RAM 2500 Truck 4WD L6-359 5.9L DSL Turbo VIN D FI (1998)
When the engine is off, the check valve will be in the open position. When the engine is operating, the check valve will be in the closed position.
One-Way Check Valve (Jiggle Pin) Location
The check valve is located inside of a brass fitting. This fitting is threaded into the front of the cylinder head. It is connected to the thermostat housing
with a rubber hose and screw-type clamps.
