Procedure to Bleed Power Steering -s : | platizazvonok.ru
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post #1 of 15 (permalink) Old 10-12-2012, 08:42 PM Thread Starter
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Procedure to Bleed Power Steering

I have a 2000 Sonata GLS. My mechanic disconnected the power-steering hoses and reservoir to get at something else. Now there's air in the system and the steering pump constantly growls.

They're not sure how to properly bleed the system. The method they've been using is to raise the car off the ground and hard-turn the wheel stop-to-stop a few times and then let it sit while the bubbles come to the top of the reservoir with the cap off.

That's not working, the pump still growls - and it never did before they disconnected the system. They've done this 3 times now and there's never a change.

I called the local Hyundai shop and they said they could bleed it properly - to the tune of $120 bucks.

There HAS to be a better way to get the air out of the system - how do you do it so I can tell my guys at the shop?
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post #2 of 15 (permalink) Old 10-12-2012, 09:44 PM
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there should be a bleed valve on the steering rack itself. they'll need to connect a long length of tubing to this, ending in a drain pan. make sure the reservoir is full and that someone will be able to add fluid as needed to it while bleeding to prevent it from running dry. with engine idling, repeat the lock to lock turns until the fluid draining out is bubble free.

make sure you're satisfied with the work, and if that pump does not quiet down, seek reparations either in the form of a new pump, or some kinda WRITTEN warranty promise from them if your pump meets an untimely demise, just my 2 cents.

Wise men still seek Him!
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post #3 of 15 (permalink) Old 10-12-2012, 11:57 PM Thread Starter
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They're really good about honest work, they've done a lot a small stuff for me and not charged a dime, so I know they'll man-up if the pump goes belly-up.

Much appreciated; I'll visit this technique with them tomorrow. I'm sure they didn't know about the rack-bleed-valve since I'm their only Hyundai customer.
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post #4 of 15 (permalink) Old 10-13-2012, 11:12 PM Thread Starter
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Turns out there is not a bleed valve on the steering rack. We checked the microfiche parts photos and put the car up on the lift and found nothing.

So what's the next option?
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post #5 of 15 (permalink) Old 10-13-2012, 11:27 PM
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There is no bleeding for a Hyundai P/S system.. it is constant flow system air will settle out in a couple minutes.

What is likely hapening is the oil bottle has a super fine mesh screen in the bottom.. take the bottle out and flush it with brake cleaner to clean the screen and try again..

We replace hose and tubes all the time.. fill bottle, start engine, stop engine, add more oil, start again and hopefully it full enough to circulate and you can add a weee bit more oil between the marks on the bottle, steer both direction to fill both side of slave cylinder at rack, and correct oil level as needed

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post #6 of 15 (permalink) Old 10-14-2012, 12:32 PM Thread Starter
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If the air would settle out in just a couple minutes we wouldn't have gone through this exercise 5 times now.

I can't believe there isn't a proper method for bleeding the system. What happens if you have to install a new PS pump? You're stuck with this laborious process just to get air out? Doesn't seem logical.

At this point either there's a leak in the system allowing air in or we're missing something altogether.

I'll let you guys know how this gets sorted out finally.
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post #7 of 15 (permalink) Old 10-14-2012, 01:10 PM
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The air escapes out the top of the oil bottle to the atmosphere..

I have doing this for 30+ yr.. the system is a recirculating system, watch the oil in the bottle when you start it.

Remove the bottle, wash it out with brake clean to clean the screen.. the whirring you hearing is likelty the pump starving for oil, which in turn foams it and you aeriated oil back in the bottle

TSB for pump noise just in case you not aware..

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post #8 of 15 (permalink) Old 10-14-2012, 01:40 PM Thread Starter
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Thanks for the heads-up on the TSB; I'll ask the dealer about it and maybe get this sorted out with them.
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post #9 of 15 (permalink) Old 10-14-2012, 02:44 PM
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08-ST-001
SERVICE TIP - POWER STEERING OIL PUMP WHINE NOISE

DESCRIPTION:
Before replacing a power steering oil pump for a "whine" noise condition, check the oil pump reservoir filter screen for contamination. If the filter screen at the bottom of the oil pump reservoir is clogged, it may cause the pump to aerate and cause a "whine" noise.
If the filter screen is clogged, replace the reservoir and reconfirm the condition.

For the asking price of the bottle, I'd be more inclined to wash it out real well first and try again...

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post #10 of 15 (permalink) Old 10-15-2012, 02:51 PM Thread Starter
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I printed a copy of the TSB from AllData and gave that to my mechanic. Hopefully they'll get this sorted out.

I'll report back to the forum what the fix is once it's done.
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