RAM 2500 Truck 4WD V8-5.9L VIN Z LDC (1998)
Vacuum Check Valve HVAC: Service and Repair
REMOVAL
Vacuum Check Valve - Gasoline Engine
1. On models with a gasoline engine, unplug the vacuum supply line connector at the vacuum check valve. On models with a diesel engine, remove
the clamp from the vacuum supply line connector and unplug the connector from the vacuum check valve.
2. On models with a gasoline engine, note the orientation of the check valve in the vacuum supply line for correct reinstallation.
3. On models with a gasoline engine, unplug the vacuum check valve from the vacuum supply line fitting. On models with a diesel engine, unscrew
the check valve and nipple unit from the engine vacuum pump.
4. Reverse the removal procedures to install. On models with a diesel engine, tighten the check valve and nipple unit to 24 N.m (18 ft. lbs.).