HFservicesNC
Active Member
Hi everyone. I recently bought a 1980 kenworth w900a dump truck with a Cummins ntc350 or NH/NT 855. I thought the truck ran fine but i noticed that their was steam coming out of the blow by tube. I started looking into it more and realized that their is a good bit of water in the motor so i drained the cooling system and ran the motor till it got warm in hope to get some of the water out. It continued to steam after doing this a couple times so i tried to Pressurize the coolant system and had no luck. I then took the valve covers off and tried again and noticed that when i would add air to the coolant system more steam would come out of the top of the motor. I also noticed that one of the rocker arms on the front housing had no movement when the motor is running. can anyone help me. Also the air compressor intake is connected to the side of the motor. To what i don't know but i have also been getting a lot of water build up in the air tanks but i don't know if that is normal since this is my first truck with a air break system.