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oil leak

3K views 18 replies 5 participants last post by  rugger327 
#1 ·
it apears that on my 97 powerstroke mason dump that oil seems to be dripping pretty heavily out of the thin cover over the flywheel. along with that the passanger side of the motor cant really pin point the leak.... but i dont want to drive up to a customers house and leave spots of oil. Anyone have any ideas?
 
#2 ·
It could be many things (and it could be either fuel or oil elated, so make sure). The valley of the engine has a drain path to the passenger side rear of the engine, so if there is any leakage up top in the valley it will drain there. In the valley, look for oil leaks at the High Pressure Oil Pump (HPOP), Hoses, and fittings (both at the pump and where the fittings go into the heads. There are large plugs on both ends of each head that can leak, there are o-rings at the turbo pedestal on the block side and the turbo side that can leak. The Exhaust Back Pressure Valve (EBPV) actuator cylinder can leak as well. Then there are many fuel leaks that can occur. Fuel leaks many times will look like oil by the time it picks up all the grime on its way to earth. Cheers!
 
#3 ·
ok great i know for sure it is not fuel i have smelled everything on the ground and not a hint of diesel in it. in the valley it apears to be very grimy but no puddles of oil. The tranny (e40ed) was just replaced with a new rear main seal, not sure why it would be leaking out of the cover covering the flywheel.
 
#4 ·
I just kinda run into the same problem with mine. Mine happened to be my dip stick tube at the very bottom. The piece that goes into the oil pan. Check that when u get a chance. Hope this helps
 
#5 ·
Mine is having the same symptoms. It's pouring down the block to the starter area. I'll check some of the areas mentioned above and report back. It is definitely pressurized and will leak a gallon out in no time. Thanks in advance for the help.
 
#6 ·
With a little better lighting I've identified that the leak is likely originating near the front of the engine in the valley. I can dry up the oil in the rear of the valley, and when the truck is running it takes a couple of minute for the valley to fill again and spill down the back of the engine. I cannot directly see where the leak is. I'm hesitant to pull the fuel bowl, hpop, and reservoir off just for giggles. What course of action would you guys take?
 
#9 ·
My advise, pull the fuel bowl out. It is held on by 2 bolts and the 3 fuel lines to the pump (replace these while you are in there, if they arent leaking they will be) once the fuel bowl is out of the way you will be able to see in there a lot better to see what you have going on. Hpop lines dont have to 'look' very wet at the o ring to leak bad, lots of pressure in there
 
#11 ·
It sounds like going through and replacing all of the gaskets/o-rings is the way to go so that in the near future I won't have to pull it all apart again to chase another leak.
 
#12 ·
I spoke with Bob at DieselOrings today, and told him my symptoms. He suggested some trouble shooting first instead of attacking the whole setup since it could take quite a bit of time. He recommended spraying down the oil pump, valley and surrounding areas with simple green. After that sets for a bit wash it down with the water hose. He specifically said to avoid using a pressure washer because water in the electrical connections can cause gremlins. Use compressed air to blow out the water and stuff white paper towels around the HPOP and by all of its fittings and plug. I did just that, and to my surprise my leak is coming from one of the two accessible fittings! I never get this lucky, and I was very surprised. You can't see that the fitting is leaking at all if the paper towels aren't there. Mine was a fairly significant leak, so it showed up quickly. I only ran the truck for about 30 seconds. You can see on the paper towels that there was a distinct signature where the oil leak was. If your leak is slower then you might have to run the truck for awhile. The nice thing is that I know exactly where the leak is and I didn't have to disassemble a thing.



 
#16 ·
There is much evidence of the forward high pressure line leaking at the fitting and that particular o-ring is clearly damaged. The other fitting has a different color o-ring. I suspect that someone had done this fix before....on just one fitting. And, I was surprised at the fittings that are on my truck. It does not appear that there will be any "rebuilding" of them as they are face seal and AN style fittings. There are no quick disconnects. I guess that I'll put it all back together with the loctite and new o-rings.

 
#17 ·
There were no quick connects on the OBS trucks (that was on the SuperDuties). Make sure you use Viton O-rings and lube them a little. Also inspect the sealing surfaces on both surfaces for any burrs, etc. Part numbers:

High Pressure Oil Supply Fitting O-rings
(Ford) 5C3Z-9N693-A, (International) 1823790C1 (o-ring for HPOP hose to pump joint)
(Ford) F4TZ-9N693-A, (International) 1815874C1 (o-ring for HPOP hose to head joint, port plugs and ICP)

Cheers!
 
#19 ·
I struggled with getting all of the connections loose to the fuel bowl, so in the end I had all the clamps loose and was able to remove the hpop drain with the fuel bowl still in. I did have to remove the fuel regulator. It has a bad oring, so I had to grab one from ACE since I had not planned on replacing it. I'll have to swap it out when a new one arrives. All other repairs to the hpop lines fittings went fine. The hpop reservoir fill plug had been rounded out, so I had to use an easy out to remove it. I had anticipated problems with it, and I had ordered a new one. The truck started with no problems and there are no leaks at this time.:woot:
 
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