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8 Series - E31 (1989 - 1999)

 
 
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Old 09-20-2012, 05:53 PM
algee608 algee608 is offline
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Location: highland ny
 
Join Date: Sep 2012
Posts: 8
Mein Auto: 635.850,525,530
1991 850 woes

I own a 1991 850. I suddenly noticed a thumping sound near the porer steering reservoir. My mechanic said that it was the power steering pump;so I had it rebuilt and reinstalled after flushing the system. The thumping noise continues until I step on the brake pedal. It stops but if I continue to put pressure on the brake pedal,it sinks down to the floor.I do not want to buya a new master cylinder because it is hit and miss as I already wasted $$$ on a reman p.s. pump.Someone suggested that it could be the accumulator. Anyone have any ideas about this thumping as I feel that it is related to the braking system. Please help any suggestions are welcome.
Many thanks,
Algee 608
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