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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 12-18-2008, 09:08 AM   #1
Bake
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Questions about Alternator Replacement

My alternator died so I ordered a new unit from Bavarian Auto. I will have it installed this weekend. I was wondering if it is recommended for me to replace anything else at the same time. i.e. pulleys, etc. My car is a 2001 325ci with aprroximately 55K miles.
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Old 12-19-2008, 12:21 PM   #2
hummer
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That's low miles for an alternator. I changed my belts, tensioners and rollers at 120K commuting miles. But, time also has an impact on belt life. Check the belts, pulleys, and water pump for looseness.
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Old 12-19-2008, 08:39 PM   #3
Mike@F1 AutohaŘs
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Might as well change the belts, upgrade to the stewart water pump if you're doing a coolant overhaul, lightweight pulleys (optional).
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Old 12-21-2008, 12:30 AM   #4
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My factory water pump has lasted 102k and hasn't failed...but I'm going to replace it now as preventative maintenance. I think a lot of people go a little overboard on preventative maintenance...but it's true that you can never be TOO careful. You have to figure out what level of confidence you want to have, and how much money is worth giving you that assurance. What has all been replaced on your car so far, and how long ago? Do your belts squeal at all? if you look at them closely, do you see any cracking? You can pick up both serpentine and A/C belts for <$50 if you do. Pretty cheap and pretty easy.

IMO it's too early to worry about a water pump...and it's not a big enough job to warrant doing it now to save yourself time later. Of course it could never hurt. I wouldn't spend twice the money for a stewart water pump unless you're racing or doing pulleys or something. I'd go with an OEM one for $90...but then of course you'll wanna replace your thermostat and housing which is $60. I personally wouldn't bother with the full $315 kit from tischer....hoses and tanks and shiz...unless you see leaks...but I'm a college student, haha.
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