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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 01-01-2012, 07:25 PM
xpl2008 xpl2008 is offline
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Mein Auto: E46 E65
Official diy water pump install with pics

Anyone can do this.
Takes anywhere from 1 to 4 hours.
Took me four hours that includes getting parts and one basic tool that I did not have.

With car cool. drain antifreeze any way you like either by drain plugs or just hoses. I would recommend flushing whole system out so there is no old coolant.

Take off front tray that covers front engine and right side engine panel.

Take pics of your belts and how they will look when re installing them. Or use mine here.


Take off belt using a long wrench with the right tool that fits in the tension pulley then pull right to make less tension. (ill post size later)


Take off tension-er pulley next to the water pump right hand side. This way you have more room to get that hard to reach bottom bolt later on and you will be leaving it on, just backed out all the way.

Take off left and right sensors.

Take off main sensor that is on water pump itself for use later.

Take off all hoses that go to water pump. To do this use a flat head screw driver carefully and just pull half way out the retainer clips on each hose. Then disconnect all hoses carefully.
The hard one is going to be the small bottom one. have patients it will come off.

Take off water pump pulley. 10mm. Use screw driver to hold in between nuts on pulley. Easy, remember when you re install dont go crazy torque, just hand tight.


Take off left side of water pump were the thermostat goes 3 10mm.

Then unscrew all bolts to water pump. Should be five. The hard one is going to be the bottom one that uses a long 10mm wrench. Dont use the open end you will strip bolt. Also this is the only one your going to leave on but all the way backed out. This way you dont have to take off the other pulley. They are all on hand tight with one small torque down. One snap and they all should come off. Notice pic on how small space you have for that last hard one. Hence why you just back it all the way out but leave it on.


Pull off old water pump straight off wiggle it a little it will come off.


Cheap design equals FAIL!


Clean off area on engine were old water pump was with razer and brake cleaner.

Now depending on your OEM water pump or Aftermarket use light silicone if needed per water pump instructions and re install water pump, thermostat, hoses, sensors.

Put belt back on.

Add coolant.

Make sure everything looks right.

Let dry if using silicone or just fire up and see if leaks and clean up and add coolant as needed.
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  #2  
Old 01-03-2012, 10:28 PM
xpl2008 xpl2008 is offline
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This was for a 2004 745i please put back in right area.
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  #3  
Old 01-05-2012, 05:41 AM
N62b44 N62b44 is offline
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Quote:
Originally Posted by xpl2008 View Post
This was for a 2004 745i please put back in right area.
Wow. Good job, was your engine overheating ??? How did you know it was water pump?
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Old 01-05-2012, 08:17 AM
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Lastcombo Lastcombo is offline
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Mein Auto: BMW745I E65 ,BMW318 IS 94
Nice Job
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Old 01-05-2012, 08:00 PM
HerbP HerbP is offline
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It seems like you have a bad oil leak you need to repair soon.

Good Job
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  #6  
Old 01-06-2012, 11:01 PM
xpl2008 xpl2008 is offline
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Saw water pump pulley moving weird and herd noise no signs of high temps. Happen real fast watch out dont get stuck some place.


Yes oil leak is the infamous oil pump seal.. Will do it and write up soon.
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  #7  
Old 01-07-2012, 07:21 AM
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NYC Faloochi745 NYC Faloochi745 is offline
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?
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Old 01-07-2012, 07:21 AM
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NYC Faloochi745 NYC Faloochi745 is offline
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Where the oil seal
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  #9  
Old 12-28-2012, 09:25 PM
cmpcpro cmpcpro is offline
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Sorry to bump an old thread but I am going to do my pump tomorrow and I see he takes the tensioner off to get to the bottom bolt without taking balancer off. He keeps saying leaving the bolt on but backed all the way out, what does he mean? Leave it in the pump to get it out with pump and put back in new pump? As you can't get pump out if you don't remove bottom bolt.. also if I am going to remove the tensioner I am wondering if it's worth replacing, do they fail often?
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  #10  
Old 10-30-2013, 02:12 PM
minhvotx minhvotx is offline
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Mein Auto: 2006 bmw 750li
Hi xpl2008,

Thanks for the good instruction. I replaced the water pump on my 2006 750li today. My car has only 45K miles but running noisy. paid $120 for dealer do check out. They said water pump is about to die, and would need $895 to replaced. Followed your instruction and got it done for less than $200 including flushing out the cooling system. The lower right bolt is very tricky, not sure how you were able to figure that out but it saved a lot of problem.

Thanks
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