CJLennon
Well-Known Member
Hey Folks,
As always, thanks to all that read this. I have a 1974 Autocar with a 370 Cummins motor (don't ask, the boss can't let go of the past) that is smoking bad from the moment you start it up. The smoke is from fuel, not oil. This has beed verified. We replaced the injectors, set their travel using the dial indicator method and adjusted the valves but that did not change things at all. We next went to the pump and checked to see if there were any pressure shims/washers that we could remove and try that, but there were none. We then pulled the heads off just to see if we could find anything that might give us a hint about why this fuel is not being burnt properly. We found 2 cylinders, not on the same head, that were soaked with fuel. The valves all look good - no burnt edges.
So, at this point and because of a lack of books and info on this motor, I'm at a lose. Does any one have experience setting up the fuel systems on these old Cummins motors? I am skilled in diesel engine repair and calibrations so I should be able to understand you. Thanks again to all for your time!
Chris
As always, thanks to all that read this. I have a 1974 Autocar with a 370 Cummins motor (don't ask, the boss can't let go of the past) that is smoking bad from the moment you start it up. The smoke is from fuel, not oil. This has beed verified. We replaced the injectors, set their travel using the dial indicator method and adjusted the valves but that did not change things at all. We next went to the pump and checked to see if there were any pressure shims/washers that we could remove and try that, but there were none. We then pulled the heads off just to see if we could find anything that might give us a hint about why this fuel is not being burnt properly. We found 2 cylinders, not on the same head, that were soaked with fuel. The valves all look good - no burnt edges.
So, at this point and because of a lack of books and info on this motor, I'm at a lose. Does any one have experience setting up the fuel systems on these old Cummins motors? I am skilled in diesel engine repair and calibrations so I should be able to understand you. Thanks again to all for your time!
Chris