Nissan Altima Owners Manual: Engine cooling system

The engine cooling system is filled at the factory with a pre-diluted mixture of 50% Genuine NISSAN Engine Coolant (blue) and 50% water to provide year-round anti-freeze and coolant protection. The anti-freeze solution contains rust and corrosion inhibitors. Additional engine cooling system additives are not necessary.

WARNING

● Never remove the radiator or coolant reservoir cap when the engine is hot.

Wait until the engine and radiator cool down. Serious burns could be caused by high pressure fluid escaping from the radiator. See precautions in “If your vehicle overheats” found in the “In case of emergency” section of this manual.

● The radiator is equipped with a pressure type radiator cap. To prevent engine damage, use only a genuine NISSAN radiator cap.

CAUTION

● Never use any cooling system additives such as radiator sealer. Additives may clog the cooling system and cause damage to the engine, transmission, and/or cooling system.

● When adding or replacing coolant, be sure to use only Genuine NISSAN Long Life Antifreeze/Coolant (blue) or equivalent. Genuine NISSAN Long Life Antifreeze/Coolant (blue) is pre-diluted to provide antifreeze protection to -34° F (-37° C). If additional freeze protection is needed due to weather where you operate your vehicle, add Genuine NISSAN Long Life Antifreeze/Coolant (blue) concentrate following the directions on the container. If an equivalent coolant other than Genuine NISSAN Long Life Antifreeze/Coolant (blue) is used, follow the coolant manufacturer’s instructions to maintain minimum antifreeze protection to -34° F (-37° C). The use of other types of coolant solutions other than Genuine NISSAN Long Life Antifreeze/Coolant (blue) or equivalent may damage the engine cooling system.

● The life expectancy of the factory-fill coolant is 105,000 miles (168,000 km) or 7 years. Mixing any other type of coolant other than Genuine NISSAN Long Life Antifreeze/Coolant (blue), including Genuine NISSAN Long Life Antifreeze/Coolant (green), or the use of non-distilled water will reduce the life expectancy of the factory-fill coolant.

Refer to the NISSAN Service and Maintenance Guide for more details.

Engine compartment check locations
QR25DE engine 1. Power steering fluid reservoir 2. Engine coolant reservoir 3. Engine oil filler cap 4. Brake fluid reservoir 5. Air cleaner 6. Fuse block/ Fusible links 7. Battery 8. Engine ...

Checking engine coolant level
Check the coolant level in the reservoir when the engine is cold. If the coolant level is below the MIN level B , add coolant to the MAX level A . If the reservoir is empty, check the coolant le ...

Other materials:

B terminal circuit
Description The “B” terminal is constantly supplied with battery power. Diagnosis Procedure CAUTION: Perform diagnosis under the condition that the engine cannot start by the following procedure. 1. Remove fuel pump fuse. 2. Crank or start the engine (where possible) until the ...

Multiport fuel injection system
System Diagram System Description INPUT/OUTPUT SIGNAL CHART *1: This sensor is not used to control the engine system under normal conditions. *2: This signal is sent to the ECM through CAN communication line. *3: ECM determines the start signal status by the signals of engine speed and ...

Radiator
Removal and Installation 1. Radiator 2. CVT oil cooler hose (if equipped) 3. Radiator hose (upper) 4. Radiator hose (lower) 5. Cooling fan 6. Reservoir tank 7. Reservoir hose 8. Radiator filler cap 9. Clamps A. To CVT (if equipped) B. To water outlet C. To water inlet WARNING: Never ...