Losing Water and Running Hot

[Nilao]

When I dropped a liner I could run with the cap loose and only lose a gallon a day. I had no symptoms other than loosing coolant from the overflow.

A friend of mine blew his a few months ago....same issue, start the truck and it would geyser the coolant out of the reservoir within 15 seconds of starting the truck. No other symtpoms. Still ran good, no misfires and no coolant in the oil. Only way we found either issue was to drop the pan, pull the stiffener plate and pressurize the coolant system to 20 psi overnight then bar the engine over. Each time there was coolant running down cylinder #5.