RAM 2500 Van V8-5.9L VIN Z (1997)
Radiator Cap: Initial Inspection and Diagnostic Overview
HOLDING CAP RIGHT SIDE UP
Hold cap at eye level, right side up. The vent valve at bottom of cap should open. If rubber gasket has swollen and prevents vent valve from
opening, replace cap.
HOLDING CAP UPSIDE DOWN
Hold cap at eye level, upside down. If any light can be seen between vent valve and rubber gasket, replace cap.
REPLACEMENT CAP
Do not use a replacement cap that has a spring to hold vent shut. A replacement cap must be the type designed for a coolant reserve/overflow
system with a completely sealed diaphragm spring and a rubber gasket. This gasket is used to seal to radiator filler neck top surface. Use of proper
cap will allow coolant return to radiator.
