Cleaning the oil pick up without dropping the pan?

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Just remember, Diesel fuel is a natural cleaner and somewhat of a lubricant. Most of your engine/fuel system cleaners are like this also. That is what makes it safe to run in your engine without scoring bearings/etc while cleaning the gunk. But look, there is no such thing as a gallon of anything replacing a hot tank. If it's a gunky motor and has low oil pressure at 130k, I suspect not much care, if any, was giving to it.
 
Before you jump off the deep end. The 3.9 is generally good for a lot more miles b4 these kind of problems, but they are notorious for bad oil pressure senders. You might want to replace yours b4 getting into everything else. It might save you a lot of trouble and money. Ask me how I know!
 
oldskool979 said:
Before you jump off the deep end. The 3.9 is generally good for a lot more miles b4 these kind of problems, but they are notorious for bad oil pressure senders. You might want to replace yours b4 getting into everything else. It might save you a lot of trouble and money. Ask me how I know!
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I would call this one the bingo.
 
I can see a mechanic charging for a new oil pump and everything and putting a new sending unit in and saying- see look at the pressure it's much better now LOL
 
j par said:
I can see a mechanic charging for a new oil pump and everything and putting a new sending unit in and saying- see look at the pressure it's much better now LOL
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Yep, 2nd thing I mentioned in post 16. Just changing oil every 5k these magnums are just getting broke in at 130k.
 
I had an old 77 ramcharger, 318 that was sludged up bad.

I did this, fresh oil change, minus one qt, added a qt of atf.
Drove it for 500 miles, drained the oil was as thick as molassas, dripping from the drain plug, instead of flowing out.
Did the same thing again, next oil change after that the oil came out out real dark, but flowed good.

Put fresh full oil in it and changed it alot, then the oil started staying clean.

When I finally tore the engine down, in the truck because it was way lifted in the air.
It was actually some what clean inside considering when I first took the valve cover off, before the atf the sludge made a casting imprint of the valve cover when the valve cover was removed.

The oil pump pickup still sounded like a baby rattle though, because of pieces of plastic timing gears in it.

But the old girl did not loose enough oil pressure to hurt any bearings.

Old reliable, always got me home, and at the time I had to drive it over 100 miles a day to get to school and work.
 
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Had a chevy the was sludged up bad. Couldnt put oil in it.
Pulled valve covers, scooped out the grey sludge with my fingers and poked a stick down the drain passages. Put valve covers back on and added a litre of “engine flush” to the crancase oil.
Ran it for 1/2 hour at high idle and dumped oil while it was still hot. Changed oil a couple times and it was good.
I ran that 350 for years, then put it into another truck and ran it some more.

Saw a ford inline 6 that had carbon built up in the pan deep enough to block pickup screen. That one was nasty, never saw one mile of highway speeds ever. It just putted around. 100%quaker state regular oil changes. Worst i ever saw. That still ran.
 
To add, with timing cover off you should be able to flush the pan spotless.
 
Still is. A bottle goes in my old Ram every oil change.
 
I had the exact same model and the same low oil pressure issue. Changed oil and added 1 quart of ATF, drove the Carlisle while pulling a pop up camper (2200lbs). Changed oil and filter after I returned (690) miles. never had an issue with low oil pressure after that. I agree 100% on the OP sending unit first. I've had many magnums over the years.
 
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