resolve the weird loud noise with my engine.

If you have time, please take a look at my thread in the discussion forum and tell me what you think of that noise. I know for sure my tensioner pulley is worn out but the I just can't see a bad tensioner causing that sound though.

Anyway, thank you for your time.

Richard