Ford Ranger Maintaince And Repair Manual page 282

2. Disconnect the heater return hose at the thermostat housing located on the left front lower side of
engine.
3. Remove the coolant outlet housing retaining bolts and slide the housing with the hose attached to one
side.
4. Remove the thermostat from the outlet.
5. Remove the gasket from the engine block and clean both mating surfaces.
It is good practice to check the operation of a new thermostat before it is installed in an engine. Place
the thermostat in a pan of boiling water. If it does not open more than
engine.
To install:
6. Coat a new gasket with water resistant sealer and position it on the outlet of the engine. The gasket
must be in place before the thermostat is installed.
7. Install the thermostat with the bridge (opposite end from the spring) inside the elbow connection and
turn it clockwise to lock it in position, with the bridge against the flats cast into the elbow connection.
8. Position the elbow connection onto the mounting surface of the outlet, so that the thermostat flange is
resting on the gasket and install the retaining bolts.
9. Connect the heater hose to the thermostat housing.
10. Fill the radiator and operate the engine until it reaches operating temperature. Check the coolant level
and adjust as necessary.
3.0L Engine
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 cable.
REMOVAL & INSTALLATION
HOW TO USE THIS BOOK
CAUTION
1
/ in., do not install it in the
4
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