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Join Date: Oct 2001
Location: San Carlos, CA US
Posts: 5,523
Help, cannot get my PS fluid to stop foaming

I am trying to get the 1989 964 PS pump to stop groaning. I have pumped 4 gallons of fluid through the system and the output hose continues to pump out foaming frothing PS fluid. What am I doing wrong?

Resevoir is disconnected entirely.
Input to pump is connected to a hose and dipped into a 2 gal tank of Fresh PS fluid
Return hose is dipped into a 3/4 inch hose and dipped into a collection basket.

picture is of 4 gallons of PS fluid foaming.

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Porsche 2005 GT3, 2006 997S with bore-scoring
Exotic: Ferrari F360F1 TDF, Ferrari 328 GTS
Disposable Car: BMW 530xiT, 2008 Mini Cooper S
Two-wheel art: Ducati 907IE, Ducati 851
Old 02-17-2021, 08:43 AM
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Join Date: Mar 2004
Location: Leesburg, Georgia, USA
Posts: 1,701
Garage
That looks delicious !

Your set up is sucking air.
Change from a suction lift to a suction head.
Then crank/start the engine and let it run for a few seconds at a time (5 seconds maybe) then turn off. Then keep the container filled. Don't let the container run out of fluid. Do it a few times until the fluid stream is solid...

I'll just actually leave the reservoir connected and the return hose discharge to an open container.
Just run the engine a few seconds at a time not letting the reservoir get empty.
Fill it up then repeat.

If it still groans, the reservoir screen could be plugged up.

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1993 964 C2 still makes me smile
Retired and work as needed as a pain in the **s.

Last edited by bazar01; 02-18-2021 at 05:42 AM..
Old 02-18-2021, 05:38 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
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