Oil leak in the turbo area? Need some help

[GreenMachine]

Had the valve covers pulled to check my UVCH's and while I was in there I noticed this at the back of the motor under the turbo.

What is the cause? O-rings under the turbo or some kind of gasket? Help me out guys.

I should also mention it seems to lack balls lately. My 2000 f250 and my moms 02 ex are both running the same super chips hi performance tune (I know I know). And hers seems to take a dump on mine. Walks from 60 to 90 where as I have to really get into mine to get up there. No boost leaks on my intercooler pipes and the two red pipes are tight. Not sure what is the case. Any help? Thanks

 

[907DAVE]

That oil residue is normal. Most of it comes from the EBPV pedestal (were the rod comes out). This is a direct/ unsealed path to the crankcase and the vapors can accumulate on everything around it over time.

 

[4 Wings]

That oil residue is normal. Most of it comes from the EBPV pedestal (were the rod comes out). This is a direct/ unsealed path to the crankcase and the vapors can accumulate on everything around it over time.

:whs:

Looks like normal build up (weep-age) from CC vapors as 907Dave said. Unless you have liquid oil leaking that can't be seen in the photos... Degreasing the engine bay then checking for leaks will pin-point the source of any. Yes, there is o-ring sealing under the turbo liquid oil can leak past if it's bad.

The flapper in the EBPV gets carbon build up on it that will make it stick. There should be a change in exhaust tone from a sticky EBPV flapper or rod. The flapper and rod need cleaning about every 100,000 miles or anytime they are sticking. If it's sticky enough not to open fully, it can cause power loss. A fuel filter that needs changing is another potential cause.
All the best,
Jackie

 

[oldschool]

That oil residue is normal. Most of it comes from the EBPV pedestal (were the rod comes out). This is a direct/ unsealed path to the crankcase and the vapors can accumulate on everything around it over time.

The rod does have a seal around it, looks like a boot, and the washer behind the spring also has a seal, otherwise dirt could alos get into the crankcase. If there is ccv vapors coming out of the rod area, then the boot is leaking and possible letting contamination into the oil. e

 

[907DAVE]

I will have to get a pick of one, but there is no seal.

 

[oldschool]

I will have to get a pick of one, but there is no seal.

have mine on the bench right now, and just looked. If you look at the picture above, where the rod is threaded, there is a cone looking peice. thats a rubber boot, and the washer has a seal built into it.

 

[907DAVE]

Yes, but opposite of that seal is the passage for the turbo drain.

Can you post a pic of where the rod actually goes through the pedestal, and how it seals?

 

[oldschool]

 

[oldschool]

on the bottom picture, the washer/seal is up agains the housing where the rod comes out. that's what seals the area along with the boot in the upper picture. that washer/seal/boot is one part

 

[4 Wings]

I consider those boots, rather an seals. Everything with seals, gaskets or boots always develops a dirty build up from slow weep-age over time. CCV's are pressurized, they are pressure pushing out. If ccv's are escaping fast enough, liquid oil residue is pushed out. Any dirt would have to overcome outward pressure or be where it can be sucked in to enter.

The photos good info and it's always a good idea to replace whatever you can whenever anything is disassembled.

 

[907DAVE]

Good picture, but does that seal butt up against the outermost portion or the pedestal, or just in its bore?

 

[GreenMachine]

I appreciate all the help with the EBVP. What about my loss of power? Any ideas?

 

[oldschool]

Good picture, but does that seal butt up against the outermost portion or the pedestal, or just in its bore?

the seal is held against the bore by spring tension, on the side of the housing that the shaft goes through. The seal seals around that hole in the bore that the shaft goes through. There is a drain passage in that end of the bore so if the seal that actuates the piston leaks, it should just go to drain. If the hole that the shaft goes through isn't sealed, then contaminations could enter the oil via the drain passage in the end of the pedestal. Did I splain that good!!?? lol

 

[oldschool]

http://i1152.photobucket.com/albums/p500/coach-101/2012-02-13115849.jpg
The top picture shows how the control rod goes through, and the bottom is the surface that the seal on the piston assembly seals against.

 

[907DAVE]

How does the turbo drain tie into all of that?

 

[oldschool]

How does the turbo drain tie into all of that?

on the bottom of the bore in the back, there is a groove that connects the turbo drain hole on the pedestal with the cylinder if that makes sense. if you plug one hole on the pedestal for the drain, put air to the other, air comes out of the cylinder in that section. can't reall see from the pic but there is a channel on the bottom of the bore.

 

[oldschool]

I consider those boots, rather an seals. Everything with seals, gaskets or boots always develops a dirty build up from slow weep-age over time. CCV's are pressurized, they are pressure pushing out. If ccv's are escaping fast enough, liquid oil residue is pushed out. Any dirt would have to overcome outward pressure or be where it can be sucked in to enter.

The photos good info and it's always a good idea to replace whatever you can whenever anything is disassembled.

good point about positive cc pressure. If the boot is hard enough to let out cc fumes, then it probaly should be replaced.

 

[907DAVE]

That might be an updated seal design. I went and looked at one I have apart, and one that is complete. The one that is apart looks different on that end (no seal), the other had zero pre-load on the rod end - it just flopped around in the hole. There is no way that this would ever hold back CC pressures even if there was a seal.

When yours was assembled does the rod have some play, or is it a snug fit?

 

[oldschool]

That might be an updated seal design. I went and looked at one I have apart, and one that is complete. The one that is apart looks different on that end (no seal), the other had zero pre-load on the rod end - it just flopped around in the hole. There is no way that this would ever hold back CC pressures even if there was a seal.

When yours was assembled does the rod have some play, or is it a snug fit?

didn't really pay that much attention, but from what i recall, it was tight. This is a turbo I bought off of ebay, and don't really know what year it was. Going to put it on my obs after I rebuild it. maybe the eariler models didn't have a seal, but would think there should be something there to keep contamanation from entering????