2006 ACURA CSX engine


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) Special Tools Required
K20Z3 engine
6-96-9
B A
A
B
12. With the specified air pressure applied, move the
intake primary rocker arm (A) for the No. 1 cylinder.
The primary rocker arm and secondary rocker arm
(B) should move together.
 If the primary and the secondary rocker arm move together, go to step 13.
 If the intake secondary rocker arm do not move together, remove the primary and secondary
rocker arms as an assembly, and check that the
pistons in the primary and secondary rocker
arms move smoothly. If any rocker arm needs
replacing, replace the primary and secondary
rocker arms as an assembly, then retest.
13. Repeat step 12 on the remaining primary rocker arms with each piston at TDC. When all the primary
rocker arms pass the test, go to step 14.
14. Remove the air pressure regulator, the air joint adapter, the VTEC air stopper and VTEC air
adapters.
15. Tighten the camshaft holder mounting bolts to 22 N·m (2.2 kgf·m, 16 lbf·ft).
16. Tighten the sealing bolt to 20 N·m (2.0 kgf·m, 14 lbf·ft).
17. Install the cylinder head cover (see page 6-37).  VTEC air stopper 07ZAJ-PNAA200
 VTEC air adapter 07ZAJ-PNAA101
 Air joint adapter 07ZAJ-PNAA300
 Air pressure regulator 07AAJ-PNAA101
1. Start the engine and let it run for 5 minutes, then turn the ignition switch to LOCK (0).
2. Remove the cylinder head cover (see page 6-36).
3. Set the No. 1 piston at TDC (see step 5 on page 6-18).
4. Move the secondary rocker arm (A) for No. 1 cylinder. The secondary rocker arm should move
independently of the mid rocker arm (B).
 If the secondary rocker arm moves freely, go to step 5.
 If the secondary rocker arm do not move independently, remove the mid, primary, and
secondary rocker arms as an assembly, and
check that the pistons in the rocker arms move
smoothly. If any rocker arm needs replacing,
replace the mid, primary, and secondary rocker
arms as an assembly, then retest.
5. Repeat step 4 on the remaining secondary rocker arms with each piston at TDC. When all the
secondary rocker arms pass the test, go to step 6.
6. Check that the air pressure on the shop air compressor gauge indicates over 400 kPa
(4.0 kgf/cm , 57 psi).
7. Inspect the valve clearance (see page 6-14).
(cont’d)
2
08/08/21 14:26:28 61SNR030_060_0009
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6-11
VTC Actuator Inspection
A B
1. Remove the cam chain (see page 6-18).
2. Loosen the rocker arm adjusting screws: K20Z2 engine (see step 2 on page 6-43)
 K20Z3 engine (see step 2 on page 6-44)
3. Remove the camshaft holder:  K20Z2 engine (see step 3 on page 6-43)
 K20Z3 engine (see step 3 on page 6-44)
4. Remove the intake camshaft.
5. Check that the variable valve timing control (VTC) actuator is locked by turning the VTC actuator
counterclockwise. If not locked, turn the VTC
actuator clockwise until it stops, then recheck it. If it
is still not locked, replace the VTC actuator.
6. Seal the advance holes (A) and the retard holes (B) in the No. 1 camshaft journal with tape.
7. Punch a hole in the tape over one of the advance holes.
8. Apply air to the advance hole to release the lock. 9. Check that the VTC actuator moves smoothly. If the
VTC actuator does not move smoothly, replace the
VTC actuator.
10. Remove the tape and adhesive residue from the No. 1 camshaft journal.
11. Make sure the punch marks on the VTC actuator and the exhaust camshaft sprocket are facing up,
then set the camshafts in the rocker shaft holder:
 K20Z2 engine (see step 6 on page 6-61)
 K20Z3 engine (see step 6 on page 6-62)
12. Set the camshaft holders and cam chain guide B in place:
 K20Z2 engine (see step 7 on page 6-61)
 K20Z3 engine (see step 7 on page 6-62)
13. Tighten the camshaft holder bolts to the specified torque:
 K20Z2 engine (see step 8 on page 6-61)
 K20Z3 engine (see step 8 on page 6-62)
14. Hold the camshaft, and turn the VTC actuator clockwise until you hear it click. Make sure to lock
the VTC actuator by turning it.
15. Install the cam chain (see page 6-21).
16. Adjust the valve clearance:  K20Z2 engine (see page 6-12)
 K20Z3 engine (see page 6-14)
08/08/21 14:26:29 61SNR030_060_0011
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Special Tools Required
Valve Clearance
Intake: 0.21 0.25 mm (0.008 0.010 in.)
Exhaust: 0.28 0.32 mm (0.011 0.013 in.)
K20Z2 engine
6-12Cylinder Head
Valve Clearance Adjustment
A
B
C No. 1
No. 2
No. 3No. 4
No. 1 No. 2 No. 3 No. 4
EXHAUST
INTAKE
AB
 Locknut wrench 07MAA-PR70120
 Adjuster 07MAA-PR70110
NOTE: Connector the Honda Diagnostic System (HDS)
to the data link connector (DLC) (see step 2 on page
11-3), and monitor the engine coolant temperature
(ECT) sensor 1 with the HDS. Adjust the valve clearance
only when the engine coolant temperature is less than
38 °C (100 °F). 1. Remove the cylinder head cover (see page 6-36).
2. Set the No. 1 piston at top dead center (TDC). The punch mark (A) on the variable valve timing control
(VTC) actuator and the punch mark (B) on the
exhaust camshaft sprocket should be at the top.
Align the TDC marks (C) on the VTC actuator and
the exhaust camshaft sprocket. 3. Select the correct feeler gauge for the valve
clearance you are going to check.
4. Insert the feeler gauge (A) between the adjusting screw (B) and the end of the valve stem, then slide
it back and forth, you should feel a slight amount of
drag.
08/08/21 14:26:30 61SNR030_060_0012
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Specified Torque
Intake:
7x0.75mm
20 N·m (2.0 kgf·m, 14 lbf·ft)
Apply new engine oil to the nut threads.
Exhaust:
7x0.75mm
14 N·m (1.4 kgf·m, 10 lbf·ft)
Apply new engine oil to the nut threads.
6-13
07MAA-PR70110
07MAA-PR70120
5. If you feel too much or too little drag, loosen the locknut with the locknut wrench and the adjuster,
andturntheadjustingscrewuntilthedragonthe
feeler gauge is correct.
6. Tighten the locknut to the specified torque, and recheck the clearance. Repeat the adjustment if
necessary. 7. Rotate the crankshaft 180 ° clockwise (camshaft
pulley turns 90 °).
8. Check and, if necessary, adjust the valve clearance on the No. 3 cylinder.
9. Rotate the crankshaft 180 ° clockwise (camshaft pulley turns 90 °).
10. Check and, if necessary, adjust the valve clearance on the No. 4 cylinder.
(cont’d)
08/08/21 14:26:30 61SNR030_060_0013
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Special Tools Required
K20Z3 engine
6-146-14 Cylinder Head
Valve Clearance Adjustment (cont’d)
B
A
C
11. Rotate the crankshaft 180 ° clockwise (camshaft pulley turns 90 °).
12. Check and, if necessary, adjust the valve clearance on the No. 2 cylinder.
13. Install the cylinder head cover (see page 6-37).  Locknut wrench 07MAA-PR70120
 Adjuster 07MAA-PR70110
NOTE: Connect the Honda Diagnostic System (HDS) to
the data link connector (DLC) (see step 2 on page 11-3),
and monitor the engine coolant temperature (ECT)
sensor 1 with the HDS. Adjust the valve clearance only
when the engine coolant temperature is less than 38 °C
(100 °F).
1. Remove the cylinder head cover (see page 6-36).
2. Set the No. 1 piston at top dead center (TDC). The punch mark (A) on the variable valve timing control
(VTC) actuator and the punch mark (B) on the
exhaust camshaft sprocket should be at the top.
Align the TDC marks (C) on the VTC actuator and
the exhaust camshaft sprocket.
08/08/21 14:26:31 61SNR030_060_0014
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µµ
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Valve Clearance
Intake: 0.21 0.25 mm (0.008 0.010 in.)
Exhaust: 0.25 0.29 mm (0.010 0.011 in.)
Specified Torque
7x0.75mm
20 N·m (2.0 kgf·m, 14 lbf·ft)
Apply new engine oil to the nut threads.
6-15
No. 1No. 2 No. 3 No. 4
No. 1 No. 2
No. 3 No. 4
EXHAUST
INTAKE
AB 07MAA-PR70110
07MAA-PR70120
3. Select the correct feeler gauge for the valve clearance you are going to check.
4. Insert the feeler gauge (A) between the adjusting screw (B) and the end of the valve stem, then slide
it back and forth, you should feel a slight amount of
drag. 5. If you feel too much or too little drag, loosen the
locknut with the locknut wrench and the adjuster,
andturntheadjustingscrewuntilthedragonthe
feeler gauge is correct.
6. Tighten the locknut to specified torque, and recheck the clearance. Repeat the adjustment if necessary.
7. Rotate the crankshaft 180 ° clockwise (camshaft pulley turns 90 °).
8. Check and, if necessary, adjust the valve clearance on the No. 3 cylinder.
(cont’d)
08/08/21 14:26:31 61SNR030_060_0015
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Installation
6-17
A
B
D
C : Lubricate with the new engine oil
: Clean
A
07JAB-001020A B
07NAB-001040A
C
07JAA-001020A
(or commercially
available) 90 °
A
B
1. Clean the crankshaft pulley (A), crankshaft (B), bolt(C), and washer (D). Lubricate with new engine oil
as shown.
2. Install the crankshaft pulley, and hold the pulley with the holder handle (A) and holder attachment
(B). 3. Tighten the bolt to 49 N·m (5.0 kgf·m, 36 lbf·ft) with
a torque wrench and the socket, 19 mm (C). Do not
use an impact wrench. If the pulley bolt or
crankshaft are new, tighten the bolt to 177 N·m
(18.0 kgf·m, 130 lbf·ft), then remove the bolt and
tighten it to 49 N·m (5.0 kgf·m, 36 lbf·ft).
4. Mark the bolt head (A) and the crankshaft pulley (B) as shown, then tighten the bolt an additional 90 °
(The mark on the bolt head line up with the mark on
the crankshaft pulley).
5. Install the drive belt (see page 4-31).
6. Install the splash shield (see step 40 on page 5-20).
7. Install the right front wheels.
08/08/21 14:26:33 61SNR030_060_0017
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 M/T model
A/T model
6-18
Cylinder Head
Cam Chain Removal
C
A
B
B
A
C A
A
NOTE: Keep the cam chain away from magnetic fields. 1. Remove the front wheels.
2. Remove the splash shield (see step 25 on page 5-5).
3. Remove the drive belt (see page 4-31).
4. Remove the cylinder head cover (see page 6-36).
5. Set the No. 1 piston at top dead center (TDC). The punch mark (A) on the variable valve timing control
(VTC) actuator and the punch mark (B) on the
exhaust camshaft sprocket should be at the top.
Align the TDC marks (C) on the VTC actuator and
the exhaust camshaft sprocket.
6. Disconnect the crankshaft position (CKP) sensor connector (A) and the VTC oil control solenoid
valve connector (B), and remove the harness
clamps (C). 7. Remove the VTC oil control solenoid valve
(see page 11-294).
8. Remove the crankshaft pulley (see page 6-16).
9. Support the engine with a jack and a wood block under the oil pan.
10. Remove the upper torque rod (A).
08/08/21 14:26:33 61SNR030_060_0018
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DYNOMITE -2009-