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7 Series - E23 / E32 (1977 - 1994)

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  #1  
Old 12-21-2010, 11:44 AM
cadensdad8 cadensdad8 is offline
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Location: germany
 
Join Date: Dec 2010
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Mein Auto: 1991 bmw 735i
1991 735i overheating

what can i do to check and see if the water pump is working properly? vehicle is overheating and im trying to narrow it down. also how do i bleed the coolant lines? thanks for any help you can give me.
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  #2  
Old 12-21-2010, 04:56 PM
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drivinfaster drivinfaster is offline
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Location: in the sticks you piney
 
Join Date: Nov 2007
Posts: 10,897
Mein Auto: rescued bmw's
first i would check the coolant level, and if low, then find and repair any leaks.

the coolant would not be circulating if the pump decided to go south, and a non-contact infra red thermometer would work great to check the temps.

iirc, there should be a bleeder on the thermostat housing. i believe all of the m30 engines are similar in this proceedure, so there should be lots of diy's online. pelican may even have a good link as well. here's one that i have glanced over and think is accurate to the proceedures) i have done on many, many different makes and models, not just bmw.
http://www.bmw7resource.co.uk/TechDo...d%20System.pdf

good luck,


df
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