Mechanics

CHANGING RADIATOR

1993 Geo Prizm

Engine Cooling problem
1993 Geo Prizm 4 cyl Front Wheel Drive Automatic 144000 miles

what caution do I need when remove and replace a radiator?
Avatar
Hainguyen
August 7, 2009.




Disconnect the negative battery cable.
Drain the coolant by opening the engine block and radiator drain cocks. Collect the coolant in a clean container and save for reuse.

When draining the coolant, keep in mind that cats and dogs are attracted by the 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.

Remove the coolant overflow reservoir.
Disconnect the upper radiator hose from the radiator and the lower radiator hose from the thermostat housing.
If equipped with automatic transmission, disconnect the oil cooler lines running to the radiator.
Remove the upper radiator brackets.
Disconnect the wiring running to the fan(s).
Remove the radiator and fan assembly from the car. If the radiator is to be worked on or replaced, the fan and shroud assembly, the lower hose and the lower rubber mounts must be removed. Don't forget to install them on the new unit before installing it.
With the necessary parts mounted on the radiator, install the radiator in the car. Install the upper mounting brackets. Tighten them to 7.5 ft. Lbs. (89 inch lbs.)
Install the oil cooler hoses to the radiator if equipped with automatic transmission.
Connect the electrical lead(s) to the fan(s).
Replace the coolant overflow reservoir and connect the hose.
Install and secure the upper and lower radiator hoses. Use new clamps.
Connect the negative battery cable.
Confirm that the draincocks on the engine and radiator are closed. Refill the cooling system with the proper amount of engine coolant.
Add automatic transmission fluid in an amount equal to that lost from the oil cooler during removal.
Start the engine and check hose and line connections for leaks. Allow the engine to warm up to normal operating temperature. Check carefully for leaks under both cold and hot conditions.
Check the automatic transmission fluid and add if necessary.



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