Nissan Altima 2007-2012 Service Manual: Thermostat and thermostat housing

Removal and Installation

1. Gasket

2. Thermostat assembly

WARNING: Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure coolant escaping from the radiator.

REMOVAL

CAUTION: Perform when engine is cool.

1. Drain engine coolant from the radiator. Refer to CO-35, "Changing Engine Coolant".

2. Remove drive belts. Refer to EM-121, "Removal and Installation".

3. Remove water drain plug on water pump side of the engine. Refer to EM-206, "Disassembly and Assembly".

4. Disconnect lower radiator hose.

5. Remove engine coolant inlet and thermostat assembly.

• Do not disassemble engine coolant inlet and thermostat.

Replace them as a unit, if necessary.

INSPECTION AFTER REMOVAL

• Place a thread so that it is caught in the valves of the thermostat.

Immerse fully in a container filled with water. Heat while stirring.

• The valve opening temperature is the temperature at which the valve opens and the falls from the thread.

• Continue heating. Check the full-open lift amount.

NOTE: The full-open lift amount standard temperature for the thermostat is the reference value.

• After checking the full-open lift amount, lower the water temperature and check the valve closing temperature.

INSTALLATION

Installation is in the reverse order of removal.

• Install thermostat with jiggle valve facing upward.

• After installation refill engine coolant and check for leaks. Refer to CO-35, "Changing Engine Coolant" and CO-34, "System Inspection".

CAUTION: Do not spill coolant in engine compartment. Use a shop cloth to absorb coolant.

    Water pump
    Removal and Installation 1. Water pump 2. O-rings WARNING: Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure coolant escaping from the radiato ...

    Water outlet and water piping
    Removal and Installation 1. Water outlet 2. Gasket 3. O-ring 4. Heater pipe 5. Water connector 6. Water bypass pipe 7. Engine coolant temperature sensor 8. Washer A. To electric throttle co ...

    Other materials:

    Capacities and recommended fuel/lubricants
    The following are approximate capacities. The actual refill capacities may be slightly different. When refilling, follow the procedure described in the “Maintenance and do-it-yourself” section to determine the proper refill capacity. *1: For further details, see “Engine oil and oil fil ...

    Blower motor
    Description SYSTEM DESCRIPTION Component Parts Fan speed control system components are: • Front air control • A/C LAN system (PBR built-in mode door motor, air mix door motor and intake door motor) System Operation Component Function Check INSPECTION FLOW 1. CONFIRM SYMPTOM BY PERF ...

    P2127, P2128 APP Sensor
    Description The accelerator pedal position sensor is installed on the upper end of the accelerator pedal assembly. The sensor detects the accelerator position and sends a signal to the ECM. Accelerator pedal position sensor has two sensors. These sensors are a kind of potentiometer which tran ...