Question about 2007 Mercedes-Benz GL450

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Power steering I fixed a new power steering pump due to stiff steering. The new pump got jammed a few days later burning the belt and one of the adjustment pulley. Changed the pump again and this time the pulley of the pump broke a day later. Anybody got an idea what's causing the pumps to get stiff on my car.

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Before changing pump jack car up check track control arms & bearings.Sounds like iits dragging not turning.Chech all movement will wheels off the deck ie on ramp.my poblem was dirt& locked control arm.

Posted on Nov 17, 2013

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SOURCE: Leaking power steering pump

pls locate where the leak exactly coming from.....it could be from the high pressure line O ring is not properly set or not tightened...

Posted on Apr 08, 2010

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2 Answers

Stiff steering


2 possibilities.
1.most likely your rack and pinion is out due to faulty power steering pump.
2.less likely your power steering is out.

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Check the drive belt to the power steering pump and the level of fluid in the power steering reservoir.

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I would change the belt first. Power steering is required for all turning but does get a little more usage during hard turns. You will want to check the fluid levels of the power steering pump as well.

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Sounds like the power steering pump has failed.
You could take the serpentine belt off and check the pump pulley.

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Power steering problems (stiff steering wheel)


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you problem indicates seized bearings in the rubber mounts at the top end of the struts and you are actually trying to twist up the springs
the new rack fixed for a short period of time eliminates the power steering pump
It could be the steering column joints are dry and seizing up as well ( dead spots when turning the wheel indicates joints not turning freely0

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My power steering was fine then suddenly it started to go stiff and then a slight whine when turning the wheel. refilled the power steering fluid, it took a whole 1 litre jug and was fine for a few...


It should like you may have a leak if it took a whole litre. Once you fix the leak you may also find the power steering pump still makes noise. This can be repaired by replacing the pump. I hope this helps.

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Check your serpintine belt for cracks, & dryness. Also if wet the steering will not operate easily neither

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Power steering pump is stiff on occasion not only in the morning but sometimes during the day also.fluid is at normal level. belts have been replaced last year?


The fluid check valve built into the power steering pump may be bypassing your pressurized fluid back to the reservoir, and not assisting your steering input. You may need a new pump. The only way to know for sure is to have the power steering output checked with a guage set.

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Sounds like the serpentine bellt has come off the drive pulleys. this belt is the link between the crankshaft pulley and all the other pulleys. it drives the power steering pump, a/c compressor, and your alternator.
Stiff steering due to no Power steering pump activity and the battery light is on due to the alternator not charging the battery and supplying power to vehicle components.

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