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      08-12-2023, 04:38 PM   #13
e2p71828
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Drives: 2013 328i F30
Join Date: Aug 2023
Location: US

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Wow, thanks, Billfitz, for the insight! And it makes sense. I will go ahead replacing the belt and the tensioner, and will test and watch the battery. 10.5 years so far of original battery should be close to record?

Quote:
Originally Posted by Billfitz View Post
If it ain't broken don't fix it. The problem with a belt is you can't see inside it to be sure if it's ready to let go or not, so once you get to a certain mileage prudence dictates you change it just in case.
You can tell if a battery is good or bad. If you're in doubt the way to know is to charge the battery to at least 12.5 v, disconnect the negative terminal. If it measures more than a 0.3 volt loss overnight the battery is suspect. You have to measure it with a meter at the battery, otherwise if there's a parasitic drain it will start sucking away voltage as soon as you reattach the negative terminal.
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