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Running down..seal..(Cummins 8.3 C-series.engine

Customer Question
I have diel keaking out...
I have diel keaking out of both fill caps and running down the side of my mh. Have tightned both caps and tried to seal better but it doesnt help. (Cummins 8.3 C-series.engine.) Mountain Air diesel pusher. Any ideas??
Submitted: 8 years ago.Category: Heavy Equipment
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Answered in 1 hour by:
6/24/2010
Technician: DR.Cummins, FIELD SERVICE TECHNICIAN replied 8 years ago
DR.Cummins
DR.Cummins, FIELD SERVICE TECHNICIAN
Category: Heavy Equipment
Satisfied Customers: 3,857
Experience: 16 Years working on Cummins Diesel engines,
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Hello it sounds like your fuel tank vent is plugged. The fuel will take the path of least resistance to relase pressure ( caps)
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Customer reply replied 8 years ago
what would cause this and how would you fix that??
Technician: DR.Cummins, FIELD SERVICE TECHNICIAN replied 8 years ago
Anything that gets into the tank and or time. To fix inspect the vent line should be either a small valve or a line in the tank not sure if you'll see it but you can blow it out with air or you might have to replace the vent it's self depending on the style you have. The tank is being pressurizes by the return fuel, the pressure is not escaping to atmosphere, so it will leak out of the caps.
DR.Cummins
DR.Cummins, FIELD SERVICE TECHNICIAN
Category: Heavy Equipment
Satisfied Customers: 3,857
Experience: 16 Years working on Cummins Diesel engines,
Verified
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Customer reply replied 8 years ago
Computer jumped ahead on me before I finished .Was sure it was the vent line but not sure if I could blow air back into tank and if it had some kind of valve.
Technician: DR.Cummins, FIELD SERVICE TECHNICIAN replied 8 years ago
ok thanks
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