What idiot came up with that system?
Why the heck would anybody want to pressurize engine oil to pressurize fuel oil?
Glad I don't own one nor never had to work on one.
This is a Ford engine?
It was developed by Caterpillar, and in their applications it has few issues. I have several Cat engines that use this set up..
Navastar used it in the 6.0 under license from Caterpillar. The concept is fine, take engine oil to 4,000 psi with the pump in question, apply it to a piston at the top of the injector. That piston drives one below it pushing fuel that has 1/7th the cross sectional area of the larger upper oil driven one. At 4,000 psi, you get 28,000 psi at the injector tip.. This generates a lot of heat that must be delt with. As with so many things the devil is in the details, and Navastar did not really get it right.
My 6.0 is still with me at 275K miles. It has cost me to keep it how ever. Another $2,500 for a turbo this last week, as the 2 year old one started leaking oil past the exhaust housing into the exhaust system. It was looking like a crude oil pipe at the exhaust tip.. and the engine was using oil to..
If you get rid of the emission controls, especially the EGR system it does help the 6.0's a lot with problems. I did mine 70K miles ago and have had little problems since. NAPA warranties injectors for this engine for 3 years, and Ford only gives a one year warranty. Go figure.
The 6.0 liter is a strong engine with few issues, except the crap Ford bolts to it in a pick up application. In Navastar trucks it is called a VT365 and has lots less problems in those than those Ford trucks do. Ford turns them up to 325 hp, and Navastar only lets them have 250-275 Hp.. With a static compression ratio of 19 to 1, and nearly 30psi of boost being throw in the mix, cylinder preasure is very high. No wonder they have had head gasket issues. That compression ratio is usually around 15 to 1 in similar engines. To get 325 hp and 580 ft/lbs of torque out of only 365 cubic inches is stretching the string pretty tight.. Ford may have over done it a bit..
Real truck engines that run 325 hp are in the 800-900 cubic inch range, and turn at 2/3 the RPM of the pick up diesels. They make in the neighbor hood of 1,200 to 1,400 ft/lb of torque, and have twice the oil and coolant capacities of these turned to the max pick up truck diesels. And they last 5 times as long in many cases to..
Regards, Kirk