Many moons ago I purchased a SS high pressure crossover for then ITP Diesel. It has worked great for many years until last month. It started leaking at the connector on the driver's side and since has steadly been getting worse. After much seaching I have found my original plugs. I need to know two things. What torque should I tighten the plugs to. The other is I don't remember if there is an o-ring on the HPX that may have gone bad and if there is what size is it. Considering the number of o-rings that I replaced on this truck since the ultra low sulfur fuel came out I wouldn't be surprised if that is what it is.

 

If I recall there is a o-ring on those- Prlbly just need a new one. Did u try & tighten it a little with a backup wrench? Cant help u on the size

 

I did give it a little tweak with a wrench. It leaked even worse after that.

 

Bob has them in packs of 4. IIRC, It is a #5 ORB. They are the same ones used for the high pressure oil plugs. Product ID# 8-003 Replacement O-rings for Ford Diesel Engines

 

Thanks, mueckster. I should have thought of that since it went in place of the plugs. I found that out when I took off the HPX. The bad thing is that while I was I removing it I noticed that the leak is coming from the compression part not the boss fitting that's going into the thread that has the o-ring. I'm going to play with it some and see if I can get it to seal better. If that doesn't work it was supposed to have a limited lifetime warranty on it. I'll see if it covers this.

 

Had to tighten my hpx at the compression fitting some, to stop the leak too.