07 f450 6.0 no cranking low oil pressure - Diesel Forum - TheDieselStop.com
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6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.

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Old 05-23-2012, 01:26 PM   #1 (permalink)
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07 f450 6.0 no cranking low oil pressure

After oil change truck died on road towed back to shop had low icp pressure furthur testing revealed no cranking oil pressure for the first 15 to 20 sec then starts pressure reg spring looks good.please help.
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Old 05-23-2012, 01:30 PM   #2 (permalink)
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Did you use an OEM filter? still have the OEM filter cap?
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Old 05-23-2012, 05:10 PM   #3 (permalink)
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No used napa filter and cap the tube in the filter housing was cracked waiting for dealer dilivery
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Old 05-23-2012, 08:14 PM   #4 (permalink)
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Don't do anything else until you get an OEM cap and filter.

The aftermarket cap & filter combos cause all kinds of problems. I'd bet the filter is not fully closing the drain valve in the bottom of the housing which allows oil to drain from the housing as fast as it's trying to fill.
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Old 05-24-2012, 02:21 PM   #5 (permalink)
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Replaced oil filter and cap with oem truck started after a few cranks has good oil pressure road tested good parked truck to check for leaks did not re start 100 psi icp .pressure test hop system should system hold steady pressure or bleed off cant hear any leaks ?
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Old 05-24-2012, 04:25 PM   #6 (permalink)
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Sorry to say either you damaged the low pressure pump by not running enough oil to it or ya damaged the hpop from starveing it of oil, sad to sy it will probably be the hpop.
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Old 05-25-2012, 10:08 AM   #7 (permalink)
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Stc fitting possible has it been hard to start cold and and a little delay when hot?
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contains two standpipes, two dummy plugs
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Old 05-25-2012, 04:41 PM   #8 (permalink)
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Stc fitting on a 07 ? HPOP GUESS I NEED TO DIG. I also have head gasket leaking oil both sides easier to pull engine 07 no cab removal
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Old 05-25-2012, 07:18 PM   #9 (permalink)
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Are you asking if an 07 has the STC fitting?
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Old 05-25-2012, 09:23 PM   #10 (permalink)
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How are the headgaskets leaking oil??


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Old 05-26-2012, 09:57 AM   #11 (permalink)
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yes do they have the problem fittings. The heads are leaking from the rear lower corners .
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Old 05-26-2012, 12:02 PM   #12 (permalink)
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Be shure that the leak is not somewhere up forward and just running down the gasket edge and showing up there before ya go pulling heads..
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Old 05-26-2012, 04:39 PM   #13 (permalink)
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Yes i will double check did lots of cleaning i added dye will re check after holiday still bettr to remove engine to service heads ? this truck has engine mounted hydraulic pumps also ? Idid a leakdown on the hop system should it hold pressure or leak out fast ?
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Last edited by thw1; 05-29-2012 at 07:13 AM.
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Old 05-29-2012, 09:42 AM   #14 (permalink)
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Pressurized hop system in a quiet shop this morning heard leak under pas side valve cover looks like fun hydraulics cover the valvecover, oil leak is comming from somewhere around oil cooler cant see the front any tips?
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Old 05-29-2012, 06:06 PM   #15 (permalink)
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Valve covers off presurized system still dont see any leaks Iwill keep digging
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