Acura CSX. Instruction — page 73

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K20Z3 engine

9-14

Intake Manifold and Exhaust System

8 x 1.25 mm
22 N·m
(2.2 kgf·m, 16 lbf·ft)

6 x 1.0 mm
10 N·m
(1.0 kgf·m, 7.2 lbf·ft)

8 x 1.25 mm
22 N·m (2.2 kgf·m, 16 lbf·ft)

HEAT SHIELD

GASKET

MUFFLER

EXHAUST PIPE B

SELF-LOCKING NUTS
10 x 1.25 mm
33 N·m
(3.4 kgf·m, 25 lbf·ft)

GASKET

THREE WAY CATALYTIC CONVERTER
(TWC) ASSEMBLY

SECONDARY HEATED
OXYGEN SENSOR
(SECONDARY HO2S)
44 N·m (4.5 kgf·m, 33 lbf·ft)

AIR FUEL RATIO (A/F) SENSOR
44 N·m (4.5 kgf·m, 33 lbf·ft)

GASKET

6 x 1.0 mm
10 N·m
(1.0 kgf·m, 7.2 lbf·ft)

NOTE: Use new gaskets and self-locking nuts when reassembling.

Tighten the bolts in steps,
alternating side-to-side.

Tighten the bolts in steps,
alternating side-to-side.

Replace.

Replace.

Replace.

Replace.

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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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K20Z2 engine

10-2

Cooling 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 10-19

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 10-11

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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