7.3 OIL LEAK HELP - Ford Powerstroke Diesel Forum
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post #1 of 16 Old 01-04-2013, 06:29 AM Thread Starter
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Unhappy 7.3 OIL LEAK HELP

I'm a little new to this site so don't hound me too hard.

Ive got an early production 99 f350 7.3 and im having trouble finding an oil leak.
I replaced the rear main and now it seems like i have an oil leak from the valley that dribbles down the front cover. Ive cleaned the valley and front cover to the best of my abilities and ran the truck with it clean and cannot see where the oil is coming from. and now about a month after cleaning there's puddles in the valley again. i have heard of plugs in the valley leaking?.. Any help would be appreciated guys. keep in mind this is a 480k miles work horse.
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post #2 of 16 Old 01-04-2013, 07:16 AM
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how much oil are we talking? drips in a drive way over time, having to add oil after so many miles?

currently driving a 335i bmw, no more powerstoke
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Previous powerstrokes-
2002- F250 XL 7.3 auto, 4x4
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2002- F350 Lariat 7.3 Dually, auto, 4x4. 141k miles
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post #3 of 16 Old 01-04-2013, 07:21 AM Thread Starter
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Its a decent amount of oil. i probably top off two to three quarts between oil changes (about every two months/6k miles). i saw two lines around the left front with quick connect fittings that looked like they were dripping oil but after further cleaning i found that its leaking from the valley onto those lines. when i cleaned the valley i had the boots and tubes off and let the truck run for an hour or so and no oil showed up. just cant see visually where the oil is coming from.
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post #4 of 16 Old 01-04-2013, 07:26 AM
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Here's an interesting video, BUT I have to warn you about this guy,,,, he makes Great Videos, that Does NOT make him infallible though. He's got some really GOOFY theories (not about this though) So, don't take him as your Guru, as many do Confirm his advice on anything else he says

POWERSTROKEHELP.COM - The Information Source for Ford Power Stroke Diesel Owners
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post #5 of 16 Old 01-04-2013, 07:29 AM
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Two main areas for leaks are the turbo pedestal and the HPOP(high pressure oil pump). The line you are talking about would be my guess as what's to leaking and leaking that much.

Everyone always seems to think their rear main leaks, but in reality the oil is coming from the top of the motor and leaks down making it look like it.
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post #6 of 16 Old 01-04-2013, 08:19 AM Thread Starter
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I mainly did the rear main just because i had the transmission out for an overhaul and figured i might as well do it while i had the transmission out. when i clean the engine for inspection my first concern was the pedestal and the pedestal is dry and then inspected the HPOP (which i replace not too long ago) and also found that to be dry. am i missing something here.

Thanks again guys

-1999 F350 CCLB SRW 2WD 7.3 524K & COUNTING
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post #7 of 16 Old 01-04-2013, 12:51 PM
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check the lines that run from the hpop they might be leaking.


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99.5 f250 7.3 4x4 260k FF 160/30, PHP Hydra, S&B CAI, 4" Exhaust, RR Billet Wheel, Autometer Gauges, Transgo, Non-Ebpv Pedestal, High Flow Outlet, 08 Tow Mirrors.

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post #8 of 16 Old 01-04-2013, 01:25 PM
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Main items for oil leaks in the valley.
1a) HPOP Itself (already covered.)
1b) Check the HPOP lines (possible O-ring failure.)
1c) HPOP Non-Serviceable plug (needs the non-serviceable plug fix!)

2) CCV Dog-house O-Rings. Rings could be swelled, and not properly sealing - allowing oil to drain down on to the cover and valley.
3a) Turbo Pedestal O-Rings
3b) Turbo EBPV actuator O-Rings (if you have one)

Did I miss anything that could be added to this list for oil in the top valley area?

Edit, didn't the IPR and/or ICP Sensors have O-rings?


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post #9 of 16 Old 01-06-2013, 10:20 PM
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Quote:
Originally Posted by AzPatMan View Post
Edit, didn't the IPR and/or ICP Sensors have O-rings?

Yes and yes.
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post #10 of 16 Old 01-07-2013, 10:14 AM
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I just had a similar situation and it seems to be oil dripping from the 3" orange hose drivers side. The hose that connects the aluminum duct work off the front of the turbo to the valve cover.
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