To say im tried of trying to fix the problem is an understatement. i have put 5 different gaskets in runs fine with no oil leaks then it blowers under pressure. on the right side if looking at the front of the truck. its a 96 f350 7.3 turbo diesel.. i just can figure it out.. need help.. i just bought the truck and im just stumped..

 

Does it actually blow the gasket? Or just leak? I'm thinking that there's nothing wrong with the gasket, but the threads in the front cover have been pulled out and the pump is moving to the rear and leaking around the gasket. The next time you have the pump out take a good look at the threads and see if they're stripped. It might be time for a helicoil insert.

 

Welcome to FTE !

Are you sure it's the gasket and not a hose coming loose?

 

Does it leak running or sitting still?

 

One other thing to check is to make sure the CCV isn't all plugged up. If it isn't letting the crank case breathe, then it could be building pressure and blowing oil out around the gasket. Easiest thing to do is to take the CCV doghouse off the driver side valve cover and pour some gasoline through it, or better yet let it soak in a can of gasoline for a while then rinse it out good. I am willing to bet that is part of your issue. The HPOP gasket shouldn't be under a lot of pressure, so I don't know why it would be leaking unless you're building pressure in the crank case.

 

It is coming from the Hpop Gasket at a super high pressure.. when the gasket goes it sends a Fan spray of oil top drivers side. then i pull the gasket and the top cut out on the drivers side is always blown out ( Rubber is removed from metal). I have had the pump out 5 times threads maybe a little week on the pass side but stay still at 18 ftlbs. Will try the ccv today.. And also it is blowning this gaskets in under 10 mins at idle with new gasket no oil.. If i get to higher Rpms old faith full comes spraying out the hood.

 

And the leak comes from the gasket between HPOP and the front cover (not the o-ring between the reservoir and the front cover)? That is where the supply and return ports in the HPOP are.It seems to me like you have something else going on. Just as a test you could try running it with the oil fill cap off the passenger side VC. I would try this first, but I doubt that is the issue if you're making that much pressure.

According to this diagram that top driver side port is the return port to the crankcase.



If it is leaking that badly (spraying oil) I am guessing that you may have a bad bypass valve or something someplace. It sounds like you're building way too much pressure there for some reason. You should only be seeing regular oil pressure there between the HPOP and the front cover. I am thinking 70 PSI or so is about all you should be seeing. Any way you can get a gauge on the system to see what your actual LPOP pressures are?

How long since you changed the oil and filter? Have you checked the engine for excessive blow-by? To test for blow by, open the fill cap, turn it upside down and lay it over the hole it threads into. If it just kinda rattles around, you're probably good to go, but if there is enough pressure there to blow the cap off the hole, Houston -- you have a problem!

 

I think mule got this one down.

Thats my suggestion as well.

 

It's comming from the gasket. And it comes out in a fast rate spray. I put a new sensor on the back of the hpop last gasket. Going to try the blow back test and the ccv valve . Every diesel shop in my area is stumped.

 

But I can't run it to long due to the large amount of oil spraying out.

 

Read my and blue mules post.

With having the HPOP in and out that many times, I almost guarantee you the threads are trashed.

After 3 or 4 swaps, you have to do helicoils.

 

Nate has some great info though also, but I'd check those threads first and eliminate that issue first off.

The check valve is the next place I'd go.

Most diesel mechanics know nothing about HEUI systems. Usually perform useless repairs on 7.3's and similar engines with no success because they dont understand them.

 

If the bolts are holding 18 ft/lbs and staying tight the holes are fine. The way the angled teeth on the gears are cut, they pull the pump tighter to the front cover while the engine is running, so the only thing the bolts really do is to hold the pump in place and maintain that seal when the engine is off. Check the bolts again to be sure they are tight and not stripped, but if the bolts are staying tight, I see no reason to mess with drilling, tapping and putting in the helicoils. It is something to check though...

 

Ok heading to ford once more to get the new gasket. Taking out the ccv and putting in gas. Hope this works!

 

Can't seem to find a pic of the location of the ccv. Drivers side vc?