2006 ACURA CSX check engine




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Special Tools Required
6-21
Cam Chain Installation
A
B
C A
B B
D
C A
B A
Camshaft lock pin set 07AAB-RWCA120
NOTE: Keep the cam chain away from magnetic fields.
 Before doing this procedure, 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.
1. Set the crankshaft to top dead center (TDC). Align the TDC mark (A) on the crankshaft sprocket with
the pointer (B) on the engine block.
2. Set the camshafts to TDC. The punch mark (A) on the 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. To hold the intake camshaft, insert a camshaft lock
pin (07AAB-RWCA120) (A) into the maintenance
hole in camshaft position (CMP) pulse plate A (B)
and through No. 5 rocker shaft holder (C).
4. To hold the exhaust camshaft, insert a camshaft lock pin (A) into the maintenance hole in CMP pulse
plate B (D) and through No. 5 rocker shaft holder
(C).
5. Install the cam chain on the crankshaft sprocket with the colored link plate (A) aligned with the mark
(B) on the crankshaft sprocket.
(cont’d)
08/08/21 14:27:16 61SNR030_060_0021
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") Tensioner Rod Length
Service Limit: 13.5 mm (0.53 in.)
6-32
Cylinder Head
Cam Chain Inspection
13.5 mm (0.53 in.)
1. Remove the right 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 on the variable valve timing control
(VTC) actuator and the punch mark on the exhaust
camshaft sprocket should be at the top. Align the
TDC marks on the VTC actuator and the exhaust
camshaft sprocket (see step 5 on page 6-18).
6. Disconnect the crankshaft position (CKP) sensor connector and the VTC oil control solenoid valve
connector, and remove the harness clamps (see
step 6 on page 6-18).
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 (see step 10 on page 6-18).
11. Remove the ground cable, then remove the side engine mount bracket (see step 11 on page 6-19).
12. Remove the side engine mount bracket (see step 12 on page 6-19).
13. Remove the cam chain case (see step 13 on page 6-19). 14. Measure the tensioner rod length between the
tensioner body and bottom of the flat surface
section on the tensioner rod. If the length is more
than the service limit, replace the cam chain and
the oil pump chain.
15. Check the chain case oil seal for damage. If the oil seal is damaged, replace the chain case oil seal
(see page 6-31).
16. Remove all of the old liquid gasket from the chain case mating surfaces, bolt and bolt holes.
17. Clean, and dry the chain case mating surfaces.
18. Apply liquid gasket, P/N 08717-0004, 08718-0001, 08718-0003, or 08718-0009, evenly to the engine
block mating surface of the chain case, and to the
inside edge of the threaded bolt holes. Install the
component within 5 minutes of applying the liquid
gasket(seestep17onpage6-24).
NOTE: If you apply liquid gasket P/N 08718-0012, the component must be installed within 4 minutes.
 If too much time has passed after applying the liquid gasket, remove the old liquid gasket and
residue, then reapply new liquid gasket.
19. Apply liquid gasket to the engine block upper surface contact areas on the chain case and lower
block upper surface contact areas on the chain case
(see step 18 on page 6-24).
08/08/21 14:27:24 61SNR030_060_0032
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6-34 Cylinder Head
CKP Pulse Plate Replacement
1. Remove the right 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 on the variable valve timing control
(VTC) actuator and the punch mark on the exhaust
camshaft sprocket should be at the top. Align the
TDC marks on the VTC actuator and the exhaust
camshaft sprocket (see step 5 on page 6-18).
6. Disconnect the crankshaft position (CKP) sensor connector and the variable valve timing control
(VTC) oil control solenoid valve connector, and
remove the harness clamps (see step 6 on page
6-18).
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 (see step 10 on page 6-18).
11. Remove the ground cable, then remove the side engine mount bracket (see step 11 on page 6-19).
12. Remove the side engine mount bracket (see step 12 on page 6-19).
13. Remove the cam chain case (see step 13 on page 6-19). 14. Remove the CKP pulse plate.
15. Install the CKP pulse plate.
16. Check the chain case oil seal for damage. If the oil
seal is damaged, replace the chain case oil seal
(see page 6-31).
17. Remove all of the old liquid gasket from the chain case mating surfaces, bolt and bolt holes.
18. Clean, and dry the chain case mating surfaces.
19. Apply liquid gasket, P/N 08717-0004, 08718-0001, 08718-0003, or 08718-0009, evenly to the engine
block mating surface of the chain case, and to the
inside edge of the threaded bolt holes. Install the
component within 5 minutes of applying the liquid
gasket(seestep17onpage6-24).
NOTE: If you apply liquid gasket P/N 08718-0012, the component must be installed within 4 minutes.
 If too much time has passed after applying the liquid gasket, remove the old liquid gasket and
residue, then reapply new liquid gasket.
20. Apply liquid gasket to the engine block upper surface contact areas on the chain case and lower
block upper surface contact areas on the chain case
(see step 18 on page 6-24).
08/08/21 14:27:24 61SNR030_060_0034
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DYNOMITE -2009-




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6-37
Cylinder Head Cover Installation
A
B C
B
A
1. Thoroughly clean the head cover gasket and the groove.
2. Install the head cover gasket (A) in the groove of the cylinder head cover (B).
3. Check that the mating surfaces are clean and dry.
4. Apply liquid gasket, P/N 08717-0004, 08718-0001, 08718-0003, or 08718-0009, evenly to the chain
case and the No. 5 rocker shaft holder mating areas.
Install the component within 5 minutes of applying
the liquid gasket.
NOTE: If you apply liquid gasket P/N 08718-0012, the component must be installed within 4 minutes.
 If too much time has passed after applying the liquid gasket, remove the old liquid gasket and
residue, then reapply new liquid gasket. 5. Set the spark plug seals (A) on the spark plug tubes.
Place the cylinder head cover (B) on the cylinder
head, then slide the cover slightly back and forth to
seat the head cover gasket.
6. Inspect the cover washers (C). Replace any washer that is damaged or deteriorated.
7. Tighten the bolts in three steps. In the final step tighten all bolts, in sequence, to 12 N·m (1.2 kgf·m,
8.7 lbf·ft).
NOTE: Wait at least 30 minutes before filling the engine with oil.
 Do not run the engine for at least 3 hours after installing the head cover.
(cont’d)
Apply liquid gasket
to these points.
Apply liquid gasket
to these points.
08/08/21 14:27:26 61SNR030_060_0037
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Cylinder Head Height
Standard (New): 103.95 104.05 mm
(4.093 4.096 in.)
K20Z2 engine
6-436-43
Cylinder Head Inspection for
Warpage Rocker Arm Assembly Removal
PRECISION STRAIGHT EDGE A
A
1. Remove the cylinder head (see page 6-38).
2. Inspect the camshaft:  K20Z2 engine (see page 6-50)
 K20Z3 engine (see page 6-52)
3. Check the cylinder head for warpage. Measure along the edges, and three ways across the center.
 If warpage is less than 0.05 mm (0.002 in.) cylinder head resurfacing is not required.
 If warpage is between 0.05 mm (0.002 in.) and 0.2 mm (0.008 in.), resurface the cylinder head.
 Maximum resurface limit is 0.2 mm (0.008 in.) based on a height of 104 mm (4.09 in.). 1. Remove the cam chain (see page 6-18).
2. Loosen the rocker arm adjusting screws (A).
3. Remove the camshaft holder bolts. To prevent
damaging the camshafts, loosen the bolts, in
sequence, two turns at a time in a crisscross
pattern.
(cont’d)
08/08/21 14:28:12 61SNR030_060_0043
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K20Z2 engine
Rocker Arm-to-Shaft Clearance
Standard (New):
Intake: 0.025 0.052 mm (0.0010 0.0020 in.)
Exhaust: 0.018 0.056 mm (0.0007 0.0022 in.)
Service Limit: 0.08 mm (0.003 in.)
6-48 Cylinder Head
Rocker Arm and Shaft Inspection
A
A
1. Remove the rocker arm assembly (see page 6-43).
2. Disassemble the rocker arm assembly (see page6-46).
3. Measure the diameter of the shaft at the first rocker location.
4. Zero the gauge (A) to the shaft diameter. 5. Measure the inside diameter of the rocker arm, and
check it for an out-of-round condition.
6. Repeat for all rocker arms and both shafts. If the clearance is beyond the service limit, replace the
rocker shaft and all out of service limit rocker arms.
If any VTEC rocker arm needs replacement, replace
the rocker arms (primary and secondary), as a set.
7. Inspect the rocker arm pistons (A). Push on each piston manually. If it does not move smoothly,
replace the rocker arm as a set.
NOTE: Apply new engine oil to the rocker arm
pistons when reassembling.
8. Install the rocker arm assembly (see page 6-60).
08/08/21 14:28:16 61SNR030_060_0048
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K20Z3 engine
Rocker Arm-to-Shaft Clearance
Standard (New): 0.025 0.052 mm (0.0010 0.0020 in.)
Service Limit: 0.08 mm (0.003 in.)
6-49
A
A
1. Remove the rocker arm assembly (see page 6-44).
2. Disassemble the rocker arm assembly (see page6-47).
3. Measure the diameter of the shaft at the first rocker location.
4. Zero the gauge (A) to the shaft diameter. 5. Measure the inside diameter of the rocker arm, and
check it for an out-of-round condition.
6. Repeat for all rocker arms and both shafts. If the clearance is beyond the service limit, replace the
rocker shaft and all out of service limit rocker arms.
If any VTEC rocker arm needs replacement, replace
the rocker arms (primary, mid, and secondary), as a
set.
7. Inspect the rocker arm pistons (A). Push on each piston manually. If it does not move smoothly,
replace the rocker arms as a set.
NOTE: Apply new engine oil to the rocker arm
pistons when reassembling.
8. Install the rocker arm assembly (see page 6-61).
08/08/21 14:28:17 61SNR030_060_0049
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K20Z2 engine
Specified Torque
8x1.25mm
22 N·m (2.2 kgf·m, 16 lbf·ft)
6x1.0mm
12 N·m (1.2 kgf·m, 8.7 lbf·ft)
6 x 1.0 mm Bolts: , , Camshaft End Play
Standard (New): 0.05 0.20 mm
(0.002 0.008 in.)
Service Limit: 0.4 mm (0.02 in.)
6-50 Cylinder Head
Camshaft Inspection
NOTE: Do not rotate the camshaft during inspection.
1. Remove the rocker arm assembly (see page 6-43).
2. Put the rocker shaft holders, the camshaft, and the camshaft holders on the cylinder head, then tighten
the bolts, in sequence, to the specified torque. 3. Seat the camshaft by pushing it away from the
camshaft pulley end of the cylinder head.
4. Zero the dial indicator against the end of the camshaft, then push the camshaft back and forth,
and read the end play. If the end play is beyond the
service limit, replace the cylinder head and recheck.
If it is still beyond the service limit, replace the
camshaft.
08/08/21 14:28:18 61SNR030_060_0050
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