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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > 328i Belt Tensioner Defect?



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      09-25-2013, 08:41 AM   #23
fe1ixs
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belt tensioner

I just replaced my belt tensioner yesterday. mine was way off and the tech said can be anytime that the belt will completely off the pulley. BMW 328i E90 2008 with 65K miles. total cost $260. He said this is manufacturer issue. the replacement part is the same as the original so I should expect another replacement in the future. Btw, I highly recommended Brian autoworks at woodstock, GA. He is the BMW master tech with years of experience with global import BMW and the price is unbeatable.
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      09-04-2014, 04:45 PM   #24
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I just left a local BMW repair shop for an oil change and the tech told me that my tensioner bolt was failing. Seems I caught it early because I have no sounds upon start up. You can visually see the belt "hanging" off just a tad bit. Better to fix sooner than later. When the sounds are there (squealing, whine) that is usually the bearing failing. Looking at $33 replaced. Better than a tow with a thrown belt.
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      09-05-2014, 09:41 AM   #25
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Yea me too, had the same issue with bolts and screws replaced..
cost around 500$ at dealership
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      09-05-2014, 10:59 AM   #26
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Is it just the bolt that is bending(which I can easily see as it is aluminum), or is the entire tensioner failing?
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      09-06-2014, 07:25 PM   #27
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Mine got replaced at 34k miles.
You should really replace it, there is a possibility of catastrophic failure where belt gets sucked by harmonic balancer pulley and destroys the crankshaft seal, basically forcing the shredded belt into engine.
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      09-09-2014, 02:30 PM   #28
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I just left my Indy shop after going in for the tensioner bolt. I need a new tensioner after all.... Vehicle is '08 328xi..... He swapped out 3 tensioners in his shop all with same issue....however all were used..... Having a new one installed tomorrow. Hopefully it fixes the issue. Belt hanging over pully lip about 1 mm.
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      09-10-2014, 04:06 PM   #29
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Sure enough..... Tensioner was bad... All 3 he tried were toast....my original and 2 he had laying around his shop. $188 and 30 minutes later I'm down the road.....thank goodness for Bavarian Auto Werke in Orland Park, IL!
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      09-10-2014, 04:30 PM   #30
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Quote:
Originally Posted by TheSt|G View Post
Is it just the bolt that is bending(which I can easily see as it is aluminum), or is the entire tensioner failing?
According to my dealership, it is the actual tensioner that bends over time. If you're going as far to remove the bolt, and have over 50,000 miles, might as well replace the tensioner anyway.
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      09-10-2014, 05:05 PM   #31
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hmm... I'm at close to 98k and the indy bmw shop just chked and told me I shouldn't do it, no signs of any problems... so many stories and no issues at close to 100k ??
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      09-11-2014, 07:54 AM   #32
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Quote:
Originally Posted by thomas88162 View Post
According to my dealership, it is the actual tensioner that bends over time. If you're going as far to remove the bolt, and have over 50,000 miles, might as well replace the tensioner anyway.
Oh I agree, I'm just wondering if we need to be concerned with other components in the area.
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