the gas/oil mix going through the pvc valve is going same place as port injection would be.back of the intake valve.
no gas...but yes oil.
You are missing it? With fuel in the oil the fuel will vaporize off and thus there's atomized fuel & oil going across the intake valves
thank you for your post I actually understood .The HPDI pump is driven by a square lobe on the rear end of the intake cam (1 in pic). The pump itself is a spring-loaded diaphragm that rolls on that lobe (2 in pic). The spring-side of the pump is bathed in engine oil with the rest of the cam, the inside of the pump is bathed in fuel at ~2500psi.
The suspicion is that, given the lack of performance issues associated with the fuel dilution (no rough running/idling, misfires, CELs, etc), the fuel is seeping through the seal in the pump (2) and finding its way into the oil without affecting the combustion side of the engine. The trick is convincing dealers and Ford that this is the issue that needs to be reconciled.
Possibly. Something of interest would be to determine not only the dilution percentage of the fuel in the oil, but also the amount of metal content per PPM. An engine with this much fuel in the oil would certainly have more metal content due to the highly irregular reduction in viscosity. Truly the only way to determine this would be a head to head comparison of two oil samples. One from a vehicle that exhibits the excessive overfill condition and one that does not. A baseline would have to be established to prove anything. Not completely impossible but for certain Ford Engineering would need to collect their own data well before establishing a TSB. I for one have not experienced this on my Ranger. I'm nearly on my second oil change. We are also keeping a close eye on my Stepfather's new Ranger. He's right at 5k on the clock with no signs of this issue. Doesn't mean it may not present itself in the future. However, this is an important thread to follow. All good info here. I for one would keep this real simple with my dealership. The oil level is increasing and you need to fix it period.The HPDI pump is driven by a square lobe on the rear end of the intake cam (1 in pic). The pump itself is a spring-loaded diaphragm that rolls on that lobe (2 in pic). The spring-side of the pump is bathed in engine oil with the rest of the cam, the inside of the pump is bathed in fuel at ~2500psi.
The suspicion is that, given the lack of performance issues associated with the fuel dilution (no rough running/idling, misfires, CELs, etc), the fuel is seeping through the seal in the pump (2) and finding its way into the oil without affecting the combustion side of the engine. The trick is convincing dealers and Ford that this is the issue that needs to be reconciled.
The HPDI pump is driven by a square lobe on the rear end of the intake cam (1 in pic). The pump itself is a spring-loaded diaphragm that rolls on that lobe (2 in pic). The spring-side of the pump is bathed in engine oil with the rest of the cam, the inside of the pump is bathed in fuel at ~2500psi.
The suspicion is that, given the lack of performance issues associated with the fuel dilution (no rough running/idling, misfires, CELs, etc), the fuel is seeping through the seal in the pump (2) and finding its way into the oil without affecting the combustion side of the engine. The trick is convincing dealers and Ford that this is the issue that needs to be reconciled.
