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YOUR RESEARCH996 Turbo Power Steering
Reported or suspected cause
issue you can't have
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Reported cause
I've only ever replaced it on a Cayenne PDCC system and that was due to an issue you can't have ..
Leading evidence: 'issue you can't have' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'issue you can't have' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check clutch reservoir' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Performed · outcome unconfirmed · Original poster
I found a youtube video of a guy using the return line disconnected method on a Cayenne and he only ran the motor for a couple of seconds at a time.
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Performed · outcome unconfirmed · Original poster
I found a youtube video of a guy using the return line disconnected method on a Cayenne and he only ran the motor for a couple of seconds at a time.
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Suspected cause · Original poster
At first, I thought it was the a/c clutch pulley because when I took the belt off there was a lot of play in the pulley bearing.
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Suggestion
...given the system won't hold a lot of fluid couldn't you empty the reservoir with a turkey baster or equivalent , run the pump and replace a few times?
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911uk: 1 discussions
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Hi guys,
I'm changing the p/s pump on my turbo due to a high-pitched whining noise which appeared quite suddenly one day.
At first, I thought it was the a/c clutch pulley because when I took the belt off there was a lot of play in the pulley bearing.
I got a new bearing & changed it which silenced that noise so I could hear the pump.
The fluid is a very dark green.
I think I should change it.
What is the best way?
Is it ok to put the return pipe in a container and collect the old until new comes through?
Or will the pump empty the reservoir in a couple of milliseconds?
Also what bright spark thinks routing the a/c clutch wiring through between the pump and reservoir bracket is a good idea.
What a pain that was to put back together.
There is no service plan for changing this fluid and it is dark green as standard so i can only assume porsche means for it to last the lifetime of the vehicle .
I've only ever replaced it on a Cayenne PDCC system and that was due to an issue you can't have .. that's also in 16 years working on Porsches ... yup im only a youngster compared to my colleges lol .
PAS pump noises are usually due to a leak .. the pump either runs dry or a small leak introduces air and aerated oil does make a noise .
Worth having a look at the rack for any damp patches .. also jack the front end up and turn the wheels lock to lock .. any swishing or fluid moving type noises and the rack is leaking into the gaiters .
Also check the clutch reservoir .. if full to the brim or overflowing you have an issue .
I feel if you try and run the car to pump it out the pump will empty very fast .. best i can think of is disconnect a pipe from the steering rack .. let it drain out then refill the system .
Is it possible the pulley you replaced was the cause of the noise ?
Personally i dont think its worth changing the fluid but i just try and answer a question as best as i can .
Thanks for the replies.
MC, a good thought. I'll have a look at that, thanks.
DeMort, Thanks for your thoughts.
The fluid level has remained good throughout my ownership and I have found no evidence of leaks as yet.
When I say it's green I mean it is a cloudy dark green. Compared to the new it does not look healthy.
My car is a Tip so fewer places for it to leak I guess.
The noise is constant when turning the wheel from lock to lock. It only varies, in pitch, with rpm. I found an old post here from Ken at 9E saying the reservoir has valves in it which can make a noise when they are failing.
Too late for me to check if it might in my case as it's already apart.
The a/c clutch was the cause of a noise for sure. I also have a slightly noisy idler. Fortunately, it's the easier one to change. So I'll do that also.
If anyone needs fluid I got some yesterday from GSF at £4.08 a litre including VAT. Amazon had Pentosin listed at £45!
Thanks again,
...given the system won't hold a lot of fluid couldn't you empty the reservoir with a turkey baster or equivalent , run the pump and replace a few times? This would certainly easily and cheaply refresh the fluid?
Thanks for the thought. I did try to empty the reservoir using a vac pump but there's a strainer in the filler which prevents getting a tube to the bottom.
I found a youtube video of a guy using the return line disconnected method on a Cayenne and he only ran the motor for a couple of seconds at a time.
I think MC's idea to find another way to drive the pump without running the engine might be the way forward. Maybe using a variable speed drill/driver.
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