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Engine Cooling System: Maintenance Nissan Pathfinder III

Cooling Fan 5 illustrations ~371 words

FLUSHING COOLING SYSTEM

  1. Drain the water from the engine cooling system. Refer to " «DRAINING ENGINE COOLANT»(ref-272537-S20500383622007112100000) ".
  2. Fill the radiator and the reservoir tank (to the "MAX" line), with water. Reinstall the radiator cap and leave the vented reservoir cap off.
  3. Run the engine until it reaches normal operating temperature.
  4. Press the engine accelerator two or three times under no-load.
  5. Stop the engine and wait until it cools down.
  6. Drain the water from the engine cooling system. Refer to " «DRAINING ENGINE COOLANT»(ref-272537-S20500383622007112100000) ".
  7. Repeat steps 2 through 6 until clear water begins to drain from the radiator.

Scheme 26

Fig. 15: Identifying Radiator Components With Torque Specifications
Scheme 15: Identifying Radiator Components With Torque Specifications
WARNINGDo not remove radiator cap when engine is hot. Serious burns could occur from high-pressure engine coolant escaping from radiator. Wrap a thick cloth around the cap. Slowly turn it a quarter of a turn to release built-up pressure. Carefully remove radiator cap by turning it all the way.

Scheme 27

Scheme 27: REMOVAL
Scheme 27: REMOVAL

Scheme 28

Scheme 28
Scheme 28

Scheme 29

Scheme 29
Scheme 29

Scheme 30

Scheme 30
Scheme 30
  1. Remove engine cover with power tool. Refer to " «REMOVAL AND INSTALLATION»(ref-272536-S06477324502007112100000) ".
  2. Drain engine coolant from radiator. Refer to " «ENGINE COOLANT»(ref-272537-S37144720002007112100000) ". CAUTION: Perform this step when engine is cold. Do not spill engine coolant on drive belts.
  3. Remove air duct and air cleaner case assembly. Refer to " «REMOVAL AND INSTALLATION»(ref-272536-S36331754392007112100000) ".
  4. Remove reservoir tank hose.
  5. Removal radiator hoses (upper and lower) and reservoir tank hose. CAUTION: Be careful not to allow engine coolant to contact drive belts.
  6. Remove radiator cooling fan assembly. Refer to " «ENGINE COOLING FAN»(ref-272537-S26451072492007112100000) ".
  7. Disconnect A/T fluid cooler hoses. Install blind plug to avoid leakage of A/T fluid.
  8. Remove the upper mount bracket bolts. see scheme 16: Identifying Upper Mount Bracket Bolts
  9. Remove the two A/C condenser bolts. see scheme 17: Identifying A/C Condenser Bolts
  10. Remove radiator as follows: CAUTION: Do not damage or scratch A/C condenser and radiator core when removing. With lifting and pulling radiator in a rear direction, disassemble lower mount from radiator core support center. CAUTION: Because A/C condenser is onto the front-lower portion of radiator, moving to rear direction should be at minimum. see scheme 18: Disassembling Lower Mount From Radiator Core Support Center Lift A/C condenser up and remove radiator after disengaging the fitting as front-bottom surface. CAUTION: Lifting A/C condenser should be minimum to prevent a load to A/C piping. After removing radiator, put A/C condenser on radiator core support center to prevent a load to A/C piping, and temporarily fix it with rope or similar means. (Scheme 26): Lifting A/C Condenser

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