I don't know, Jason. I've seen a couple others recently that almost got out of control, and one in particular seemed to settle down after I took MY nose out of it, and Tenn never was involved.

I must have missed that Pete. What I know of you, I would have to put the fault on the other guy, whoever that was.

I appreciate your kind comment, but I have blown it a couple of times in spite of my efforts to refrain.

I think it's a non-issue. The oil in the HPOP system IS cycled though -- we know that. Assuming the HPX is doing its job, it will not just fill with oil and vibrate back & forth. If it did, there would be no need for the HPX anyway. There will be some flow between the two heads, one way or another moving enough volume to not have a "pocket of nasties" setting there.

Tell you what Pete -- as a neat experiment, pull yours off and pour it through a coffee filter and see what gets caught in it.

I think I'll do just that, Joe.

Great idea!

I have a very slight ooze at one of the fittings anyway, so instead of tightening, I'll do a complete R&R to ensure a new fresh fit and try to catpure the oil for just this purpose. I'll also capture some engine oil at the same time and do a visual comparison, then wash the two oil catches through their respective coffee filter with some solvent and see what gets left behind for both.

As far as it baking the oil, I do know that after having an oil leak for a long time, (finally fixed), oil can lay in the valley without baking. Sounds like a good project Pete, and I hope you don't find anything wrong. I don't want to make any changes right now. I'm thinking there is enough oil movement to keep the oil changed out in the crossover line. Be sure and let us know and get some pictures....

I was thinking the same. Someone have a lot of miles on there HPX? Pull it off and look, I would be interested.


Excellent question Pete..

I think I mentioned it in a different thread, but I believe I have something like 40,000 miles on my HPX line right now... I guess that places it somewhere between "used and abused"/"rode hard and hung up wet" and "I smell wet paint".... not high mileage, but not "fresh", either. Just so happens I'm at the end of a 15,000 mile OCI right now, too, so I'll definitely get thsi checked out before changing the oil.

I can tell you all right now you won't find anything but engine oil. No sludge whatsoever.

Dan, I think you have me convinced, but since I have to disassemble it in order to clean the threads and reconnect with a clean start so I can eliminate the oozing, I might as well take a few extra minutes and satisfy my curiosities. I probably wouldn't go to the trouble if I weren't already having to get in there with it anyway.

I'll agree we could use some input from Gene on this.

You touched on something here that may be valid. Since we, or at least I, don't know how well balanced the oil pressures really are, we (I) just assume oil in the crossover will flow toward the drivers head to compensate for the 6&8 firing. What if the oil in the line justs acts as a damper but does not really flow to one head? Would that oil then really never be changed unless a problem developed on one side, then all the old oil would shoot towards the head with the issues?


I wouldn't expect to see sludge either, but if there's not enough movement through the line, would any of the contaminates suspended in the oil settle back out? Any possible condensation issues.

That's exactly what I was talking about earlier, Chris. I do doubt, however, that there would be any condensation issues given that it is a completely closed hydraulic system with (I think) no vapor space in the line.

Nothing will settle out in that line.
The injectors make a LOT of hydraulic noise and that vibration will shake anything loose.

I agreee there would be no sludge.My thinking is because it is to high of pressure.One pluse at 2500psi would clean out any hose.

I do think it acts as a damper between the to heads to help balance them out.With out it there just dead head and on there own,waiting for the inj to move the oil.

I am going here(sorry Pete).The Hpx line is a 3/8" line.
Why then are the HPOP lines 1/4" lines?

I am thinking that if they were 3/8" line they would flow more volume.

Then would it cause to much pressure drop?

For condensation, if the oil really did not move through, I was referring to the fact that the initial oil to fill the HPX would be old oil that may already have some condensation, combined with the air introduced into the system from the install.

Just kind of thinking out loud here. The easiest way to learn something is to toss an idea out there and let everyone tell me why I'm wrong.

Shaken, not stirred. I never considered hydraulic noise. Good point, thanks.