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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 07-29-2012, 10:46 AM   #1
Baro1220
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Join Date: Sep 2011
Location: Cleveland
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My Ride: 06 530i sport 6speed
water pump diy

Water pump replacement 323i anybody have a link of a diy
i searched but seems that there bunch of stuff about it no complete write up

Thanks for your help

Seems that my w.pump puley is.making noise shoud i just do pulley or the waterpump also? Another ? do the new waterpump come with the pulley or do i have to buy it separate?
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Old 07-29-2012, 07:41 PM   #2
haurelio
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its probably your pulleys making the noise, but if you have never changed the water pump. you should change it and mind as well do complete cooling overhaul. there is nice write up about this from E46mango.

and to answer your inital questions. here is a nice diy http://www.bokchoys.com/differential/diy_water_pump.htm. Fyi( fan shroud must be remove if you an automatic)

Last edited by haurelio; 07-29-2012 at 07:42 PM.
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Old 07-29-2012, 10:55 PM   #3
Chris3Duke
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What makes you think it's making noise? Is it cracked?

The pulley is plastic, and no, the new water pump does not come with a pulley. When I replaced my water pump, I bought a new pulley (since my old one was cracked), and got a URO aluminum one.

The DIY was quite easy.
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Old 07-30-2012, 10:40 PM   #4
Baro1220
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I can tell that w.p pulley is wobling a lil bit...

just got new pump today and picking up pulley tmrw.
should be done on the weekend.
do i need.special tool for pulley removal?
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Old 09-25-2012, 12:59 PM   #5
ttrinh9
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Do I need to remove the coolant if I'm changing JUST the water pump? I'm planning on doing it this weekend but don't know if I can just swap the water pump without touching the coolant. Thanks
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Old 09-26-2012, 04:13 PM   #6
Baro1220
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no you dont but when u pull wp out lil bit of coolant will leak out so u will just open the bleed screw on expension bottle and refill it untill it starts comin out from bleed screw

very simple
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Old 09-26-2012, 09:14 PM   #7
kowalzekc
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I just did mine yesturday + the Thermostat (you might as well since your right there). Here is my posing about it with a couple of links:

http://forum.e46fanatics.com/showthread.php?t=946979

The biggest issue is torquing down the bolts. I snapped of the threaded studs for the water pump. Lucky me, I was able to extract it and I just used a bolt of similar length. Also, make sure you check your expansion tank for cracks as I understand it tends to go when the WP does. And if your WP is plastic, get all the pieces if it shattered. Lastly make sure you get the factory replacment as it has a metal impellor. Most that are sold at auto parts store as still plastic and many of the metal after market ones are stamped sheet metal. In my posting you can see the difference between the factory replacment and the cheap aftermarket metal one.

If you have any questions feel free to ask. This is a very easy job and if it wernt for a few minor hiccups, I would have been done it a few hour.

Good luck.
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Old 10-02-2012, 07:00 PM   #8
Oz Striker
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Hi all i have a specific query relating to if you are only just replacing the water pump. I've never done any DIYs before that involved any sort of refilling & bleeding of coolant system, but I've done all my reading up on it and feel pretty confident, so shouldn't have any issues there.

However I dont want remove my splash guard/ undertray as I've only just got it fitted securely with cable ties last week whilst the car was on ramps (dont ask, essentially cause i have M3 rep bumper). So approx how much coolant is going to spill out when i remove the water pump if i dont drain any coolant from the radiator drain plug? Is it going to be a few litres or are we talking just a small loss? Either way I'll be topping up and bleeding, but just would like to know ho much i'll be expecting and how much coolant to have handy.
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Last edited by Oz Striker; 10-02-2012 at 07:16 PM.
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Old 10-02-2012, 07:26 PM   #9
kowalzekc
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Quote:
Originally Posted by Oz Striker View Post
Hi all i have a specific query relating to if you are only just replacing the water pump. I've never done any DIYs before that involved any sort of refilling & bleeding of coolant system, but I've done all my reading up on it and feel pretty confident, so shouldn't have any issues there.

However I dont want remove my splash guard/ undertray as I've only just got it fitted securely with cable ties last week whilst the car was on ramps (dont ask, essentially cause i have M3 rep bumper). So approx how much coolant is going to spill out when i remove the water pump if i dont drain any coolant from the radiator drain plug? Is it going to be a few litres or are we talking just a small loss? Either way I'll be topping up and bleeding, but just would like to know ho much i'll be expecting and how much coolant to have handy.
I would say darn near a gallon. If you just want to refill, you don't have to worry about flushing the system. However I would flush the system if your water pump already went and it was a plastic impellor. When my WP went I had to use almost a whole gallon mix. When you do it, make sure you are going to go ahead and replace the belts or pull them both because coolant on them will cause slippage and wear out quicker. Also be sure to clean the out of the pullys. As far as bleeding goes. Do not start your car but put it in the run position with the heat on max and the fan on low. Open the top of your expansion tank and remove the bleeder screw...the large plastic screw right by your filler cap. Then keep adding until the bleeder screw over flows and the level does not drop down. BINGO DONE.

Read my posting:

I just did mine yesturday + the Thermostat (you might as well since your right there). Here is my posing about it with a couple of links:

http://forum.e46fanatics.com/showthread.php?t=946979

The biggest issue is torquing down the bolts. I snapped of the threaded studs for the water pump. Lucky me, I was able to extract it and I just used a bolt of similar length. Also, make sure you check your expansion tank for cracks as I understand it tends to go when the WP does. And if your WP is plastic, get all the pieces if it shattered. Lastly make sure you get the factory replacment as it has a metal impellor. Most that are sold at auto parts store as still plastic and many of the metal after market ones are stamped sheet metal. In my posting you can see the difference between the factory replacment and the cheap aftermarket metal one.

If you have any questions feel free to ask. This is a very easy job and if it wernt for a few minor hiccups, I would have been done it a few hour.

Good luck.
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