Here's a quick rule of thumb when replacing the serpentine belt. Check the
operation of all the drive components, idler, tensioner and so on. If any of
these have excessive play or are noisy, replace it. They don't always last the
life of the car so its a good bet to replace them if you car has high mileage.
my 2 cents
69 280 SEL 120,000 Miles
72 350SL 108,000 Miles
2004 VW Passat 4 Motion
1999 Mazda Miata
-----Original Message-----
From: Marshall Booth <[EMAIL PROTECTED]>
To: Mercedes Discussion List <[EMAIL PROTECTED]>
Sent: Thu, 01 Jun 2006 14:04:12 -0400
Subject: Re: [MBZ] Serpentine Belt Tensioner Components
M.Afzaal Khan wrote:
> Hi! At what mileage did you have to change this.? just like to know what
> is the life of a belt tensioner and other idler pulley's associated with it
The original tensioner arms and idlers used on '84-'85 OM60x engines
seldom lasted more than 50-75kmi. The later ones seemed good for
75-150kmi. By the '90s they may still be better (the aftermarket ones
MAY not be - I haven't had any of them in long enough to know). Factory
shocks seem to last 75+kmi while aftermarket ones seem more likely to
fail by 50kmi. The belts on my cars seem to go for 75kmi as long as the
arm and idler are in good working order (a bad arm, idler, shock or any
belt driven accessory will cause a belt to fail prematurely).
YMMV as climatic and environmental factors DO play a role in life of
these parts.
Marshall
--
Marshall Booth (who doesn't respond to unsigned questions)
"der Dieseling Doktor" [EMAIL PROTECTED]
'87 300TD 182Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi, '84
190D 2.2 229Kmi (retired)
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