I just finished my trip back to the east coast without more than 3 problems. WOOHOO!! The only problem with the truck is the stupid reservoir for the HPOP keeps draining down and then I have to refill it. Did a search for the reservoir and found maybe a check valve below the HPOP itself. Went to dealership, and they, said there is no such thing anymore now they use a standpipe, and if it goes you need a whole new timing cover on the front of the engine. Haven't seen much if any oil in the valley of the engine. Could it be that the LPOP is loosing prime? Oil gauge on dash doesn't indicate until truck starts and runs for a few seconds. Just trying to get going in the right direction before I tear into it. The other two problems were fuel prices and I lost a wheel on the trailer.

 

Jamin I'm not to sure but I'll bump you to the top. I think that Chris (f350-6) knows about this.

 

Did you see this post. It sounds like the check valve.
https://www.ford-trucks.com/forums/6...heeseland.html
Someone has a good exploded view that was posted before, but I can't find it now.

 

See this thread as well.

https://www.ford-trucks.com/forums/7...-downhill.html

 

Yep, that's the one I was looking for, good find and reps sent.

 

Gee, thanks Jim. Don't put me on the spot or anything. I stumbled across some really good info once, but forgot where I found it. The manual reads like stereo instructions sometimes so that can be a problem. Here's what I've been able to piece back together so far, along with the links I have handy. I hope this provides some help to you Jamin, or it sparks something in someone else's memory banks.

During initial start or cold start, the high-pressure oil pump (6600) receives unfiltered oil from the left side valve lifter oil gallery through the anti-drain back check ball valve. Once the engine starts or during warm engine starts, the check ball closes and the high-pressure oil pump receives filtered oil from the high-pressure oil pump reservoir. The high-pressure oil pump pumps the oil under extremely high pressures 4,115-20,577 kPa (600-3,000 psi) through the left and right side high-pressure supply hoses to the high-pressure oil rails (integral to the cylinder heads). Once in the oil rail, the oil is fed to the fuel injector bores through four oil feed galleries drilled and machined in the cylinder head. The high-pressure oil then actuates the fuel injectors.


1) Verify there are no external oil leaks in the HPOP reservoir or fittings which could cause your low oil condition.

2) There is a check valve in the head, but it is more of a back pressure device, and I'm not sure it would cause a drain back.

3) The reservoir to front cover oring, or reservoir to HPOP gasket can leak and either drain the oil into the valley or back down the front cover.

4) The HPOP can have an internal leak that will allow oil to flow through the pump and back into the front cover.

5) Broken pieces such as the stand pipe inside the reservoir could allow a drain back, but i've never heard of anyone experiencing this problem.

6) The internal drain associated with the IPR, or possibly the IPR itself could cause this problem (see attached link on HPOP)

Again, this is all just info I've gathered since I've been hanging around here. We all know a low HPOP oil level is a bad thing, but there doesn't seem to be a good explanation of what to do about it, so I've done what research I can. Here are a few links that may help, or will at least keep you busy with some reading.

Diesel-Central.com the technical source for Diesel Truck information, Truck Pulling, and Drag Racing (has a nice view of a disassembled HPOP with some good info.

FDDTS - Tech Publications scroll to the bottom of the page and click on the technician HPO guide




Sorry I don't have a better explanation for you, but I would start with measuring how much oil you have to put back in to the HPOP reservoir so you have an idea of how big of a leak you're trying to chase down. Please let us know how much oil leaks out over what period of time, along with any progress you make on this. I'm really interested to see what you find.

Sorry for the long post if it turns out to be a waste of time.

 

It has come to my attention that the front cover/HPOP reservoir is the problem with the leakdown. It appears that the one way valve does not allow the oil to leak down out of the reservoir due to this standpipe or some other design provision. I am not fully schooled on this, but I think a leaking down HPOP reservoir is due to a problem in the front cover/reservoir area. The Guys at Swamps told me about this. I should have taken pics of the front cover assemblies I saw. Sorry I couldn't be of more assistance.

This of course does not explain how some folks have fixed this malady with a new 1 way valve/check ball replacement. Perhaps it never really got fixed, or there was a problem getting oil there in the first place.

 

Thanks for the replies, fellas. I am starting to think I may need a LPOP. Since when I start the truck it doesnt show any pressure for almost 4-7 seconds. I am going to look into the drainback valves and such just to see what is going on with them. It is gonna look funny if I have to pull my dually to the back yard with my Saturn. Went out and checked the truck yesterday and the resivior was full, havent made it out of the house yet today though. Gonna check in a few. I didnt see any oil in the valley that would have leaked out so I guess I will try to take the resivior off and see what I can find, if it is low again.

 

Jamin,

Here's a pic of the gasket/O-ring between the HPOP reservoir (1) and the front cover (18).

Also a larger diagram of the HPO flow.

 

Low oil pressure is measured in the resevoir ,,won't see it untill its full again ,,,Injector O rings are another way for it to leak back ...,The front cover can be verified by looking at it ....There is also a de ariation valve on the front of the motor (may be only on the older ones) not sure ,,but it can come loose or fall out ,,,Very rare

 

That line on the right of the pic is where Im leaking oil, right at the connection to the pump itself, I was goin to replace the orings but cant find the "special" tool locally and fron international its $55 sorry for the hijack but I need some help on getting that fixed and it might help you out too since my valley doesnt look like theres a lot of oil in it untill you stick a finger in there and pull it out covered in oil.

Edit. the tool is for removing the lines and not the orings, just to make that clear. I gotta get the lines off to get to the orings.

 

http://www.motorcraftservice.com/vdi...iagnostics.pdf

Okay, If I was to slow sorry for the double post.

 

Ok went and checked the resivior and it was about 1" from the top. Started the truck and it took about 8-10 seconds to get oil pressure indication on the dash. It did start to die and then when the pressure gauge moved it started to romp. Definately not a cold issue romp since it is a balmy 95* outside. If the oil pressure is read at the resivior then it needs to have oil pumped to it from the lpop is this correct? It would seem to me that if the problem would be that the resivior runs out of oil it is loosing prime somewhere. That is why I am wondering about the lpop, now. But back to the original problem of the resvior going dry maybe it is related to each other. You guys have given a few links that I need to check out and then figure which way I need to go, and for that I appreciate it. If I hook up a mechanical guage for the oil pressure would I put it in the resivior or somewhere else?
Robin, It the drawing it looks like the anti drian is behind the resivior. Is that what is under the screw that the ratchet fits in, under the hpop?
Rick, When I went to the dealer to get a drawing and part numbers one of the techs also said the injector orings. How would I check to see if that is the problem? I am guessing I would need to pull the injectors, but am wondering if there are any other symtoms before I do something like that. Can you replace just the orings on the injectors?

 

Your not hijacking. The tool your talking about is to remove the hpop lines or something else? If its for the hpop lines then just go and find a door panel removal tool. It works just as good as a tool that costs 10x more. There was a thread a while back where they were talked about I will see if I can find a pic of one.

 

Chris, This is what you need to get the hpop lines off NAPAONLINE®
I did mine on the side of I 80, and used this.