2006 ACURA CSX check engine


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")Compression Pressure:
Above 930 kPa (9.5 kgf/cm , 135 psi)
Maximum Variation:
Within 200 kPa (2.0 kgf/cm , 28 psi)
2
2
6-7
Engine Compression Inspection
NOTE: After this inspection, you must reset the engine
control module (ECM)/powertrain control module
(PCM), otherwise the ECM/PCM will continue to stop
the fuel injectors from operating. 1. Warm up the engine to normal operating temperature (cooling fan comes on).
2. Turn the ignition switch to LOCK (0).
3. Connect the Honda Diagnostic System (HDS) to the data link connector (DLC) (see step 2 on page 11-3).
4. Turn the ignition switch to ON (II).
5. Make sure the HDS communicates with the vehicle and the ECM/PCM. If it does not communicate,
troubleshoot the DLC circuit (see page 11- 204).
6. Select ALL INJECTORS STOP in the PGM-FI, INSPECTION menu with the HDS.
7. Turn the ignition switch to LOCK (0).
8. Remove the four ignition coils (see page 4-21).
9. Remove the four spark plugs.
10. Attach the compression gauge to a spark plug hole. 11. Step on the accelerator pedal to open the throttle
fully, then crank the engine with the starter motor,
and measure the compression.
12. Measure the compression on the remaining cylinders.
13. If the compression is not within specifications, check the following items, then remeasure the
compression.
 Incorrect valve clearance
 Confirmation of cam timing
 Damaged or worn cam lobes
 Damaged or worn valves and seats
 Damaged cylinder head gasket
 Damaged or worn piston rings
 Damaged or worn piston and cylinder bore
14. Remove the compression gauge from the spark plug hole.
15. Install the four spark plugs.
16. Install the four ignition coils (see page 4-21).
17. Select the ECM/PCM reset (see page 11-4) in the PGM-FI INSPECTION menu to cancel ALL
INJECTORS STOP with the HDS.
08/08/21 14:26:27 61SNR030_060_0007
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Special Tools Required
Specified Air Pressure:
290 kPa (3.0 kgf/cm , 42 psi)
K20Z2 engine
2
6-8Cylinder Head
VTEC Rocker Arm Test
B
A D
07ZAJ-PNAA300
A
B
07ZAJ-PNAA200 C
07ZAJ-PNAA101
E
07AAJ-PNAA101
 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 top dead center (TDC) (see step 5 on page 6-18).
4. Move the intake primary rocker arm (A) for the No. 1 cylinder. The primary rocker arm should
move independently of the intake secondary rocker
arm (B).
 If the intake primary rocker arm moves freely, go to step 5.
 If the intake primary rocker arm do not move independently, remove the primary and
secondary rocker arms as an assembly and check
that the pistons in the secondary and primary
rocker arms move smoothly. If any rocker arm
needs replacing, replace the primary and
secondary rocker arms as an assembly, then
retest. 5. Repeat step 4 on the remaining intake primary
rockerarmswitheachpistonatTDC.Whenallthe
primary 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 kgf/cm , 57 psi).
7. Inspect the valve clearance (see page 6-12).
8. Remove the sealing bolt (A) from the relief hole, and install the VTEC air stopper (B).
9. Remove the No. 2 and No. 3 camshaft holder bolts, and install the VTEC air adapters (C) finger-tight.
10. Connect the air joint adapter (D) and the air pressure regulator (E).
11. Loosen the valve on the air pressure regulator, and apply the specified air pressure.
NOTE: If the rocker arm piston does not move after
applying air pressure, move the primary or
secondary rocker arm up and down manually by
rotating the crankshaft clockwise.
2
08/08/21 14:26:27 61SNR030_060_0008
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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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DYNOMITE -2009-




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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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DYNOMITE -2009-