Buzzing sound from power steering pump

[AllroadMass]

I decided to take my entire front end off to do some AC work (drained the coolant and p/s fluid). So I put everything together on the front end and when I started up the car, I heard a low buzzing sound coming from the power steering pump. Anyone experience this before? Did I reattached the hose to the cooler lines incorrectly? What the heck is going on?

[924Carrera]

I decided to take my entire front end off to do some AC work (drained the coolant and p/s fluid). So I put everything together on the front end and when I started up the car, I heard a low buzzing sound coming from the power steering pump. Anyone experience this before? Did I reattached the hose to the cooler lines incorrectly? What the heck is going on?

The system very likely has air in it. I went around and around with this on mine a couple times (once due to a line rupture while on a road trip...FUN!) Jack the car up and turn the wheels 10 times lock to lock with the car OFF (hence jacking it up...that thing is extremely heavy if you don't). This will force any air out of the rack and into the lines. Then, start it up for a couple of seconds at the absolute most and shut it off, then wait 30 seconds to a minute. Keep repeating this, checking the fluid level every time, until it stabilizes and the air bubbles aren't coming out of the reservoir anymore. Turn the car on and then do the 10 times lock to lock steering with it running. It may whine and moan some from residual air, but it's OK provided the fluid is full enough. Then just drive it, and any additional whining it does (which it may) will eventually subside.

HOWEVER, if you get this far and open the reservoir and it looks like a waterfall rushing down inside, shut the car off and add more fluid. This happened to me on my most recent repair. I couldn't figure out what was going on, because every time I shut it off, the fluid level was at the max line on the little dipstick. However, this was because there was SO MUCH AIR in the system that it was giving a false reading. After I "overfilled" it, it improved IMMEDIATELY and I was comfortable taking it out for a drive within 5 minutes. So just be aware of this. Edit: When it's full enough and the car is running, the fluid will look level and motionless (basically) in the reservoir. You'll hear the sound of it flowing, but you won't actually see it entering and exiting the reservoir. If you can see this, it's underfilled. I should also add that after "overfilling" mine and getting the air out, it settled back down to the correct level, because it was never really being overfilled.

[AllroadMass]

Thanks. I put what I thought was enough fluid and when I opened the cap, water fall liked you said so I filled it some more. Will try your procedure. Thanks

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[924Carrera]

Thanks. I put what I thought was enough fluid and when I opened the cap, water fall liked you said so I filled it some more. Will try your procedure. Thanks

Sent from my Nexus 5 using Tapatalk

It's slightly possible that air could be getting in through one of the cooler line connections, but the system is under such pressure that it's much more likely to blow that line completely off if it isn't secured (this also happened to me because I decided to put the hose clamp around the larger flared diameter of the cooler pipe rather than the smaller part toward the end). So most likely there is just some leftover air in the system.

[AllroadMass]

It's slightly possible that air could be getting in through one of the cooler line connections, but the system is under such pressure that it's much more likely to blow that line completely off if it isn't secured (this also happened to me because I decided to put the hose clamp around the larger flared diameter of the cooler pipe rather than the smaller part toward the end). So most likely there is just some leftover air in the system.

Youre the man! Did your procedure and took a few times but she's purring like a kitten now. However, she threw 2 codes. Po113 and p0102. Hmm. I just replaced the secondary air pump.... Would that be it?

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[924Carrera]

Youre the man! Did your procedure and took a few times but she's purring like a kitten now. However, she threw 2 codes. Po113 and p0102. Hmm. I just replaced the secondary air pump.... Would that be it?

Sent from my Nexus 5 using Tapatalk

Not likely. Those codes are for MAF and intake air temperature sensor...which is built into the MAF on these cars. So check your mass airflow sensor wiring.

[AllroadMass]

Not likely. Those codes are for MAF and intake air temperature sensor...which is built into the MAF on these cars. So check your mass airflow sensor wiring.

Yea probably doesn't work well if I don't plug the dang thing in. not bad for my first time taking her apart. Best 2-week car ownership experience yet! Serpentine belt, both tie rod ends, driver side upper control arms, secondary air pump, valve cover gaskets, o rings on all ac lines. I'm sure theres more to come. Thabks for all the help.

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[924Carrera]

Yea probably doesn't work well if I don't plug the dang thing in. not bad for my first time taking her apart. Best 2-week car ownership experience yet! Serpentine belt, both tie rod ends, driver side upper control arms, secondary air pump, valve cover gaskets, o rings on all ac lines. I'm sure theres more to come. Thabks for all the help.

Sent from my Nexus 5 using Tapatalk

Nice! Hope it keeps running well for you.

[AllroadMass]

Nice! Hope it keeps running well for you.

I think she will, past owner did all service on time at the dealership and I'm hoping to continue the up keep. 123k but she feels really good. I'm going to turn it into my main driving school car

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