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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 08-11-2012, 05:49 AM   #1
napaxcon
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Join Date: Jun 2011
Location: ri
Posts: 68
My Ride: 02 325i
water pump

ok so i put a new water pump in when i went to go change my belts just because i knew it was old, the new water blew to pieces after like 3 weeks, killed my radiator. so i replaced that and put the old water pump back in( wich was perfectly fine before i took it out) NOW, its making some kind of tapping grinding kind of sound, kinda sounds like bearings maybe. i know nothing is wrong with the radiator because i put that in first and it was all good. my system is also bleed the correct way. SO my question is ! Do you think because the water pump was in for so long and i took it out, that when it dried out it became maybe some kind of corroded or siezed up a bit ro kill the bearing???????? car is running at perfect temp all is good but sounds bad! the noise gets louder as i rev too! ???????? any suggestions is welcome!
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Old 08-11-2012, 08:16 AM   #2
paraklas
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Join Date: Jan 2006
Location: Cyprus
Posts: 5,913
My Ride: ESS TS2 320ci
Are you sure it's not a tensioner doing the noise?

What brand was the replacement water pump? Was it torqued to spec?
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Old 08-11-2012, 08:59 AM   #3
napaxcon
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Join Date: Jun 2011
Location: ri
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My Ride: 02 325i
the tensioners were fine the noise started imediatly after i put the old wp in. the replacement pump that broke was a bosh. torque specs didnt matter it was the impeller that broke to pieces... im gonna take off the belts on my day off and run the car for a few secs to make sure it is the pump. ..... **** i wish i could do it now its agrivating me to death
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Old 03-10-2013, 11:16 PM   #4
sjacoby112
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Join Date: Apr 2012
Location: Scranton, PA
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My Ride: 2002 325ci
did you figure this out? sounds like im having the same problems. i have yet to replace anything on account of the issue happening today. heres my thread.. http://forum.e46fanatics.com/showthr...439&highlight=
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