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DIY: Do It Yourself
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Old 10-05-2008, 06:29 PM   #1
Grayout
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Stewart Water Pump Ticking

My 2001 325Ci is approaching 100k. This weekend I decided to change out the plastic impeller OEM water pump for an upgraded Stewart pump. I also changed the hoses, thermostat, expansion tank etc.

Now, I've got a ticking noise coming from the WP, which also appears to be wobbling a bit. I plan on pulling everything apart again and running the motor without the belts. If the noise isn't there I'm going to switch the Stewart back to the OEM, which appears to be in perfect working condition. Has anyone else had a problem with the Stewart WP?
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Old 10-06-2008, 01:00 PM   #2
security6
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One word of warning with your plan. Be VERY CAREFUL about running your engine without any belts on. If there are no belts on, your water pump is not turning, and the coolant is not circulating through the engine. This can result in an overheated engine very quickly. An overheated engine can require a head gasket replacement or even replacing the entire motor.

If it was me, I wouldn't run the car without belts.
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Old 10-07-2008, 10:05 PM   #3
frogg320
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If the water pump has a bad bearing, you should know it. If there is any play in it, you have a problem (especially since you just got it). Make sure you installed it on all the way, and check the pump with the engine off.
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Old 10-24-2008, 07:27 PM   #4
reynaldo
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installed Stewart WP with no issue. I dont see any gain of 20% cooling though as mentioned. It will probabl last longer than OEM. Maybe it is not seated correctly? Loose?
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Old 10-25-2008, 03:24 AM   #5
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Quote:
Originally Posted by reynaldo View Post
installed Stewart WP with no issue. I dont see any gain of 20% cooling though as mentioned. It will probabl last longer than OEM. Maybe it is not seated correctly? Loose?
How can you see a gain even if it's there?
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Old 10-25-2008, 08:53 AM   #6
frogg320
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Quote:
Originally Posted by reynaldo View Post
installed Stewart WP with no issue. I dont see any gain of 20% cooling though as mentioned. It will probabl last longer than OEM. Maybe it is not seated correctly? Loose?
It says 20% flow, not 20% cooling...the engine has a certain operating temperature, which it tries to maintain. You're not going to see the needle drop because that's not what is good for the engine; the difference will only be not overheating when otherwise you might, and not running the fans as hard to compensate when you're approaching that limit.

That said, I don't know who has independently verified that increased flow number, if anyone has.
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Old 11-01-2008, 10:22 PM   #7
dakkon
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which also appears to be wobbling a bit. the waterpump is not torqued down properly, and it is probably moving with the tension on the belt. re torque the bolts holding the water pump in and i would bet the noise will go away.. you should also Not run your motor with the belts off, you will have 0 cooling to the motor, and it WILL over heat, just a matter of time..
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Old 11-02-2008, 02:41 PM   #8
Ivegotissues666
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The torque spec on the WP is next to nothing so it's more than likely not that. Sounds more like the impellar is damaged or the WP Bearing is shot. Pull the Pump back out and visually inspect check for bearing play which would indicate that wobble which you are refering to.

Jared
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