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Discussion Starter #1 (Edited)
Ok i am having issues with the power steering pump on a 2001 540i. it is a different part number than the M5's. My m5,32412229037. 540i 32411141570 .
I am getting large amount of cavitation and some groaning when turning to the left. I have tried 3 types of fluid and i have also flipped the lines going into the cooler around as had them off and i thought i might have them on backwards. i have tried Dextron 2, and normal advance hydraulic fluid and i am now running pentosin 7.1. seems ot build a abnormal amount of heat and lots of bubble when i check the reservoir. it will also puke fluid out of cap when the car stops. the car did not have and issue for the first 250 miles after i got the new radiator and fans and rad support in it. I am considering putting in a different pump. The effort to turn the wheel had gotten easier after i switched the lines and i must say is not really difficult before or after. it just groans a bit in a left turn. Any one have any ideas? plugged sintered screens? like on the hydrostat brakes on a Duramax? Or ......? <?xml:namespace prefix = "o" ns = "urn:schemas-microsoft-com<img src=" /><o:p></o:p>
 

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There is an air leak somewhere in the system.
 

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Discussion Starter #4 (Edited)
Moms new used 540it. Was hit in the front. New rad support and fans and coolers and radiator. We also changed the orings under the drivers motor mount bracket. So the lines were loose on top of steering box and off of the pump. I am going to check banjo fittings for tightness tomorrow. The car was over maintained. The cAr didn't leak or have an issue with PS for the 1st 200 miles or so back on the road.
 

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Moms new used 540it. Was hit in the front. New rad support and fans and coolers and radiator. We also changed the orings under the drivers motor mount bracket. So the lines were loose on top of steering box and off of the pump. I am going to check banjo fittings for tightness tomorrow. The car was over maintained. The cAr didn't leak or have an issue with PS for the 1st 200 miles or so back on the road.
From memory, one of the banjo fittings has a filter. If you are taking the fittings off to check, see if there is a partially clogged filter.

Regards,
Jerry
 
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