Oil Leak 2002 7.3L powerstroke f250 4x4 - Diesel Forum - TheDieselStop.com
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99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the 99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks 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 7.3L Power Stroke engine.

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Old 08-28-2012, 11:40 PM   #1 (permalink)
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Oil Leak 2002 7.3L powerstroke f250 4x4

I have a bad oil leak on my 2002 Power Stroke F250.... I cleaned the bottom of the engine and transmission and started my truck up and layed underneith and watched for leaks for 20 min.

It wasn't till I drove my truck 1/2 mile and looked again that oil started leaking...A LOT!!!

The oil appeared to be leaking from the back of the motor above the starter and down the back of the oil pan on the drivers side. Then I noticed Alot of oil leaking out of a vent hole, half way back, on the bottom of the MANUAL transmission.

Is this a rear main seal?! I can't imagine that it is not.
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Old 08-29-2012, 09:07 AM   #2 (permalink)
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That is a drain for the intake valley. You need to get on top of the motor and look close under all the wires and stuff. Most likely it is coming from the area under the HPOP up front and running down the valley and out the back. Use mirrors and a good flashlight.
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Old 08-29-2012, 10:21 AM   #3 (permalink)
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What mtnsammy said.

The fact that you didn't see much laying underneath with it idling points to an HPOP system leak. The pressure isn't that high when idling, but when you're under way it increases by 3-4 times, which makes a leak that much more severe.

Common spots are the fittings on the driver's side of the HPOP. Follow the hoses from the middle of each head forward to the HPOP and you'll probably find your leak. Another possibility is the plug on the back of the HPOP just to the rear of those hose fittings, and less likely is a plug on the bottom of the HPOP.

You can get an o-ring kit from dieselorings.com to fix all of that. There's some good info there as well on repairing those leaks.
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