Need help with HPOP leak - Diesel Forum - TheDieselStop.com
'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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post #1 of 7 (permalink) Old 09-20-2017, 06:59 PM Thread Starter
gdp
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Need help with HPOP leak

correction to my original post. I have a significant trickle of oil coming from the back, towards rear of truck, end of the unit under the fuel filter. With the engine running I see the trickle coming from there. It appears to be coming from a round indentation with a retaining ring at the bottom rear of the unit under the fuel filter. There is a large plug that could be leaking in that area. I need the truck for Saturday and would like to do it myself if I can. Pretty good mechanic skills but haven't removed that part ever. Any advice on the leak and repair job is greatly appreciated. Thanks

2002 F-250 CC Lariat 7.3 diesel, 170,000 miles

Last edited by gdp; 09-20-2017 at 07:23 PM.
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post #2 of 7 (permalink) Old 09-20-2017, 07:35 PM
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Mine looked like the leak was from the same spot but off to the side of it is a bolt head for a plug check that first. Non-serviceable plug under the HPOP is replaceable (had that leak also) but you have to pull the pump. Spend some time with engine/carb cleaner and get everything bone dry then run for a few min until you find the leak may save you some time. It is not that hard to pull the HPOP and replace whatever is leaking.
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Early 1999 F350 AUTO 4x4 CC LB DRW 4.10 6.0 trans cooler, Front hitch, 2,000 hubs/ brakes, Bilstein shocks/steering stabilizer, Diesel site coolant filter 203 thermostat, EBV delete, new O-rings, new Oil cooler, RIFF RAFF FRX, Glow plug led, Pillar gauges, Lighted cupholder, Painless wiring fuze block, Harpoon/hutch mods, Removed axle blocks. Air bags, 5 wheel hitch, In bed 7 pin plug. Spare tire key delete. KLHANSEN on speed dial. 75,000 as of May 2019
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post #3 of 7 (permalink) Old 09-20-2017, 07:36 PM
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If you do pull the HPOP you have to take the fuel bowl out so might as well get the O-RING kit for it also.
DENNY

Early 1999 F350 AUTO 4x4 CC LB DRW 4.10 6.0 trans cooler, Front hitch, 2,000 hubs/ brakes, Bilstein shocks/steering stabilizer, Diesel site coolant filter 203 thermostat, EBV delete, new O-rings, new Oil cooler, RIFF RAFF FRX, Glow plug led, Pillar gauges, Lighted cupholder, Painless wiring fuze block, Harpoon/hutch mods, Removed axle blocks. Air bags, 5 wheel hitch, In bed 7 pin plug. Spare tire key delete. KLHANSEN on speed dial. 75,000 as of May 2019
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post #4 of 7 (permalink) Old 09-20-2017, 08:15 PM Thread Starter
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Thanks for the reply. Exactly what is the part under the fuel bowl? Part of the HPOP or something else. There is a plug to the drivers side, about 11 o clock looking from the back of the truck, under the fuel bowl that might be the leak. Does it have oil behind it? I can pull it without removing everything else and easy to try for a fix. I did have the fuel filter rings replaced a couple of year ago. Really appreciate the help.

2002 F-250 CC Lariat 7.3 diesel, 170,000 miles
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post #5 of 7 (permalink) Old 09-20-2017, 10:56 PM
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I was just saying if you do have to pull the HPOP to get to the plug under the HPOP you might as well do the o-ring kit for the fuel bowl at the same time. Yes the drivers side plug leaked on me in the past.
DENNY

Early 1999 F350 AUTO 4x4 CC LB DRW 4.10 6.0 trans cooler, Front hitch, 2,000 hubs/ brakes, Bilstein shocks/steering stabilizer, Diesel site coolant filter 203 thermostat, EBV delete, new O-rings, new Oil cooler, RIFF RAFF FRX, Glow plug led, Pillar gauges, Lighted cupholder, Painless wiring fuze block, Harpoon/hutch mods, Removed axle blocks. Air bags, 5 wheel hitch, In bed 7 pin plug. Spare tire key delete. KLHANSEN on speed dial. 75,000 as of May 2019
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post #6 of 7 (permalink) Old 09-21-2017, 04:04 PM Thread Starter
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Really appreciate the help. Got it figured out and, after buying 3 o-rings for $50 at Ford, I got it back in business this morning. Just did the rear plug on the truck and will do the rest when I have more time.

2002 F-250 CC Lariat 7.3 diesel, 170,000 miles
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post #7 of 7 (permalink) Old 09-21-2017, 05:52 PM
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Quote:
Originally Posted by gdp View Post
after buying 3 o-rings for $50 at Ford,
...That are available from other sources for ~$13.
DieselOrings: 7 O-ring HPOP kit to reseal the 2 discharge hose fittings and rear plug that frequently leaks on the Ford 7.3 L Diesel engines
But I guess time is money, as well.

First truck -- 1929 Model A Ford pickup, restored from ground up. Wish I still had it!
'99.5 F250 PSD Supercab LB 4x4, ZF-6 w/SB Con OFE, 3.73LS, Boost & pyro gauges, Swamps S175/146 injectors, DP 80 HP Econo PCM (classic version
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