Oil leaking - 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 01-07-2013, 02:47 PM   #1 (permalink)
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Angry Oil leaking

Been on here a long time, but haven't posted for quite a while. 2002 PSD with 180,000 miles. It's been real cold lately (5 degree Fahrenheit) in the mornings and starting has been a pain. Plugged in last night but didn't seem to help at all. Took so long to start I nearly killed the battery. Anyway, after a morning of driving, I came home to see an oil leak coming from somewhere up front around the bottom wheel on the serpentine belt. Please see the pictures in my diesel stop album. Don't know if the cold weather has affected something or what. Truck has never leaked up to this point. I know there are lots of possibilities here but wanted some opinions on what it may be from.
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Old 01-07-2013, 03:14 PM   #2 (permalink)
RT
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I suppose it could be your front main seal - behind the harmonic balancer. It could just as likely be coming from somewhere higher and splattering - hard to tell from the pictures.
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Old 01-07-2013, 03:15 PM   #3 (permalink)
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There is an oil seal on the front of the crankshaft that mounts in the LPOP housing and runs on the harmonic balancer/crank pulley. It's possible that's worn out. Check closely to see where exactly the oil is coming from, because as you know gravity applies, and it may be coming from somewhere above the harmonic balancer.
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Old 01-07-2013, 11:36 PM   #4 (permalink)
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Yeah, it's definitely hard to tell where it originates for sure. I'm curious if it may be the cps possibly. I want to say that's what is right above the pulley. I changed it years ago but that looks to be it from what my feeble mind remembers. I checked the valley and it looks pretty dry, but I think most leaks up there run down the back of the engine and not where I'm seeing it. I'll look closer at the areas mentioned tomorrow when it's light.
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Old 01-08-2013, 07:51 AM   #5 (permalink)
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Check the seals leading to your oil cooler. Sounds like the metal gasket failed on the front half, or one of the rubber orings turned into plastic instead of rubber and its leaking down the front of the motor. It mounts on the driver side, between the waterpump and power steering pump.

The cooler itself is probably fine, just need some new gaskets. I got mine from diesel-orings. Easy fix, only took 2 hours or so. Mostly because it takes forever to bleed the heater core after you drain the coolant.




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Old 01-11-2013, 11:33 AM   #6 (permalink)
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Turns out it was the front main seal.
Picking it up today. Only been a day and I already miss my truck.
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4" Turbo back ATS Exhaust/DI Flip Chip
165k and counting

http://rides.webshots.com/album/559933283yofgnk
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