Nissan Murano: Removal and Installation / Water Pump

Exploded View

WARNING:

Do not remove the radiator cap when the engine is hot. Serious burns could occur from high pressure engine coolant escaping from the radiator. Wrap a thick cloth around the cap. Slowly turn it a quarter turn to allow built-up pressure to escape. Carefully remove the cap by turning it all the way.

CAUTION:

• When removing water pump assembly, be careful not to get engine coolant on drive belt.

• Water pump cannot be disassembled and must be replaced as a unit.

• After installing the water pump, connect hose and clamp securely, then check for leaks. Repair as necessary.

NOTE:

When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spilling.

REMOVAL

Disconnect the negative battery terminal. Refer to Removal and Installation.

Remove the engine room cover. Refer to Removal and Installation.

Remove front under cover. Refer to Removal and Installation.

Drain engine coolant from the radiator. Refer to Changing Engine Coolant.

CAUTION:

Perform when the engine is cold.

Drain power steering fluid. Refer to Draining and Refilling.

Remove the cowl top cover and the cowl top extension. Refer to Exploded View.

Remove sub tank bracket from cowl top extension.

Remove brake fluid level sensor harness connector from brake fluid level sensor.

Remove strut tower brace.

Remove front air duct. Refer to Removal and Installation.

Remove the front road wheel and tire (RH) using a power tool. Refer to Removal and Installation.

Remove the fender protector (RH). Refer to Removal and Installation.

Disconnect engine coolant reservoir hose and remove engine coolant reservoir tank.

Set No. 1 cylinder at TDC on its compression stroke.

• Align pointer with TDC mark on crankshaft pulley.

Remove drive belt. Refer to Removal and Installation.

Remove the drive belt auto-tensioner assembly. Refer to Removal and Installation of Drive Belt Auto-Tensioner.

Drain engine coolant from cylinder block (if necessary). Refer to Changing Engine Coolant.

Remove the E-PSF cover, bracket and motor. Refer to Removal and Installation.

Support engine and remove the RH engine insulator and bracket. Refer to Exploded View.

Disconnect the A/C lines at the junction. Refer to Exploded View.

Disconnect RH valve timing control connectors and remove valve timing control cover (bank 1). Refer to Exploded View.

Remove water pump cover. Refer to Exploded View.

Remove the timing chain tensioner (primary) as follows:Pull the lever (C) down to release the plunger stopper tab (B).

NOTE:

An allen wrench (1.2 mm (0.047 in) is used for a stopper pin (A) as an example.

CAUTION:

Be careful not to drop timing chain tensioner bolts inside timing chain case.

Remove the three water pump bolts (A). Make a gap between water pump sprocket (1) and timing chain by carefully turning crankshaft pulley (2) counterclockwise until timing chain loosens on water pump sprocket (1).

CAUTION:

Be careful not to drop water pump bolts inside timing chain case.

Screw M8 bolts [pitch: 1.25 mm (0.49 in) length: approx. 50 mm (1.97in)] into water pumps upper and lower bolt holes until they reach the timing chain case.

Hold the timing chain to the side using a suitable tool and alternately tighten the M8 bolts for a half turn until the water pump can be removed.

CAUTION:

• Place a suitable shop cloth below the water pump housing to prevent any engine coolant from dripping into the timing chain case.

• Remove water pump without causing sprocket to contact timing chain.

• Pull water pump straight out while preventing vane from contacting the engine block and timing chain case.

• It may be necessary to adjust the timing chain until it loosens enough to remove the water pump.

Remove M8 bolts and O-rings from water pump.

CAUTION:

Do not reuse O-rings.

INSPECTION AFTER REMOVAL

• Visually check for significant dirt or rust on the water pump body and vane.

  

• Check that the vane shaft turns smoothly by hand and is not excessively loose.

• Replace the water pump assembly if the water pump does not perform properly.

INSTALLATION

Install new O-rings to water pump (1).

CAUTION:

Do not reuse O-rings.

Hold timing chain to the side and install the water pump.

CAUTION:

• Install water pump without causing sprocket to contact timing chain.

• It may be necessary to adjust the timing chain until it loosens enough to install the water pump.

• Install water pump straight in while preventing vane from contacting the engine block and timing chain case.

• Be careful not to damage the O-rings when installing the water pump.

• Check that timing chain and water pump sprocket are engaged.

• Tighten water pump bolts alternately and evenly to specification.

Remove dust and foreign material completely from installation area of timing chain tensioner and rear timing chain case.

Turn crankshaft pulley (1) approximately 20° clockwise so that timing chain on timing chain tensioner side is loose.

Apply engine oil to the oil feed hole and timing chain tensioner and install the timing chain tensioner.

Remove the stopper pin (A).

Install valve timing control cover (bank 1) and water pump cover.Before installing, remove all traces of liquid gasket from mating surface of water pump cover and IVT cover using a scraper.

Also remove traces of liquid gasket from the mating surface of the front cover.

CAUTION:

• Installation should be done within 5 minutes after applying liquid gasket.

• Do not fill the engine with engine oil for at least 30 minutes after the components are installed to allow the sealant to cure.

Installation of remaining components is in the reverse order of removal.

• After installation, refill engine coolant and check for leaks. Refer to Changing Engine Coolant and System Inspection.

  CAUTION:

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

• Refill power steering fluid. Refer to Draining and Refilling.

• After starting engine, let idle for three minutes then rev engine up to 3,000 rpm under no load to purge air from the high-pressure chamber of the chain tensioner. The engine may produce a rattling noise. This indicates that air still remains in the chamber and is not a matter of concern.

INSPECTION AFTER INSTALLATION

• Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required quantity, fill to the specified level. Refer to Fluids and Lubricants.

• Use procedure below to check for fuel leaks.

• Turn ignition switch ON (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leaks at connection points.

• Start engine. With engine speed increased, check again for fuel leaks at connection points.

• Run engine to check for unusual noise and vibration.

  NOTE:

  If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop after hydraulic pressure rises.

• Warm up engine thoroughly to make sure there are no leaks of fuel, exhaust gas, or any oils/fluids including engine oil and engine coolant.

• Bleed air from passages in lines and hoses, such as in cooling system.

• After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to specified level, if necessary.

• Summary of the inspection items:

  Item		Before starting engine	Engine running	After engine stopped
  Engine coolant		Level	Leakage	Level
  Engine oil		Level	Leakage	Level
  Transmission/transaxle fluid	A/T and CVT Models	Leakage	Level/Leakage	Leakage
  	M/T Models	Level/Leakage	Leakage	Level/Leakage
  Other oils and fluids*		Level	Leakage	Level
  Fuel		Leakage	Leakage	Leakage
  Exhaust gas		—	Leakage	—

  *Power steering fluid, brake fluid, etc.