Bubbles/froth in PS resivior [88 90Q]

[Kneale Brownson]

Most common leaking point for air other than loose banjo bolts is the seal
around the shaft.  If you spray a bit of WD40 around the pulley while the
pump is running and it disappears immediately, the seal is leaking.

At 06:47 PM 1/18/2004 -0600, Matt Evans wrote:
>Thanks to those who responded to my charcoal canister question :)
>
>I put in some fresh pentosin and ran the motor for a while, turne dthe wheel,
>even went out for a drive.  Still get a huge amount of frothy bubbling
>from the PS resivoir and it overflows and goes everywhere.  
>
>I did some forum searching on audiworld.com and apparently this is caused
>by air getting into the system from somewhere.. usually the power steering
>pump.  PO of car said he put in a "new" steering rack.  The pump sure
>does groan a lot :/  If its the pump thats letting in air, how do i make sure
>of this ?  Is there a way to test this apart from just swapping with a 
>known good ($$) pump ?  Does the air leak usually occur from insufficient
>torque on the banjo bolts (presumably on the "draw" side of the pump?)
>.. or does it actually get sucked in from the mating surface between the
>front face and the pump body ? (or from somewhere else i don't recognize)
>
>Thanks,
>Matt
>
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