RAM 3500 Chassis Cab Truck 2WD L6-6.7L DSL Turbo (2010)
Radiator Cap: Testing and Inspection
Radiator Pressure Cap
RADIATOR CAP
Remove the cap from the radiator. Be sure that the sealing surfaces are clean. Moisten the rubber gasket with water and install the cap on the pressure
tester 7700 or an equivalent.
Operate the tester pump to bring the pressure to 104 kPa (15 psi) on the gauge. If the pressure cap fails to hold pressure of at least 97 kPa (14 psi)
replace the cap. Refer to the following CAUTION.
The pressure cap may test properly while positioned on tool 7700 (or equivalent). It may not hold pressure or vacuum when installed on the radiator. If
so, inspect the radiator filler neck and radiator cap's top gasket for damage. Also inspect for dirt or distortion that may prevent the cap from sealing
properly.
CAUTION: Radiator pressure testing tools are very sensitive to small air leaks which will not cause cooling system problems. A pressure cap
that does not have a history of coolant loss should not be replaced just because it leaks slowly when tested with this tool. Add
water to tool. Turn tool upside down and recheck pressure cap to confirm that cap needs replacement.
