stumpedd

If you have a Mack transmission with an oil cooler I checked this morning and there's no antifreeze in the transmission, gas tank or on the bottom of the oil pan. There is moisture in the valve covers but no signs of antifreeze in the cylinder heads. I looked up the cylinder sleeves and pressure test the block and there's no signs of leaks. I guess its the oil cooler because when i took off the Centri Max filter, it felt kind of heavy so i let it drain and noticed some little drops of antifreeze. Since the Centri Max filter housing is connected to the oil cooler, i guess that's the problem. Well, i'll see what happens when i install a new oil cooler and give it about a week to see if i still have to add antifrreze every 3 days. Many thanks guys.

Hey Guys, I have a 2003 Mack CV713 with a AI-400 engine. I have to add (2) gallons of antifreeze every 3 days but i dont see any leaks on the outside of the motor. There is no heavy white smoke coming out of the tailpipe and i pressure test the surge tank and is holding 15 psi steady. There is condensation inside the oil fill tube and has a greyish color. I changed the breather filter and it has some sludge. The motor is running smooth. I drained the oil but there is no sign of antifreeze. How can i go about on making sure it is the head gasket? What else do i have to check or other test i have to do? Is it the oil cooler or the air compressor or the intake manifold? Someone told me to check the gas tank??? This cant be possible or is it. Any help will be deeply appreciated.