Removal and Installation
WATER PUMP
Removal and Installation
WARNING:
Never 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 of a turn to release built-up pressure. Carefully remove radiator 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 should be replaced as a unit.
- After installing water pump, connect hose and clamp securely, then check for leaks using radiator cap tester.
NOTE:
When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spilling.
REMOVAL
1.Drain engine coolant from the radiator. Service and Repair.
CAUTION:
Perform when the engine is cold.
2.Remove coolant reservoir hose.
3.Remove coolant reservoir tank.
4.Remove RH wheel and tire. Adjustment.
5.Remove the fender protector side cover (RH). Coupe (Coupe models) or Sedan (Sedan models).
6.Set No. 1 cylinder at TDC on its compression stroke.
- Align pointer with TDC mark on crankshaft pulley.
7.Remove the idler pulley and the A/C idler pulley. Service and Repair.
8.Remove water drain plug (front) (1) on water pump side of cylinder block to drain engine coolant from engine.
9.Support engine and remove the front engine insulator and bracket. Removal and Replacement.
10.Disconnect RH IVT control valve connector and remove RH IVT control valve cover.
- Loosen the IVT control valve cover bolts in the reverse order as shown.
CAUTION:
The shaft in the IVT control valve cover is inserted into the center hole of the intake camshaft sprocket. Remove the
IVT control valve cover by pulling straight out until the IVT control valve cover disengages from the camshaft sprocket.
- A: Dowel pin hole
11.Remove water pump cover.
12.Remove the timing chain tensioner assembly 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.
13.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).
CO
14.Screw M8 bolts [pitch: 1.25 mm (0.49 in) length: approx. 50 mm (1.97 in)] into water pumps upper and lower bolt holes until they reach the timing chain case. Remove water pump.
CAUTION:
- Place a suitable shop cloth below the water pump housing to prevent any engine 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.
15.Remove M8 bolts and O-rings from water pump.
CAUTION:
Discard O-ring, do not reuse.
INSPECTION AFTER REMOVAL
- Visually check that there is no significant dirt or rusting on the water pump body and vane.
- Check that there is no looseness in the vane shaft, and that it turns smoothly when rotated by hand.
- If the water pump does not perform properly, replace the water pump assembly.
INSTALLATION
1.Install new O-rings to water pump.
CAUTION:
Discard O-ring, do not reuse.
2.Apply engine oil and coolant to the O-rings as shown.
- Locate the O-ring with white paint mark to engine front side.
3.Hold timing chain to the side (<--) and install the water pump (<--).
CAUTION:
Do not allow cylinder block to interfere with 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.
4.Remove dust and foreign material completely from installation area of timing chain tensioner and rear timing chain case.
5.Turn the crankshaft pulley approximately 20� clockwise so that the timing chain on the timing chain tensioner side is loose.
6.Apply engine oil to the oil feed hole and timing chain tensioner and install the timing chain tensioner.
7.Remove the stopper pin (A).
8.Install IVT control valve cover and water pump cover.
a.Before installing, remove all traces of liquid gasket from mating surface of water pump cover and IVT control valve 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 control valve cover and water pump cover.
Use Genuine RTV Silicone Sealant or equivalent. Recommended Chemical Products And Sealants.
c.Tighten IVT control valve cover bolts in numerical order as shown.
- A: Dowel pin hole
9.Install water drain plug (front) (1) on water pump side of cylinder block.
- Apply liquid gasket to the threads of water drain plug (front).
Use Genuine RTV Silicone Sealant or equivalent. Recommended Chemical Products And Sealants.
Water drain plug (front): 9.8 Nm (1.0 kg-m, 87 in-lb)
10.Installation of remaining components is in the reverse order of removal.
CAUTION:
Do not spill coolant in engine compartment. Use a shop cloth to absorb coolant.
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. Recommended Chemical Products And Sealants (United States and Canada) or Recommended Chemical Products And Sealants (Mexico).
- 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:
