HELP ! 97 BMW 750 Water Pump Removal - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 12-05-2009, 09:05 PM
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HELP ! 97 BMW 750 Water Pump Removal

I have the water pump exposed but I need to remove the Crank Pulley & Harmonic Balancer (I think!) to remove the water pump. I tried using an impact on the crank bolt but it wouldn't budge. I even snapped off the head of my breaker bar! Any suggestions on procedure, short cuts, and/or special tools needed for job would be appreciated. Thanks
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#2 (permalink) Old 12-05-2009, 10:06 PM
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Not sure about BMW but you might want to check and make sure it is not a left handed thread. I have known a few folks that have broken stearing wheel bolts because they are left Handed threads.
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#3 (permalink) Old 12-05-2009, 10:18 PM
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Originally Posted by SoCal750iL View Post
I have the water pump exposed but I need to remove the Crank Pulley & Harmonic Balancer (I think!) to remove the water pump. I tried using an impact on the crank bolt but it wouldn't budge. I even snapped off the head of my breaker bar! Any suggestions on procedure, short cuts, and/or special tools needed for job would be appreciated. Thanks
Found these links to help you with your e38 & water pump!

Quote:
I tried using an impact on the crank bolt but it wouldn't budge.
There should be 8 smaller bolts inside the dampner......that you have to remove, not the large crank pulley bolt!

http://www.magnum1.com/BMW-740/740_P...-Pump-740.html

e38.org BMW 7-series information and links

jb

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_______________________97 E36|Conforti Software|M50 Manifold|AFE|Borla|H&R| Bilstein |Eibach|Rockford|3.15 LSD
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Last edited by johnnyBgood; 12-05-2009 at 10:32 PM.
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#4 (permalink) Old 12-05-2009, 10:37 PM
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There are no bolts on or in the balancer but thanks for tryin. The E38 Model w/ the M73 Motor Water Pump is such a pain and different from other models.
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#5 (permalink) Old 12-05-2009, 10:56 PM
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Originally Posted by SoCal750iL View Post
There are no bolts on or in the balancer but thanks for tryin. The E38 Model w/ the M73 Motor Water Pump is such a pain and different from other models.
Check out page 20 of 31

http://www.bimmerboard.com/members/d...eplacement.pdf

jb


• Remove the belts by undoing the tensioners
• Remove the water pump pulley
• Remove the crankshaft bolt and harmonic dampener
Warning: The crankshaft bolt is very difficult to remove. My experience required the
following efforts to remove the bolt:
• Locked the crank by locking teeth on the flywheel at the transmission
• Heating the bolt to red hot
• Soaking the bolt with a penetrant after heating.
• Using a 24” break bar with an additional 48” cheater bar
• 600+ ft/lbs torque wrench.

WOW
!

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_______________________97 E36|Conforti Software|M50 Manifold|AFE|Borla|H&R| Bilstein |Eibach|Rockford|3.15 LSD
____________________________________________http://www.cardomain.com/ride/3129109

Last edited by johnnyBgood; 12-05-2009 at 11:14 PM.
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