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Old 07-13-2009, 04:39 PM
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Power Steering Pump Leak?

On my 380sl, the area under the power steering pump pulley, the ignition coil cover, and the vacuum lines to the charcoal canister have been oily for some time now. Since I recently replaced the front, main seal, and the rest of the engine is dry, I suspect the oil must be coming from the front, pump seal.

However, the pump doesn't have a crank case connection, and the oil doesn't look like power steering fluid. Moreover, it's been leaking for some time now. So, before I start replacing the front seal, I just wanted to make sure that the oil was in fact coming from that seal.

Does anyone happen to know how to confirm this, and/or how the pump shaft is lubricated?

Thanks in advance.

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Old 07-14-2009, 08:53 AM
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Of course we always clean the area of leakage in question & spray foot powder to see just where the fluid is leaking.

Shaft is lubricated thru a hole in the bushing.
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Old 07-14-2009, 12:32 PM
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Quote:
Originally Posted by M.B.DOC View Post
Of course we always clean the area of leakage in question & spray foot powder to see just where the fluid is leaking.

Shaft is lubricated thru a hole in the bushing.
Thanks for the advice, Doc.

My guess is that it has to be ATF coming from the pump, since the rear of the pulley is coated with oil. What throws me again, though, is that the oil is black, not red.

I still have to suspect that the front seal is leaking because (1) the other pulleys and belts are clean, (2) the coil and vacuum lines on the driver's side fender are coated with the same residue, (3) the rest of the engine is clean, (4) my power steering fluid is a little low, and (5) the steering box isn't leaking. Ergo, the front (and maybe the rear) pump seals must be leaking

Thanks again for the input.

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