The complete automotive resource for buyers, sellers, and owners like you.
Car, Truck and SUV Forums at Roadfly
+ Bentley Forums
+ BMW Forums
+ Cadillac Forums
+ Chevrolet Forums
+ Ferrari Forums
+ Jaguar Forums
+ Lamborghini Forums
+ Lotus Forums
+ Mercedes-Benz Forums
+ Maserati Forums
+ MINI Forums
+ Porsche Forums
+ General Discussion
+ Marketplace Forums
Re: Tension of alternator belt (archive)

[ Follow Ups ] [ E30 M3 Message Board ] [ Msg. Board FAQ ]

Posted by Neil Deshpande on April 17, 2002 at 21:48:30:

In Reply to: Tension of alternator belt posted by Franco Carvalho on April 17, 2002 at 13:44:27:


Of course, there are belt tension gauges. But, I use the 1/4 turn test. If I can twist the belt a quarter turn via hand with reasonable force, I accept it. Also, if it is too tight you chew up bearings. If too loose, it will beat up the belt, squeal and glaze the pulley. Vague, I know, but you will have to experiment. Next time, feel for the pressure required for the 1/4 twist before you remove.

Neil Deshpande


Hi there,

How can I know if the tension of the alternator (and also of the water pump) belt is correct?

Does exist some instrument to measure the tension? Or the istrument is just our hands and fingers?


Franco Carvalho

'73 2002
'89 M3

Follow Ups:

[ Follow Ups ] [ E30 M3 Message Board ] [ Msg. Board FAQ ]
Questions, comments, or problems, please visit the Roadfly help desk. Logo © 1997 - 2018 Jump Internet Inc. All rights reserved.