Removal and Installation
WATER PUMP
Removal and Installation
WARNING:
Do not remove the radiator cap when the engine is hot. Serious burns could occur from high pressure 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 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
1.Disconnect the negative battery terminal. Refer to "Removal and Installation" Removal and Installation.
2.Remove the engine room cover: Refer to "Removal and Installation" Exploded View.
3.Remove front air duct. Refer to "Removal and Installation" Removal and Installation.
4.Remove engine under cover. Refer to "Exploded View" Exploded View.
5.Drain coolant from the radiator. Refer to "Changing Engine Coolant" Service and Repair.
CAUTION:
Perform when the engine is cold.
6.Drain the power steering fluid reservoir. Refer to "Draining and Refilling" Removal and Replacement.
7.Remove the front road wheel and tire (RH). Refer to "Adjustment" Service and Repair.
8.Remove the fender protector (RH). Refer to "FENDER PROTECTOR : Removal and Installation" Removal and Installation.
9.Disconnect coolant reservoir hose and remove coolant reservoir tank.
10.Set No. 1 cylinder at TDC on its compression stroke.
- Align pointer with TDC mark on crankshaft pulley.
Revision: March 20122013 Infiniti JX
11.Remove drive belt. Refer to "Removal and Installation" Removal and Installation.
12.Remove the drive belt auto-tensioner assembly. Refer to "Removal and Installation of Drive Belt Auto-tensioner" Service and Repair.
13.Remove cylinder block water drain plug and copper sealing washer to drain coolant from engine.
CAUTION:
Do not reuse copper sealing washers.
14.Remove the E-PSF cover, bracket and motor. Refer to "Removal and Installation" Removal and Installation.
15.Support engine and remove the RH engine insulator and bracket. Refer to "AWD : Exploded View" Exploded View.
16.Disconnect the A/C lines at the junction. Refer to "HIGH-PRESSURE PIPE : Removal and Installation" High-Pressure Pipe.
17.Disconnect RH valve timing control connectors and remove valve timing control cover (bank 1). Refer to
"Exploded View" Exploded View.
18.Remove water pump cover. Refer to "Exploded View" Exploded View.
19.Remove the timing chain tensioner (primary) as follows:
a.Pull the lever (C) down to release the plunger stopper tab (B).
b.Insert the stopper pin A into the tensioner body hole to hold the lever (C) and keep the plunger stopper tab (B) released.
NOTE:
An allen wrench [(1.2 mm (0.047 in)] is used for a stopper pin A
as an example.
c.Compress the plunger (D) into the tensioner body (1) by pressing the slack guide (2).
d.Keep the slack guide (2) pressed and lock the plunger (D) in by pushing the stopper pin A through the lever (C) and into the chain tensioner body hole.
e.Remove timing chain tensioner bolts and then remove the timing chain tensioner.
CAUTION:
Be careful not to drop timing chain tensioner bolts inside timing chain case.
20.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).
Revision: March 20122013 Infiniti JX
21.Remove water pump:
a.Screw M8 bolts approximately 50 mm (1.97 in) into water pump upper and lower bolt holes until they reach the timing chain case
[M8 bolt pitch 1.25 mm (0.49 in) length].
CAUTION:
- Place a suitable shop cloth below the water pump housing to prevent any coolant from dripping into the timing chain case.
- Pull water pump straight out while preventing vane from contacting socket in installation area.
- Remove water pump without causing sprocket to contact timing chain.
b.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
1.Install new O-rings on water pump.
CAUTION:
Do not reuse O-rings.
a.Apply engine oil and coolant to the O-rings as shown.
b.Locate the O-ring with white paint mark to engine front side.
2.Hold timing chain to the side (black arrow) and install the water pump (black arrow).
CAUTION:
Do not allow the O-rings to be damaged by the cylinder block when installing the water pump.
- Check that timing chain and water pump sprocket are engaged.
- Tighten water pump bolts alternately and evenly to specification.
3.Remove dust and foreign material completely from installation area of timing chain tensioner and rear timing chain case.
Revision: March 20122013 Infiniti JX
4.Turn the crankshaft pulley approximately 20� clockwise so that the timing chain on the timing chain tensioner side is loose.
5.Apply engine oil to the oil feed hole and timing chain tensioner and install the timing chain tensioner.
6.Remove the stopper pin (A).
7.Install valve timing control cover (bank 1) and water pump cover.
a.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.
b.Apply a continuous bead of liquid gasket to mating surface of IVT cover and water pump cover. Use Genuine RTV Silicone Sealant or equivalent. Refer to "Recommended Chemical Products and Sealants" Recommended Chemical Products and Sealants.
CAUTION:
- Installation should be done within 5 minutes after applying liquid gasket.
- Do not fill the engine with oil for at least 30 minutes after the components are installed to allow the sealant to cure.
8.Install cylinder block water drain plug (A) and copper sealing washer (B).
CAUTION:
Do not reuse copper sealing washers.
- Apply liquid gasket to the threads of cylinder block front drain plug.
Use Genuine RTV Silicone Sealant or equivalent. Refer to GI-22, "Recommended Chemical Products and Sealants" Recommended Chemical Products and Sealants.
Cylinder block front drain plug: Refer to Refer to EM-112, "Disassembly" Disassembly and Assembly.
9.Installation of remaining components is in the reverse order of removal.
- After installation, refill coolant and check for leaks. Refer to "Changing Engine Coolant" Service and Repair and CO10, "System Inspection".
CAUTION:
Do not spill coolant in engine compartment. Use a shop cloth to absorb coolant.
- 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.
Revision: March 20122013 Infiniti JX
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.
- Use procedure below to check for fuel leakage.
- Turn ignition switch ON (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leakage at connection points.
- Start engine. With engine speed increased, check again for fuel leakage 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 is no leakage 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:
Revision: March 20122013 Infiniti JX