Mustang GT V8-4.6L SOHC VIN X (1998)
Fig. 40 Thermostat Housing
1. Install the water thermostat and O-ring.
2. Install and alternately tighten the two retaining bolts. Tighten bolts to 20-30 Nm (15-22 ft. lbs.).
3. Connect the upper radiator hose to the water hose connection.
4. Fill the engine cooling system with Ford Premium Cooling System Fluid E2FZ-19549-AA or -B. in Oregon, F5FZ-19549-CC, in Canada,
Motorcraft CXC-8-B recycled coolant or equivalent meeting Ford specification ESE-M97B44-A in a 50/50 mixture with water.
5. Start the engine and check all hoses and connections for leaks. Allow the engine to warm up so that the water thermostat opens.
6. Stop the engine. Top off degas bottle as required to maintain minimum cold fill level.
