Bronco Full Size L6-300 4.9L (1987)
temperature will slow down after clutch engagement, but it will continue to rise as long as the radiator remains covered.
d.
If this is not the concern, go to Step 11.
11.
Check for fan disengagement...
a.
After completion of the above tests, shut off the engine.
b.
Remove the cardboard cover from the front of the radiator.
c.
Restart and return the gas engine to 2700 to 3000 rpm or diesel engine at 2100 to 2300 rpm, continuing to watch the coolant temperature
which will begin to decrease. The fan rpm will drop to a reduced noise level where it was before the cycle began which indicates that the fan
clutch has disengaged.
d.
If the fan clutch remains engaged and the coolant temperature has dropped below the thermostat opening temperature (as noted in Step 9)
for at least five minutes, the fan clutch should be replaced. Refer to the Dealer Master Parts Catalog for correct parts usage. Refer to the
appropriate Service Manual, Section 03-05, for service details.
e.
Repeat the test procedure after fan clutch replacement to confirm the fix and to assure customer satisfaction.
WARRANTY STATUS AND OPERATION DESCRIPTION
