Okay...I'm sure there's a good reason for it, I just don't know what it is or can't think of it because of the hour, but...why is it that we can't route the CCV fumes to the fuel filler vent tube and let the oil mist mix with gallons and gallons of diesel fuel and add lubricity to the fuel? Are the contaminants from the crank case significant enough that running them over the turbo, through the boots, through the intercooler and into the combustion chambers is less destructive than diluting them with somewhere between 5 and 40 gallons of fuel (that most of us add some kind of store-bought oily substance to) and pushing it through the fuel system and into the same combustion chambers? My only concern may be the injectors, but I think they'd like it. I don't think it would over-pressurize the fuel tank, either. No drips, no smells, no greater environmental impact, no catch can to empty, and no greater cost than the hose, a tee, four clamps, and some zip ties or brackets. Thoughts?
A guy with the local tire shop runs a 50-50 mix of used motor oil and diesel to run his truck he filters it thru I forgot what micron filter but his truck has 4xx,xxx miles on it on stock injectors so I wouldn't see why not but how would you get it to vent in there without creating too much back pressure
I'm with you on that because when I tried a ccv mod it didn't go so well I had used a 1/2" 90 inline and it caused to much back pressure and caused seal leaks needless to say I put it back stock and I wash my engine monthly and have never had dirty boots since then I could see where routing to the tank would cause too much back pressure
I may not be as familiar with the fuel tank system as I should be, but I don't think it is under any pressure. The fuel pump is external, and is a suction pump, and the return line for the fuel from the engine is submerged in the fuel to keep air out of the system. The tank is not air-tight, otherwise the suction pump would be constantly working harder as the fuel level dropped. I never hear a hiss of pressure going in or coming out when I remove the fuel cap, engine on or off. Let's say gravity takes the oily vapor from the doghouse in a 5/8" line down the firewall and follows the underbody and frame to the tank vent and deposits there, or maybe the pressure escapes to the atmosphere but the cooled oily vapor is deposited into the tank, just minus the catch-can to be emptied...just thinking... maybe a catch can that has a clamp on or near the oil filter to be emptied at oil changes... still thinking...
I would just build a catch can oil separator system and then route to the intake. Crankcase vapors can include some condensation that I would not want drained into my fuel tank. The fuel tanks typically have a rollover valve with a small 1/4 breather line. You would need to modify that and in the end you are still going to be releasing vapors to atmosphere which may smell etc... You can't have a 1/2" CCV line fed into a tank that has a tiny 1/4 outlet.
These trucks use the same tanks as the gassers. So diesel does not evaporate like gas does but the system is designed to hold pressure. There is a lot of pressure coming from the ccv.
What is it you perceive to be wrong with the stock setup?
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