Coolant loss

[cthudak]

Hi guys,
I have searched and read all the threads similar to my problem, but none are exactly the same. My 97 4.0 ranger's coolant overflow tank has been running dry after about a weeks worth of driving. After getting out of the vehicle I can smell a faint odor of coolant. With the truck still hot I searched all over and under - no leaks anywhere. The truck runs fine at all loads and rpms and no codes. Any troubleshooting ideas to narrow down the leak? I have a pressure tester, but am unsure how to use it to find an internal leak....

Thanks for the help

 

[BrooklynBay]

Remove the radiator cap, and connect the pressure tester. Make sure that there is coolant or water in the system. Don't pressurize a dry system. Pump the tool until it reaches about 15 Lbs of pressure, and see if the gauge maintains the same amount of pressure for a few minutes. Check the rubber hoses for leaks.