2006 ACURA CSX Service Repair Manual

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Page 193 of 2893

ACURA CSX 2006 Service Repair Manual

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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: 0.0

Page 194 of 2893

ACURA CSX 2006 Service Repair Manual

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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 (0.00

Page 195 of 2893

ACURA CSX 2006 Service Repair Manual Î

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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 Bolt

Page 196 of 2893

ACURA CSX 2006 Service Repair Manual

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Camshaft-to-Holder Oil Clearance
Standard (New):
No. 1 Journal: 0.030 0.069 mm
(0.001 0.003 in.)
No. 2, 3, 4, 5 Journals: 0.060 0.099 mm (0.002 0.004 in.)
Service Lim

Page 197 of 2893

ACURA CSX 2006 Service Repair Manual

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K20Z3 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: ,

Page 198 of 2893

ACURA CSX 2006 Service Repair Manual

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Camshaft-to-Holder Oil Clearance
Standard (New):
No. 1 Journal: 0.030 0.069 mm
(0.001 0.003 in.)
No. 2, 3, 4, 5 Journals: 0.060 0.099 mm (0.002 0.004 in.)
Service

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Camshaft-to-Holder Oil Clearance
Standard (New):
No. 1 Journal: 0.030 0.069 mm
(0.001 0.003 in.)
No. 2, 3, 4, 5 Journals: 0.060 0.099 mm (0.002 0.004 in.)
Service Limit: 0.15 mm (0.006 in.) Camshaft Total Runout
Standard (New): 0.03 mm (0.001 in.) max.
Service Limit: 0.04 mm (0.002 in.)
Cam Lobe Height Standard (New):
6-53
INTAKE
EXHAUST
PRI MID SEC SEC
MID PRI
C/C C/C
5. Loosen the camshaft holder bolts two turns at a
time, in a crisscross pattern. Then remove the
camshaft holders from the cylinder head.
6. Lift the camshafts out of the cylinder head, wipe them clean, then inspect the lift ramps. Replace the
camshaft if any lobes are pitted, scored, or
excessively worn.
7. Clean the camshaft journal surfaces in the cylinder head, then set the camshafts back in place. Place a
plastigage strip across each journal.
8. Install the camshaft holders, then tighten the bolts to the specified torque as shown in step 2.
9. Remove the camshaft holders. Measure the widest portion of plastigage on each journal.
If the camshaft-to-holder clearance is within the service limits, go to step 11.
If the camshaft-to-holder clearance is beyond the service limit and the camshaft has been replaced,
replace the cylinder head.
If the camshaft-to-holder clearance is beyond the service limit and the camshaft has not been
replaced, go to step 10. 10. Check the total runout with the camshaft supported
on V-blocks.
If the total runout of the camshaft is within the service limit, replace the cylinder head.
If the total runout is beyond the service limit, replace the camshaft and recheck the camshaft-
to-holder oil clearance. If the oil clearance is still
beyond the service limit, replace the cylinder
head.
11. Measure the cam lobe height. INTAKE EXHAUST
PRI 32.791 mm (1.2910 in.) 32.772 mm
(1.2902 in.)
MID 35.534 mm (1.3990 in.) 34.768 mm
(1.3688 in.)
SEC 32.678 mm (1.2865 in.) 32.661 mm
(1.2859 in.)
PRI: Primary MID: Mid SEC: Secondary
C/C: Cam Chain
08/08/21 14:28:19 61SNR030_060_0053
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Page 199 of 2893

ACURA CSX 2006 Service Repair Manual
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Special Tools Required
6-54
Cylinder Head
Valve, Spring, and Valve Seal Removal
B
A
07757-PJ1010A A
Valve spring compressor att

Page 200 of 2893

ACURA CSX 2006 Service Repair Manual
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K20Z2 engine
Intake Valve Dimensions
A Standard (New): 34.85 35.15 mm
(1.372 1.384 in.)
B Standard (New): 108.7 109.5 mm (4.280 4.311 in.)
C Standard (New): 5.475 5.485 mm (0.2156 0.2159 in.)
C Service Limit: 5.445 mm (0.214 in.)
Exhaust Valve Dimensions
A Standard (New): 29.85 30.15 mm (1.175 1.187 in.)
B Standard (New): 108.3 109.1 mm (4.264 4.295 in.)
C Standard (New): 5.450 5.460 mm (0.2146 0.2150 in.)
C Service Limit: 5.420 mm (0.213 in.)
K20Z3 engine
Intake Valve Dimensions
A Standard (New): 34.85 35.15 mm (1.372 1.384 in.)
B Standard (New): 108.5 109.1 mm (4.272 4.295 in.)
C Standard (New): 5.475 5.485 mm (0.2156 0.2159 in.)
C Service Limit: 5.445 mm (0.214 in.)
Exhaust Valve Dimensions
A Standard (New): 29.85 30.15 mm (1.175 1.187 in.)
B Standard (New): 108.4 109.0 mm (4.268 4.291 in.)
C Standard (New): 5.450 5.460 mm (0.2146 0.2150 in.)
C Service Limit: 5.420 mm (0.213 in.) Intake Valve Stem-to-Guide Clearance
Standard (New): 0.06 0.11 mm
(0.002 0.004 in.)
Service Limit: 0.16 mm (0.006 in.)
Exhaust Valve Stem-to-Guide Clearance
Standard (New): 0.11 0.16 mm (0.004 0.006 in.)
Service Limit: 0.22 mm (0.009 in.)
Intake Valve Stem-to-Guide Clearance
Standard (New): 0.030 0.055 mm (0.0012 0.0022 in.)
Service Limit: 0.08 mm (0.003 in.)
Exhaust Valve Stem-to-Guide Clearance
Standard (New): 0.055 0.080 mm (0.0022 0.0031 in.)
Service Limit: 0.11 mm (0.004 in.)
6-556-55
Valve Inspection Valve Stem-to-Guide Clearance
Inspection
C
B
A
1. Remove the valves (see page 6-54).
2. Measure the valve in these areas. 1. Remove the valves (see page 6-54). 2. Slide the valve out of its guide about 10 mm(0.39 in.), then measure the stem-to-guide
clearance with a dial indicator while rocking the
stem in the direction of normal thrust (wobble
method). If the measurement exceeds the service limit, recheck it using a new valve.
If the measurement is now within the service limit, reassemble using a new valve.
If the measurement with a new valve still exceeds the service limit, go to step 3.
3. Subtract the O.D. of the valve stem, measured with a micrometer, from the I.D. of the valve guide,
measured with an inside micrometer or ball gauge.
Take the measurements in three places along the
valve stem and three places inside the valve guide.
The difference between the largest guide
measurement and the smallest stem measurement
should not exceed the service limit.
08/08/21 14:28:20 61SNR030_060_0055
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