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Engine Cooling System: Overhaul Nissan 350Z I

Cooling System (Mechanical) 7 illustrations ~337 words

DISASSEMBLY

  1. Remove fans from fan motors.
  2. Remove fan motors from fan shroud.

ASSEMBLY

Install in the reverse order of disassembly.

Scheme 17

Scheme 17: Removal and Installation
Scheme 17: Removal and Installation
CAUTIONWhen removing water pump assembly, be careful not to get engine coolant on drive belt. Water pump cannot be disassembled and should be replaced as a unit. After installing water pump, connect hose and clamp securely, then check for leaks using radiator cap tester.

Scheme 18

Scheme 18: REMOVAL
Scheme 18: REMOVAL

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Scheme 23
  1. Remove undercover using power tools.
  2. Remove drive belts. Refer to , " «REMOVAL AND INSTALLATION»(ref-170482-S00854522182005011000000) "
  3. Drain engine coolant from radiator. Refer to " «DRAINING ENGINE COOLANT»(ref-212004-S25580840632005122300000) "Changing Engine Coolant". CAUTION: Perform when the engine is cold.
  4. Remove water drain plug on water pump side of cylinder block.
  5. Remove chain tensioner cover and water pump cover.
  6. Remove the chain tensioner assembly with the following procedure. Pull the lever down and release the plunger stopper tab. Plunger stopper tab can be pushed up to release (coaxial structure with lever). Insert the stopper pin into the tensioner body hole to hold the lever and keep the stopper tab released. NOTE: An Allen wrench [2.5 mm (0.098 in)] is used for a stopper pin as an example. Insert the plunger into the tensioner body by pressing the timing chain slack guide. Keep the slack guide pressed and hold the plunger in by pushing the stopper pin deeper through the lever and into the tensioner body hole. Turn crankshaft pulley approximately 20° clockwise so that the timing chain on the chain tensioner side is loose.
  7. Remove chain tensioner. CAUTION: Be careful not to drop mounting bolts inside chain case.
  8. Remove the 3 water pump fixing bolts. Secure a gap between water pump gear and timing chain, by turning crankshaft pulley counterclockwise until timing chain looseness on water pump sprocket becomes maximum.
  9. Screw M8 bolts [pitch: 1.25 mm (0.049 in) length: approx. 50 mm (1.97 in)] into water pumps upper and lower mounting-bolt holes until they reach timing chain case. Then, alternately tighten each bolt for a half turn, and pull out water pump. Pull straight out while preventing vane from contacting socket in installation area. Remove water pump without causing sprocket to contact timing chain.
  10. Remove M8 bolts and O-rings from water pump.

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