Ford Ranger Maintaince And Repair Manual page 283

3. Remove the upper radiator hose.
4. Remove the thermostat housing bolts.
5. Remove the housing and thermostat as an assembly.
6. Remove the thermostat from the housing.
To install:
7. Clean all gasket material from the housing and engine.
8. Turn the thermostat clockwise into the housing until the thermostat bridge is perpendicular to the
mounting holes.
9. Position the housing on the engine, using a new gasket coated with sealer. Tighten the bolts to 5 ft.
lbs. (26 Nm).
10. Install the hose, fill and bleed the cooling system, connect the battery ground cable and start the
engine. Check for leaks.
2.9L and 4.0L Engines
1. Drain the cooling system.
When draining the coolant, keep in mind that cats and dogs are attracted by ethylene glycol antifreeze, and are
quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove
fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless
it is contaminated or several years old.
2. Disconnect the battery ground.
3. Remove the air cleaner duct assembly.
4. Remove the upper radiator hose.
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HOW TO USE THIS BOOK
Thermostat installation for the 3.0L engine
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CAUTION
REMOVAL & INSTALLATION