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Old 09-13-2002, 03:23 PM
Posts: n/a
1990 300e Ac/belt

I am a new member. Could any member tell me how do you check: (1) Sepentine belt- sag whether it is acceptable or not (2) what tool do I need to check diagnostic codes?
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Old 09-14-2002, 01:11 AM
Registered User
Join Date: Apr 2000
Posts: 412
To check the belt, examine it for chunks missing from the grooves of the belt. Cracks are accepable but not pieces missing. There should be no steel cords showing or protruding from the belt. If the belt is too loose you will be able to spin the pulleys (like the alternater or water pump) by hand. If this is the case, the belt tensioner may be at fault. The tensioner assemblies are a common problem and do wear out. The belt tension is adjustable.
1990 190E 2.6
1996 Grand Voyager 3.3
1985 Mustang GT 5.0 5 SPD
1982 Suzuki GS 750T
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Old 09-16-2002, 08:32 AM
Posts: n/a
1990 300E A/C BELT

Thanks for your help. I will try to rotate the pulleys today. Any member in Houston, could you suggest a good MB repair shop ( except dealers)?
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Old 09-16-2002, 11:48 AM
pmizell's Avatar
Benz Zealot
Join Date: Jun 2001
Location: Houston, Texas
Posts: 838

Email me at -- I'm in Houston as well
'01 E430, Sport 72,000 mi
'98 C280, 126,500 mi
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