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07-19-2017, 07:56 PM
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M116 Alternator Belt Failure (Second!)
Hi Guys,
So the alternator belt on my 420SEL with 120A ouptut alternator failed today. It blew apart and rolled one of the PS/Water pump belts over. The belt is a Contitech (Continental) belt put on by my shop while they did the valve job back in January. It had a little more than 5,400 miles on it. I had a similar issue last year. The shop replaced all my belts with Continental and a few months later the alternator belt failed. I don't have any hard data on the mileage. I think the failure might be related to the higher output alternator and the additional load it may place on the belt....or it could have been lose or too tight? Has anyone else with the higher output alternators run into this problem? My other cars are all serpentine belts so I don't have this issue. Let me know what you guys think! ---Kris
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k 
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