2006 ACURA CSX water pump

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ItemMeasurement Qualification Specification
2-20Design Specifications
DIMENSIONS Overall length
4.544 mm (178.9 in.)
Overall width 1,752 mm (69.0 in.)
Overall height 1,435 mm (56.5 in.)
Wheelbase 2,700 mm (106.3 in.)
Track Front1,499 mm (59.0 in.)
Rear 1,528 mm (60.2 in.)
Ground clearance 145 mm (5.7 in.)
Seating capacity Five (5)
WEIGHT Gross Vehicle Weight Rating
(GVWR) See the certification label attached to the driver’s doorjamb
ENGINE Type Water cooled, 4-stroke DOHC i-VTEC engine
Cylinder arrangement Inline 4-cylinder, transverse
Boreandstroke 86x86mm(3.39x3.39in.)
Displacement 1,998 cm (122 cu in.)
Compression ratio K20Z29.6
K20Z3 11.0
Valve train Chain drive, DOHC i-VTEC 4 valves per cylinder
Lubrication system Forced, wet sump, with trochoid pump
Fuel required K20Z2Regular UNLEADED gasoline 87 Pump Octane Number or
higher
K20Z3 Premium UNLEADED gasoline 91 Pump Octane Number or
higher
STARTER Type Gear Reduction
Nominal output 1.6 kW
Nominal voltage 12 V
Hour rating 30 seconds
Direction of rotation Clockwise as viewed from drive end
CLUTCH Type Single plate dry, diaphragm spring
Clutch friction material surface area 174 cm (27 sq in.)
3
2
08/08/21 14:07:17 61SNR030_020_0020
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Engine Cooling
Cooling System
Fan Controls
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Component Location Index
. 10-2
Radiator Cap Test . 10-4
Radiator Test . 10-4
Fan Motor Test . 10-5
Thermostat Test . 10-5
Water Pump Inspection . 10-6
Water Pump Replacement . 10-6
Coolant Check . 10-7
Coolant Replacement . 10-8
Thermostat Replacement . 10-10
Water Passage Replacement . 10-11
EGR Passage Removal and Installation . 10-13
Water Outlet Removal and Installation . 10-16
Radiator and Fan Replacement . 10-19
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Component Location Index
. 10-23
Symptom Troubleshooting Index . 10-24
Circuit Diagram . 10-25
Radiator Fan High Speed Circuit Troubleshooting . 10-26
08/08/21 14:39:50 61SNR030_100_0001
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10-2Cooling System
Component Location Index
THERMOSTAT
RADIATOR
ENGINE COOLANT TEMPERATURE
(ECT) SENSOR 2
WATER PUMP
A/C CONDENSER FAN ASSEMBLY RADIATOR FAN ASSEMBLY
WATER PASSAGE COOLANT SEPARATOR
EXHAUST GAS RECIRCULATION
(EGR) PASSAGE
Test, page 10-5
Replacement, page 10-10
Replacement,
page 10-19Inspection, page 10-6
Replacement, page 10-6
Replacement, page 10-19
Fan Motor Test, page 10-5 Replacement, page 10-19
Fan Motor Test, page 10-5
Replacement,
page 10-11 Replacement, page 10-13
08/08/21 14:39:53 61SNR030_100_0002
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K20Z3 engine
10-3
THERMOSTAT
RADIATOR
ENGINE COOLANT TEMPERATURE
(ECT) SENSOR 2
WATER PUMP
A/C CONDENSER FAN ASSEMBLY RADIATOR FAN ASSEMBLY WATER OUTLET
COOLANT SEPARATOR
OIL COOLER
WATER PASSAGE
Test, page 10-5
Replacement, page 10-10
Replacement, page 10-19
Inspection, page 10-6
Replacement, page 10-6
Replacement, page 10-19
Fan Motor Test, page 10-5 Replacement, page 10-19
Fan Motor Test, page 10-5 Replacement, page 10-16
Replacement, page 10-11
08/08/21 14:39:56 61SNR030_100_0003
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K20Z2 engine
10-610-6 Cooling System
Water Pump Inspection
Water Pump Replacement
A
A
B
A
6x1.0mm
12 N·m (1.2 kgf·m, 8.7 lbf·ft)
1. Remove the drive belt (see page 4-31).
2. Turn the water pump pulley counterclockwise, and check that it turns freely and smoothly. If it does not
turn smoothly, replace the water pump (see page
10-6).
NOTE: When you check the water pump, you may
see a small amount of ‘‘weeping’’ from the bleed
holes (A). This is normal.
3. Install the drive belt (see page 4-31). 1. Remove the drive belt (see page 4-31).
2. Drain the engine coolant (see page 10-8).
3. Remove the drive belt auto-tensioner pulley
(see page 4-33).
4. Remove the crankshaft pulley (see page 6-16).
5. Remove the six bolts securing the water pump, then remove the water pump (A).
6. Inspect, and clean the O-ring groove and mating surface of the water passage.
7. Install the water pump with a new O-ring (B).
8. Clean up any spilled engine coolant.
9. Install the crankshaft pulley (see page 6-17).
10. Install the drive belt auto-tensioner pulley (see page 4-33).
11. Install the drive belt (see page 4-31).
12. Refill the radiator with engine coolant, and bleed the air from the cooling system with the heater
valve open (see step 6 on page 10-8).
08/08/21 14:39:57 61SNR030_100_0006
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K20Z3 engine
10-710-7
Coolant Check
A B
C
6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft) C A
B
1. Remove the drive belt (see page 4-31).
2. Drain the engine coolant (see page 10-8).
3. Remove the drive belt auto-tensioner pulley (see page 4-33).
4. Remove the crankshaft pulley (see page 6-16).
5. Remove the oil cooler joint pipe (A), then remove the seven bolts securing the water pump. Remove
the water pump (B).
6. Inspect, and clean the O-ring groove and mating surface of the water passage.
7. Install the water pump with new O-rings (C) and the oil cooler joint pipe.
8. Clean up any spilled engine coolant.
9. Install the crankshaft pulley (see page 6-17).
10. Install the drive belt auto-tensioner pulley (see page 4-33).
11. Install the drive belt (see page 4-31).
12. Refill the radiator with engine coolant, and bleed the air from the cooling system with the heater
valve open (see step 6 on page 10-8). 1. Check the coolant level in the coolant reservoir.
Make sure it is between the MAX mark (A) and MIN
mark (B).
2. If the coolant level in the coolant reservoir is at or below the MIN mark, add coolant to bring it up to
the MAX mark, then inspect the cooling system for
leaks.
08/08/21 14:39:58 61SNR030_100_0007
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K20Z3 engine
10-710-7
Coolant Check
A B
C
6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft) C A
B
1. Remove the drive belt (see page 4-31).
2. Drain the engine coolant (see page 10-8).
3. Remove the drive belt auto-tensioner pulley (see page 4-33).
4. Remove the crankshaft pulley (see page 6-16).
5. Remove the oil cooler joint pipe (A), then remove the seven bolts securing the water pump. Remove
the water pump (B).
6. Inspect, and clean the O-ring groove and mating surface of the water passage.
7. Install the water pump with new O-rings (C) and the oil cooler joint pipe.
8. Clean up any spilled engine coolant.
9. Install the crankshaft pulley (see page 6-17).
10. Install the drive belt auto-tensioner pulley (see page 4-33).
11. Install the drive belt (see page 4-31).
12. Refill the radiator with engine coolant, and bleed the air from the cooling system with the heater
valve open (see step 6 on page 10-8). 1. Check the coolant level in the coolant reservoir.
Make sure it is between the MAX mark (A) and MIN
mark (B).
2. If the coolant level in the coolant reservoir is at or below the MIN mark, add coolant to bring it up to
the MAX mark, then inspect the cooling system for
leaks.
08/08/21 14:39:58 61SNR030_100_0007
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10-11
Water Passage Replacement
C D
E B A B
A
1. Drain the engine coolant (see page 10-8).
2. Remove the alternator (see page 4-34).
3. Remove the A/C condenser fan shroud assembly.
4. Remove the A/C compressor without disconnecting
the A/C hoses (see step 40 on page 5-7).
5. Remove the intake manifold:
 K20Z2 engine (see page 9-3)
 K20Z3 engine (see page 9-7)
6. Remove the bolt (A) securing the connecting pipe.
7. Disconnect the lower radiator hose (B), the connecting pipe (C), and the water bypass hose (D),
and remove the harness clamp (E). 8. Disconnect the positive crankcase ventilation (PCV)
hose (A), then remove the water passage (B).
9. Remove the thermostat housing.
10. Remove the water pump:  K20Z2 engine (see page 10-6)
 K20Z3 engine (see page 10-7)
(cont’d)
08/08/21 14:40:00 61SNR030_100_0011
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