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Go Back   Dodge Cummins Diesel Forum > 2nd Gen. Dodge Cummins 94-98 12V Forums > 94-98 Powertrain
94-98 Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect...NO ADVERTISING

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Old 06-05-2012, 10:14 PM   #1 (permalink)
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Engine oil in Power steering?

A friend had Cummins fit his vacume pump leak on his 96. After the job was completed he noticed a leak from the back of the power steering pump and it was oil. The cummins guy told him that they put oil in the PS pump and it's ok to do this. Has anyone ever hear of this being done? Im no expert, but that doesn't sound right. your thoughts?
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Old 06-06-2012, 08:15 AM   #2 (permalink)
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Sounds really stupid to me. Powersteering fluid is hydraulic oil, engine oil is not. Should really foam up and destroy the pump. Be fun to watch on someone else's truck.
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Old 06-06-2012, 10:51 AM   #3 (permalink)
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Unless someone put engine oil in the power steering (not so cool, but it works), the rebuild ont he vac pump didnt go so well and the vac pump seal is pushing out engine oil (as it is pressure fed engine oil)
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Old 06-06-2012, 05:48 PM   #4 (permalink)
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Quote:
Originally Posted by 12valveguy View Post
A friend had Cummins fit his vacume pump leak on his 96. After the job was completed he noticed a leak from the back of the power steering pump and it was oil. The cummins guy told him that they put oil in the PS pump and it's ok to do this. Has anyone ever hear of this being done? Im no expert, but that doesn't sound right. your thoughts?
Oil was leaking from the back of the P/S pump? The back has fittings, so were the fittings leaking? It is not "OK" to put engine oil in the P/S pump and I doubt any half-way knowledgeable tech would do that. I have heard of the seal between the pumps failing and engine oil being sent from the vacuum pump into the P/S pump. Just exactly was the repair that was done by Cummins?
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Old 06-07-2012, 01:55 PM   #5 (permalink)
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the coupler between the vac pump and power steering pump is open, impossible for it to transfer oil between the 2. When either seal leaks, it just makes a f'n mess!
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Old 06-07-2012, 06:20 PM   #6 (permalink)
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the coupler between the vac pump and power steering pump is open, impossible for it to transfer oil between the 2. When either seal leaks, it just makes a f'n mess!
Not logical, right? I also once argued the same thing until I was proven wrong. Don't ask me the mechanics of it, I just know that a replacement seal fixed the engine oil in the power steering pump problem for at least one guy. If you refuse to believe it, I really don't care.
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Old 06-07-2012, 11:35 PM   #7 (permalink)
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I guess NW Cummins is going to do my friend right. They are going to do a house call and replace the PS Pump, and flush all the motor oil out. Hard to believe people that do this every day for a living could make this kind of mistake.
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Old 06-08-2012, 07:48 AM   #8 (permalink)
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I guess NW Cummins is going to do my friend right. They are going to do a house call and replace the PS Pump, and flush all the motor oil out. Hard to believe people that do this every day for a living could make this kind of mistake.
No, it is not... I've been calling on various dealerships, sole proprietorships, and other automotive-related businesses on and off for over 30 years with both Snap On and Safety Kleen, not to mention my own experience as an ASE certified master tech.

I've found that, on average, the guys doing this sort of work don't always know what they are doing, don't always have the right tools for the job, most of the time do not understand the THEORY behind the parts (for real!) and in many cases do EXACTLY THE OPPOSITE of what would be considered "good practice" because their intent is to increase business by selling the customer on THEMSELVES so they come back for more work, which they generate by not doing things right.

The general ignorance in the general populace helps feed the problem, in my humble estimation. Joe Smiley service writer and his right hand man offer coffee, a waiting room with Oprah on the tube, all sorts of "professional automotive remakrs" about the problem with their vehicle, and a skill at "upselling" routine repairs while using shoddy parts for maximum profit. Mr. and Mrs. Consumer buy into this uniformed "expert" routine and meanwhile some dufus who just bought a set of $100 Crapsman tools is out back asking everyone else, "How do you get this thing-a-ma-jig off of this GD piece of crap," as they proceed to beat the parts to a pulp. Wish that I had not seen this with my own eyes for all these years, but alas, I've seen it WAY too often.

The true techs that actually GET IT are rare and treasured! Usually, in the hierarchy of things, the best ones start their own business, eventually, and generally do things on a one-off basis instead of working for stealerships, oil change places, mass-market tire change shops, transmission shops, etc. If there is even ONE tech in most of those shops who has a clue that shop is beyond average. Same for stealerships.
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