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Oil pump problem??? #5217832 09/20/19 10:55 AM
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Speak2Mountain Offline OP
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*1995 F-150 V8 200k (my FIL's)

**Leaking around main seal

***Burns some oil when running

****Problem: I'm borrowing and keeping the oil levels topped off @ full line. Yet, oil pressure gauge stays low to near 0 pressure when running.

*****Is this an oil pump problem or something else; the truck runs OK for its age and problems?

Re: Oil pump problem??? [Re: Speak2Mountain] #5217840 09/20/19 11:04 AM
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classic70 Offline
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Since it has not locked up yet, I would put a manual oil pressure gauge to confirm what the gauge is saying.


2003 GMC Yukon 5.3 228k
1997 k1500 5.7 225k
1970 GMC C15 5.3 100k
2012 Honda Odyssey 118K
Big Stash
Re: Oil pump problem??? [Re: Speak2Mountain] #5217861 09/20/19 11:29 AM
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MVFarms Offline
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If it's the stock dash gauge . . . they are basically a dummy light. Above 7psi (I think . . .) it'll read where it wants to read, and below that, it'll read zero. To echo the above, the senders have been known to go bad.

Does it sound like it has no oil pressure? Lifter noise?

Re: Oil pump problem??? [Re: MVFarms] #5217865 09/20/19 11:32 AM
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mattd Online Content
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Put a manual gauge on it and see what it says before you come to any other conclusions


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Re: Oil pump problem??? [Re: classic70] #5217866 09/20/19 11:33 AM
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WyrTwister Offline
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How many miles ?

Any valve train noise ?

Difference in oil pressure from hot to cold ? Idle to highway speed / RPM ?

Yes , install mechanical oil pressure gauge .

Wyr
God bless


Wyr
God bless
Re: Oil pump problem??? [Re: WyrTwister] #5217903 09/20/19 12:13 PM
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Speak2Mountain Offline OP
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200K

VT noise-yes

Yes there's a small difference

Re: Oil pump problem??? [Re: Speak2Mountain] #5217979 09/20/19 01:11 PM
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SeaJay Offline
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I believe it more likely that the oil pump is working fine, and its a gauge issue. Its hard to argue with a 200K engine that seems to run fine while burning a smidge of oil.

Re: Oil pump problem??? [Re: Speak2Mountain] #5217988 09/20/19 01:21 PM
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Chris142 Offline
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The stock oil gauge in those trucks as well as it's wiring for it are junk. It's likely a wire problem and the oil pressure is fine


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Re: Oil pump problem??? [Re: Speak2Mountain] #5218083 09/20/19 03:37 PM
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Anduril Online Content
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My XTerra has the opposite problem, oil pressure gauge is pegged to high any time the ignition is on, whether the engine is running or not. I'll replace the sender eventually.


2015 Nissan Versa Note 1.6/5MT
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Re: Oil pump problem??? [Re: Speak2Mountain] #5218401 09/20/19 11:22 PM
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clinebarger Online Content
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Those trucks had a tendency to clog the oil pick-up screen.


2001 Chevy Camaro L92/4L80E
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Re: Oil pump problem??? [Re: Speak2Mountain] #5218446 09/21/19 01:01 AM
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You don't have "zero" oil pressure. What it actually is dunno, get it checked. But the VT noise could be an indication it's low. With the main seal leak you're on borrowed time, so get the pressure thing resolved and keep topping it off. Otherwise you might consider a thick HiMi oil for the burning and main seal leak.

Re: Oil pump problem??? [Re: Speak2Mountain] #5218475 09/21/19 04:50 AM
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Lubener Offline
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Originally Posted by Speak2Mountain
*1995 F-150 V8 200k (my FIL's)

**Leaking around main seal

***Burns some oil when running

****Problem: I'm borrowing and keeping the oil levels topped off @ full line. Yet, oil pressure gauge stays low to near 0 pressure when running.

*****Is this an oil pump problem or something else; the truck runs OK for its age and problems?


More than likely you have a bad oil pressure switch which feeds the "dummy" gauge. It will register normal with 7 psi. Your engine would be locked up by now if you had below that. A test with a manual gauge would be needed to see exactly where you are at.

Last edited by Lubener; 09/21/19 04:51 AM.

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Re: Oil pump problem??? [Re: Speak2Mountain] #5218757 09/21/19 11:02 AM
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andyd Offline
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Top off with cheapest 10w30 you can find. Drive it slow and easy. Unless its a manual, an RMS leak is just a mess to deal with. In a truck of that age and miles, R+R"ng a RMS is a total.
PS Just a wild guess, but worth checking. OP senders are known leakers, could the RMS leak really be a leaky sender? Clogged PCV ?? Anything more radical isn't cost effective.

Last edited by andyd; 09/21/19 11:09 AM.

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