1990 560sel power steering pump is leaking like a water hose. it looks like out of the back of the pump toward the rear of the car. what do you do for this? beasdes buy another one. car has 300,000 miles.

From your description it could be the pump, the gearbox, high pressure hose, or low pressure return hose. You need to clean it up and see where it's coming from. A really bad leak is more likely to be a hose.

There is an O ring that is shot. Remove the pump, replace the O ring. It is large, about 4" in diameter. There are several inside that should also be changed.

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I got too many cars!! Insurance eats me alive. Dave

78 Corvette Stingray - 3k
82 242 Turbo Volvo - Manual - 270k
86 300e 5 speed manual - 210k
87 420sel - 240k
89 560sl - 78k
91 420sel - 205k
91 560sel - 85k
94 GMC Suburban - 90k
97 Harley Davidson Heritage Softail - 25k
00 GMC Silverado 1 ton 30k

You can buy a rebuild kit off ebay rather cheap and replace all the gaskets and seals.

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William
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1987 420 SEL - Like a fine wine only better with age