Accessory Drive Belt (How often/when)?

clairvoyant · 10-15-2010, 09:03 AM

Is that true that you must replace the accessory drive belt every 4 years or so even though there is no sign or wear and tear?
Is there any interval mileage guidance as when to replace?
Thank You

ENINTY · 10-15-2010, 09:36 AM

I did mine at 75,000 miles when it was about 3.5 years old. The old belt looked fine and probably was good for another 75,000 miles. I've kept it as a backup. The belt is inexpensive and very easy to replace. If you do it as a DIY it's cheap insurance.

matrix76 · 10-15-2010, 09:47 AM

Quote:

Originally Posted by ENINTY

I did mine at 75,000 miles when it was about 3.5 years old. The old belt looked fine and probably was good for another 75,000 miles. I've kept it as a backup. The belt is inexpensive and very easy to replace. If you do it as a DIY it's cheap insurance.

Searched the DIY's and it didn't come up.

Chriztofor · 10-15-2010, 11:32 AM

Invest in a bentley manual, $90 is well worth it or wait 2 years when I replace mine.

ENINTY · 10-15-2010, 07:00 PM

Quote:

Originally Posted by matrix76

Searched the DIY's and it didn't come up.

It's so easy I even for get how to do it now. I did it before I even got the Bentley. I think it is as easy as just getting hold of the tensioner pully bolt and releasing the tension on the belt.

clairvoyant · 10-15-2010, 07:10 PM

What tools do you use? Is it the same procedure for 335i? Thank you

Quote:

Originally Posted by ENINTY

It's so easy I even for get how to do it now. I did it before I even got the Bentley. I think it is as easy as just getting hold of the tensioner pully bolt and releasing the tension on the belt.

Chriztofor · 10-15-2010, 11:30 PM

Maybe this will help

http://www.e90post.com/forums/showthread.php?t=258050

ENINTY · 10-16-2010, 06:02 AM

Quote:

Originally Posted by clairvoyant

What tools do you use? Is it the same procedure for 335i? Thank you

I looked at the belt drive for the 335i on realOEM and it looks like the N54 tensioner pulley is a similar design to the N52 in the 325i. The post Chriztofor put up should work. So you need a No. 60 Torx socket and a decent size breaker bar. You fit the socket in the hole on the tensioner pulley arm and then release the tension on the belt by pushing or pulling on the breaker bar. Slip the old belt off, then SLOWLY release the tensioner back to its tension position. Get the new belt lined up correctly on all the pulleys except one you can easily reach, then release the tension again, slip the belt over the last pulley, then slowly re-tension the belt by releasing the tensioner back to its tension position. Remove your tools and start the engine to check for proper alignment of the belt.

Chriztofor · 10-16-2010, 07:23 AM

Take a look at this video, it is for an e46, but instead of using the torx, see if you can use a socket. If e90 kept the same basic design you can use either torx or socket. Socket is safer.

10-15-2010, 09:03 AM	#1
clairvoyant Major 79 Rep 1,032 Posts Drives: Bavarian Manure Wagon (BMW) Join Date: Oct 2007 Location: 45°19′20″N, 75°50′0″W iTrader: (5) Garage List 2007 335i [5.24]	Accessory Drive Belt (How often/when)? Is that true that you must replace the accessory drive belt every 4 years or so even though there is no sign or wear and tear? Is there any interval mileage guidance as when to replace? Thank You
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10-15-2010, 09:36 AM	#2
ENINTY Banned 173 Rep 3,415 Posts Drives: 2006 325i Sport Join Date: Jun 2006 Location: Virginia iTrader: (0)	I did mine at 75,000 miles when it was about 3.5 years old. The old belt looked fine and probably was good for another 75,000 miles. I've kept it as a backup. The belt is inexpensive and very easy to replace. If you do it as a DIY it's cheap insurance.
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10-15-2010, 11:32 AM	#4
Chriztofor Colonel 103 Rep 2,783 Posts Drives: '06 325i and '13 X5 Join Date: Feb 2010 Location: Chicago Burbs iTrader: (1)	Invest in a bentley manual, $90 is well worth it or wait 2 years when I replace mine. __________________ If no codes are being thrown use Chevron Techron fuel injector cleaner (concentrate). It solves rpm fluctuating upon cold start-up. Also, for most BMW problems start off by scanning your car with the Peake Research Tool. It contains the actual BMW codes. If you want to register a newly installed battery for free (just buy a $10 cable) and google/download BMWLogger
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10-15-2010, 11:30 PM	#7
Chriztofor Colonel 103 Rep 2,783 Posts Drives: '06 325i and '13 X5 Join Date: Feb 2010 Location: Chicago Burbs iTrader: (1)	Maybe this will help http://www.e90post.com/forums/showthread.php?t=258050 __________________ If no codes are being thrown use Chevron Techron fuel injector cleaner (concentrate). It solves rpm fluctuating upon cold start-up. Also, for most BMW problems start off by scanning your car with the Peake Research Tool. It contains the actual BMW codes. If you want to register a newly installed battery for free (just buy a $10 cable) and google/download BMWLogger
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10-16-2010, 07:23 AM	#9
Chriztofor Colonel 103 Rep 2,783 Posts Drives: '06 325i and '13 X5 Join Date: Feb 2010 Location: Chicago Burbs iTrader: (1)	Take a look at this video, it is for an e46, but instead of using the torx, see if you can use a socket. If e90 kept the same basic design you can use either torx or socket. Socket is safer. __________________ If no codes are being thrown use Chevron Techron fuel injector cleaner (concentrate). It solves rpm fluctuating upon cold start-up. Also, for most BMW problems start off by scanning your car with the Peake Research Tool. It contains the actual BMW codes. If you want to register a newly installed battery for free (just buy a $10 cable) and google/download BMWLogger
	Appreciate 0 Quote