oil leak HPOP lines?? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 7 (permalink) Old 07-02-2010, 05:36 AM Thread Starter
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oil leak HPOP lines??

I have an oil leak some were on my '00 F550 I replaced the turbo pedestal, the oil cooler O rings, then had no leaks. Until I replaced the HPOP. If I start the truck up after it sat overnight and move it to a clean spot in the drive way it can idle for an hour and not leak any oil, then I run it down the road, pull back in to the barn yard and it's dripping off the trans X-member.

I think the leak is in one of the HPOP lines, because I cant find any oil leak while looking at the engine, even at 2000rpm. I am not stupid (or smart) enough to make the engine ramp up the HPOP pressure while observing the engine.

I think the oil is coming off the top of the engine. I also notice oil on the cast aluminum intake, the oil is on the part the is going to the driver side of the intercooler. I wipe it off travel some were with the truck open the hood and it looks like oil was spayed there again. The intercooler boots are all tight.

I have owned many of these high mileage 7.3 PS and i have not experienced a leaking HPOP line?

any ideas

Jay Noone
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post #2 of 7 (permalink) Old 07-02-2010, 11:47 AM
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Jay, I just put my truck back together yesterday after tearing off the fuel bowl and HPOP reservoir to get to the very front line fitting. I was having the exact same problems as you... no oil leak at idle or even most of the time driving. I could watch ICP pressures, and if I went over 2500 psi, I could stop the truck, get out, and see oil dumping all off the back of the engine.

Anyway, I had a large collection of oil residue underneath the very front HPOP line fitting. So I replaced the line and the fitting, and I hope it's now fixed for good. This would be the second time since I've owned this truck that it's leaked in the same spot. First time was when it was bone stock and had 60K miles on it.
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post #3 of 7 (permalink) Old 07-02-2010, 02:56 PM Thread Starter
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thanks for the info, I just pulled the HPOP lines off a parts engine. I am gona swap them out today.

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post #4 of 7 (permalink) Old 07-02-2010, 10:08 PM
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I had a leak up front and bought new fittings at the hoses. I compared the old fitting and new. The new had different seals. It might not be just your hose.

2000 F250 Supercab 2wd, 6spd, DP Tuner, Southbend conFE, MBRP 4" turbo back straight pipe. DIY intake.
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post #5 of 7 (permalink) Old 07-03-2010, 03:08 AM Thread Starter
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I think i fixed it today. I put a line from a past engine on it and it leak so bad it couldn't build enough pressure to start. So i went to NAPA and had them make up a line, it cost me $40

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post #6 of 7 (permalink) Old 07-07-2010, 04:41 AM
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Originally Posted by hayjayhorses View Post
I think i fixed it today. I put a line from a past engine on it and it leak so bad it couldn't build enough pressure to start. So i went to NAPA and had them make up a line, it cost me $40
That's pretty cheap, let us know how it works out. I think they are around $100 from Ford.

Your Napa must have a machine shop? Our Napa is not much better than an Autozone, parts only, no shop and little knowledge, kids working behind the counter.

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post #7 of 7 (permalink) Old 07-08-2010, 03:17 AM Thread Starter
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Yeah My NAPA is really good to deal with. I live in Palmer Mass and the Palmer NAPA SUCKS big time, the NAPA I use is in Ware Mass, it is called Rolla Motor Parts. The guys are really good they stock a lot of diesel pickup, medium/heavy truck parts and ag parts. They have gone way out of there way for me several times, like delivering me parts to a hay field in the middle of no were

They have a small machine shop in house for turning rotors, but they have a good relationship with a very good machine shop (Edgar Machine) down the road.

And the hydraulic line they made me seems to work fine.

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