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CO-12 < ON-VEHICLE MAINTENANCE > [VQ40DE] ENGINE COOLANT • Check reservoir cap relief pressure using suitable tool and Tool. NOTE: • Replace the reservoir cap if there is any damage in the negative- pressure valve, or if the open-valve pressure is outside of the limit. CHECKING RADIATOR CAP Inspect the radiator cap. metal retainer. CHECKING RADIATOR Check radiator for mud or clogging. If necessary, clean radiator as follows. CAUTION: • Be careful not to bend or damage the radiator fins. and horns. Then tape the harness and electrical connectors to prevent water from entering. 1. Apply water by hose to the back side of the radiator core, with the hose pointed vertically downward. 2. Apply water again to all radiator core surfaces once per minute. 3. Stop washing if any stains no longer flow out from the radiator. 4. Blow air into the back side of radiator core, with the air hose pointed vertically downward. 2 , 71 psi) and keep distance more than 30 cm (11.8 in). 5. Blow air again into all the radiator core surfaces once per minute until no water sprays out. 6. Check for leaks. Changing Engine Coolant INFOID:0000000003939391 WARNING: • To avoid being scalded, never change the coolant when the engine is hot. to release any built-up pressure, then push down and turn the cap all the way to remove it. DRAINING ENGINE COOLANT 1. Turn ignition switch ON and set temperature control lever all the way to HOT position or the highest tem- 2. Remove the engine front undercover using power tool. 3. Open the radiator drain plug at the bottom of the radiator, and CAUTION: Do not allow the coolant to contact the drive belts. Tool number : EG17650301 (J-33984-A) Standard: 78 – 98 kPa (0.8 – 1.0 kg/cm 2 , 11 – 14 psi) Limit: 59 kPa (0.6 kg/cm 2 , 9 psi) WBIA0570E LLIA0070E 2009 Pathfinder |