low pressure oil leak from Oil Pressure Sender

John Mechanic California Posted   Latest  
Unsolved
Driveability
Drivetrain
2004 Ford F-250 Super Duty XLT 6.0L (P) 5-spd (TorqShift) — 1FTNW21PX4EB14365
Oil Geyser From Oil Pressure Sender

Third time on this truck. Every time the low pressure oil is shooting out of the oil pressure sender. First time we figured we had a bad sender, second time we replaced the Pressure valve assembly that is supposed to open at 75 PSI and we replaced the Oil Cooler bypass valve which was worn and catching. Second time in we tested the oil pressure which was over 100 PSI before we changed the valves, and then below 100 PSI when cold, but around 70 at 3000RPM when warm. It is back in again, same issue. Any help would be appreciated.

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Marvin Mechanic
Mississippi
Marvin
 

You replaced the valve in bottom of front cover ?

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John Mechanic
California
John
 

That is corrrect

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Marvin Mechanic
Mississippi
Marvin
 

Just so you know ..the dash guage means you have atleast 6 psi ..that’s all it means ..

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Agree
John Mechanic
California
John
 

Totally understand that it is useless.

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Marvin Mechanic
Mississippi
Marvin
 

I sent a good photo of the valve ..did you do this yourself or told someone..maybe spool valve is upside down .maybe you are putting in same way it came out which is wrong ..had guy put one in wrong on a 7.3 ..luckily I knew we had good oil pressure before we took the oil cooler apart so I knew it was something he did

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Marlin Technician
Oregon
Marlin
 

It appears as though you corrected the pressure fault, but another new sensor failed after that. OE Ford parts?

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John Mechanic
California
John
 

I only use and get Ford parts for Fords.

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David Owner/Technician
Alberta
David
 

Agree with Marlin on this one. Some of the aftermarket switches seem a bit feeble as we have found. Will add, does it actually have the correct oil in it?

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John Mechanic
California
John
 

15W40 Diesel

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Dan Owner/Technician
Texas
Dan
 

… Installed with proper socket ?… or … channel locks / vice grips / water pump pliers??? … Dan H. … Hobbs … South Texas …

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John Mechanic
California
John
 

Proper socket for the sensor by my ASE Master Tech/Diesel

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Michael Mechanic
Texas
Michael
   

Not a lot of experience on these 6.0s re: oil over pressure. On the face value I would think a stuck or sticking oil pressure relief plunger. Never had that particular issue… however 100 psi seems all kinds of wrong. Sorry, re read original and looks like you did swap out hi press control bypass.

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Darren Owner/Technician
Arkansas
Darren
 

Is the low oil pressure also over 100 PSI again?

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John Owner/Technician
California
John
 

Yes, back over 100

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Marvin Mechanic
Mississippi
Marvin
 

Parts assemblEd like today

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Darren Owner/Technician
Arkansas
Darren
 

I have seen this before. Failed oil pressure control valve (just because it is new does not mean it is not the cause), debris causing valve to stick, failed timing cover (damaged bore, warped bore, improper installation, warped cover etc.), improperly installed relief valve. Did you remove the pan and inspect for debris? Did you cut open the filter and inspect for debris? Once I installed a…

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Interesting
John Owner/Technician
California
John
   

We have not removed the pan, nor has the timing cover ever been off. We did not cut open the filter but did replace it last time it was in. I'll see if it is still in the waste barrel and have him cut it open and look for debris. we did check the old relief valve and there was no debris.

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