Nissan Altima L32. Instruction — part 201
COOLING FAN
CO-41
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Disassembly and Assembly of Cooling Fan
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DISASSEMBLY
1. Remove fan blade nut.
2. Remove fan blade from fan motor.
3. Remove fan motor bolts and remove fan motor from fan shroud.
ASSEMBLY
Assembly is in the reverse order of disassembly.
AWBIA0739GB
1. Fan blade
2. Fan shroud
3. Fan motor
CO-42
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WATER PUMP
WATER PUMP
Removal and Installation
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WARNING:
Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure
coolant escaping from the radiator.
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.
REMOVAL
1. Drain engine coolant from the radiator. Refer to
CO-35, "Changing Engine Coolant"
CAUTION:
Perform when the engine is cold.
2. Remove engine coolant reservoir tank. Refer to
CO-38, "Removal and Installation"
3. Remove RH wheel and tire. Refer to
.
4. Remove the fender protector (RH). Refer to
EXT-19, "Removal and Installation"
(Coupe models) or
40, "Removal and Installation"
(Sedan models).
5. Remove drive belts.
6. Remove the drive belt auto tensioner and the idler pulley. Refer to
EM-122, "Removal and Installation of
.
7. Support engine and remove the front engine insulator and bracket. Refer to
.
8. Remove water drain plug on water pump side of cylinder block.
9. Remove IVT control valve cover and water pump cover.
10. Remove the timing chain tensioner assembly.
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1.
Water pump
2.
O-rings
WATER PUMP
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a. Pull the lever down to release the plunger stopper tab.
b. Insert the stopper pin into the tensioner body hole to hold the
lever and keep the plunger stopper tab released.
NOTE:
An allen wrench [(1.2 mm (0.047 in)] is used for a stopper pin as
an example.
c. Insert the plunger stopper tab into the tensioner body by press-
ing the slack guide.
d. Keep the slack guide pressed and hold the plunger stopper tab
in by pushing the stopper pin deeper through the lever and into
the chain tensioner body hole.
e. Make a gap between water pump gear and timing chain, by turn-
ing the crankshaft pulley approximately 20
° clockwise.
11. Remove chain tensioner.
CAUTION:
Be careful not to drop bolts inside chain case.
12. Remove the three water pump bolts. Make a gap between water
pump gear and timing chain, by turning crankshaft pulley coun-
terclockwise until timing chain loosens on water pump sprocket.
SLC444B
PBIC0848E
PBIC0849E
PBIC0850E
CO-44
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WATER PUMP
13. 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. Then, alternately tighten each bolt
for a half turn, and pull out the water pump.
CAUTION:
• Pull straight out while preventing vane from contacting
socket in installation area.
• Remove water pump without causing sprocket to contact
timing chain.
14. Remove M8 bolts and O-rings from water pump.
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.
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. 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.
• Insert water pump by tightening bolts alternately and evenly.
4. Remove dust and foreign material completely from backside of chain tensioner and from installation area
of rear timing chain case.
JLC357B
SLC943A
PBIC0855E
SLC031B
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