RAM 3500 Truck 2WD V8-5.9L VIN Z LDC (1999)
Thermostat-3.9L V-6 Or 5.2/5.9L V-8 Gas Engines
6. Remove thermostat housing mounting bolts, thermostat housing, gasket and thermostat. Discard old gasket.
INSTALLATION
1. Clean mating areas of intake manifold and thermostat housing.
2. Install thermostat (spring side down) into recessed machined groove on intake manifold.
3. Install gasket on intake manifold and over thermostat.
4. Position the thermostat housing to the intake manifold.
Thermostat Position-3.9L V-6 Or 5.2/5.9L V-8 Gas Engines
Note: The word FRONT stamped on the housing. For adequate clearance, this must be placed towards the front of vehicle. The housing should be
slightly angled forward after installation to intake manifold.
5. Install two housing-to-intake manifold bolts. Tighten bolts to 23 Nm (200 inch lbs.) torque.
CAUTION: Housing must be tightened evenly and thermostat must be centered into recessed groove in intake manifold. If not, it may result in a
