# ENGINE REPAIR

## ENGINE COOLING

### Radiator

#### REMOVAL AND INSTALLATION

1. Disconnect the negative battery cable.
2. Remove the cap and drain the radiator via the drain plug in the bottom tank. Be sure to only do this when the engine is cold.
3. If necessary to gain access, unbolt and set aside the power steering pump.

   NOTE: Do not disconnect the power steering pressure hoses or drain the system.

4. Disconnect the upper and lower radiator hoses, along with the coolant overflow reservoir hose.
5. On the 300ZX models, raise and safely support the vehicle, then remove the engine undercover.
6. If necessary, disconnect the water temperature switch electrical wiring.
7. Disconnect the fan motor wires and remove the fan/shroud assembly.
8. If equipped with an automatic transaxle, disconnect and cap the A/T oil cooling lines at the radiator.
9. Unbolt the radiator support brackets and remove the brackets.
10. Remove the radiator assembly from the vehicle.

    To install:

    NOTE: Be sure the rubber mounting bushings are in position before the radiator is installed.

11. Install the radiator to the vehicle.
12. Install radiator support brackets and tighten mounting nuts evenly.
13. Install the fan motor and blade to the shroud assembly. Tighten the fan shroud mounting bolts to 29–44 inch lbs. (3–5 Nm).
14. Install the remaining components in the opposite order from which they were removed.
15. Operate the engine until warm and then check for leaks. Check the coolant level and the fan operation.
16. If the A/T oil cooling lines were disconnected, check transaxle fluid level and add fluid as necessary.