check engine ACURA CSX 2006 Service Service 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: , , Camshaft End Play
Standard (New): 0.05 0.20 mm (0.002 0.008 in.)
Service Limit: 0.4 mm (0.02 in.)
6-52Cylinder Head
Camshaft Inspection (cont’d)
NOTE: Do not rotate the camshaft during inspection.
1. Remove the rocker arm assembly (see page 6-44).
2. Put the rocker shaft holders, camshaft, and camshaft holders on the cylinder head, then tighten
the bolts in sequence to the specified torque.
NOTE: If the engine does not have bolt , skip it
and continue the torque sequence. 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 14:28:19 61SNR030_060_0052
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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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Valve Guide Installed Height
Intake: 15.2 16.2 mm (0.598 0.638 in.)
Exhaust: 15.5 16.5 mm (0.610 0.650 in.)
6-57
B
A
07742-0010100
07HAH-PJ70100
9. Apply a thin coat of new engine oil to the outside of
the new valve guide. Install the guide from the
camshaft side of the head, use the valve guide
driver to drive the guide in to the specified installed
height (A) of the guide (B). If you have all 16 guides
to do, you may have to reheat the head. 10. Coat both valve guide reamer, 5.5 mm and the
valve guide with cutting oil.
11. Rotate the reamer clockwise to the full length of the valve guide bore.
12. Continue to rotate the reamer clockwise while removing it from the bore.
13. Thoroughly wash the guide in detergent and water to remove any cutting residue.
14. Check the clearances with a valve (see page 6-55). Verify that a valve slides into the intake and
exhaust valve guides without sticking.
15. Inspect the valve seating, if necessary renew the valve seat using a valve seat cutter (see page 6-58).
08/08/21 14:28:22 61SNR030_060_0057
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Intake Valve Stem Installed Height
Standard (New): 44.0 44.5 mm (1.73 1.75 in.)
Service Limit: 44.7 mm (1.76 in.)
Exhaust Valve Stem Installed Height
Standard (New): 44.1 44.6 mm (1.74 1.76 in.)
Service Limit: 44.8 mm (1.76 in.) Special Tools Required
6-596-59
Valve, Spring, and Valve Seal
Installation
A
AB
07PAD-0010000
F
D
EC
8. Insert the intake and exhaust valves in the head, and measure the valve stem installed height (A).
9. If the valve stem installed height is beyond the service limit, replace the valve and recheck. If it is
still beyond the service limit, replace the cylinder
head, the valve seat in the head is too deep.  Stem seal driver 07PAD-0010000
 Valve spring compressor attachment 07757-PJ1010A
1. Coat the valve stems with new engine oil. Install the valves in the valve guides.
2. Check that the valves move up and down smoothly.
3. Install the spring seats on the cylinder head.
4. Install the new valve seals (A) using the 5.5 mm side of the stem seal driver (B).
NOTE: The exhaust valve seal (C) has a black spring
(D), and the intake valve seal (E) has a white spring
(F). They are not interchangeable.
(cont’d)
08/08/21 14:28:23 61SNR030_060_0059
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Intake Valve Stem Installed Height
Standard (New): 44.0 44.5 mm (1.73 1.75 in.)
Service Limit: 44.7 mm (1.76 in.)
Exhaust Valve Stem Installed Height
Standard (New): 44.1 44.6 mm (1.74 1.76 in.)
Service Limit: 44.8 mm (1.76 in.) Special Tools Required
6-596-59
Valve, Spring, and Valve Seal
Installation
A
AB
07PAD-0010000
F
D
EC
8. Insert the intake and exhaust valves in the head, and measure the valve stem installed height (A).
9. If the valve stem installed height is beyond the service limit, replace the valve and recheck. If it is
still beyond the service limit, replace the cylinder
head, the valve seat in the head is too deep.  Stem seal driver 07PAD-0010000
 Valve spring compressor attachment 07757-PJ1010A
1. Coat the valve stems with new engine oil. Install the valves in the valve guides.
2. Check that the valves move up and down smoothly.
3. Install the spring seats on the cylinder head.
4. Install the new valve seals (A) using the 5.5 mm side of the stem seal driver (B).
NOTE: The exhaust valve seal (C) has a black spring
(D), and the intake valve seal (E) has a white spring
(F). They are not interchangeable.
(cont’d)
08/08/21 14:28:23 61SNR030_060_0059
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6-65
A
B6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft)
B
A A
B
19. Connect the positive crankcase ventilation (PCV)hose (A) (K20Z2 engine) and install the ground
cable (B).
20. Connect the fuel feed hose (A) (see page 11-331), then install the quick-connect fitting cover (B). 21. Connect the evaporative emission (EVAP) canister
hose (A) and the brake booster vacuum hose (B).
22. Install the exhaust manifold (see page 9-11).
23. Install the intake manifold:  K20Z2 engine (see page 9-4)
 K20Z3 engine (see page 9-9)
24. Install the drive belt (see page 4-31).
25. Install the air cleaner assembly (see page 11-345).
26. After installation, check that all tubes, hoses and connectors are installed correctly.
27. Inspect for fuel leaks. Turn the ignition switch to ON (II) (do not operate the starter) so that the fuel
pump runs for about 2 seconds and pressurizes the
fuel line. Repeat this operation three times, then
check for fuel leakage at any point in the fuel line.
(cont’d)
08/08/21 14:28:44 61SNR030_060_0065
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Main Bearing Clearance Inspection
Main Bearing-to-Journal Oil Clearance
No.1,2,4,5Journals:
Standard (New): 0.017 0.041 mm (0.0007 0.0016 in.)
Service Limit: 0.050 mm (0.0020 in.)
No. 3 Journal:
Standard (New): 0.025 0.049 mm (0.0010 0.0019 in.)
Service Limit: 0.055 mm (0.0022 in.)
7-6 Engine Block
Crankshaft Main Bearing Replacement
1. To check the main bearing-to-journal oil clearance,
remove the lower block and the bearing halves
(see page 7-13).
2. Clean each main journal and bearing half with a clean shop towel.
3. Place one strip of plastigage across each main journal.
4. Reinstall the bearings and lower block, then tighten the bolts to 29 N·m (3.0 kgf·m, 22 lbf·ft) 56 ° in
thepropersequence(seestep19onpage7-27).
NOTE: Apply new engine oil to the bolt threads and flanges.
 Do not rotate the crankshaft during inspection.
5. Remove the lower block and the bearings again, and measure the widest part of the plastigage. 6. If the plastigage measures too wide or too narrow,
remove the crankshaft, and remove the upper half
of the bearing. Install a new, complete bearing with
the appropriate color code(s), and recheck the
clearance. Do not file, shim, or scrape the bearings
or the caps to adjust clearance.
7. If the plastigage shows the clearance is still incorrect, try the next larger or smaller bearing (the
color listed above or below the current one), and
check again. If the proper clearance cannot be
obtained by using the appropriate larger or smaller
bearings, replace the crankshaft, and start over.
08/08/21 14:32:32 61SNR030_070_0006
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Connecting Rod Bearing Selection
Connecting Rod Big End Bore Code LocationsNormal Bore Size
K20Z2 engine: 48.0 mm (1.89 in.)
K20Z3 engine: 51.0 mm (2.01 in.)
7-9
8. If the plastigage measures too wide or too narrow,remove the upper half of the bearing, install a new,
complete bearing with the appropriate color
code(s), and recheck the clearance. Do not file,
shim, or scrape the bearings or the caps to adjust
clearance.
9. If the plastigage shows the clearance is still incorrect, try the next larger or smaller bearing (the
color listed above or below the current one), and
check clearance again. If the proper clearance
cannot be obtained by using the appropriate larger
or smaller bearing, replace the crankshaft, and start
over. 1. Inspect each connecting rod for cracks and heat
damage.
2. Each rod has a tolerance range from 0 to 0.024 mm (0.0009 in.), in 0.006 mm (0.0002 in.) increments,
depending on the size of its big end bore. It is then
stamped with a number or bar (1, 2, 3, or 4/l, ll, lll,
or llll) indicating the range. You may find any
combination of numbers and bars in any engine.
(Half the number or bar is stamped on the bearing
cap, the other half is on the rod.)
If you cannot read the code because of an
accumulation of oil and varnish, do not scrub it
with a wire brush or scraper. Clean it only with
solvent or detergent.
(cont’d)
08/08/21 14:32:33 61SNR030_070_0009
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Out-of-Round and Taper
Journal Out-of-Round
Standard (New): 0.005 mm (0.0002 in.) max.
Service Limit: 0.010 mm (0.0004 in.)
Journal Taper
Standard (New): 0.005 mm (0.0002 in.) max.
Service Limit: 0.010 mm (0.0004 in.) Straightness
Crankshaft Total Runout
Standard (New): 0.03 mm (0.0012 in.) max.
Service Limit: 0.04 mm (0.0016 in.)
7-15
Crankshaft Inspection
1. Remove the crankshaft from the engine block(see page 7-13).
2. Clean the crankshaft oil passages with pipe cleaners or suitable brush.
3. Clean the keyway and the threads, and check for damage.
4. Measure the out-of-round at the middle of each rod and main journal in two places. The difference
between measurements on each journal must not
be more than the service limit.
5. Measure the taper at the edges of each rod and the main journal. The difference between
measurement on each journal must not be more
than the service limit. 6. Place the V-blocks on a flat surface.
7. Check the total runout with the crankshaft
supported on V-blo cks.
8. Measure the runout on all main journals. Rotate the crankshaft two complete revolutions. The
difference between measurements on each journal
must not be more than the service limit.
08/08/21 14:32:37 61SNR030_070_0015
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Piston Skirt Diameter
Standard (New):
No Letter (or A): 85.980 85.990 mm
(3.3850 3.3854 in.)
B: 85.970 85.980 mm (3.3846 3.3850 in.)
Service Limit:
No Letter (or A): 85.930 mm (3.3831 in.)
B: 85.920 mm (3.3827 in.)
Oversize Piston Skirt Diameter
0.25: 86.230 86.240 mm (3.3949 3.3953 in.) Cylinder Bore Size
Standard (New):
A or I: 86.010 86.020 mm
(3.3862 3.3866 in.)
B or II: 86.000 86.010 mm (3.3858 3.3862 in.)
Service Limit: 86.070 mm (3.3886 in.)
Oversize Bore
0.25: 86.250 86.260 mm (3.3957 3.3961 in.)
Reboring Limit: 0.25 mm (0.01 in.) max.
Bore Taper
Limit: (Difference between first and third measurement) 0.05 mm (0.002 in.)
7-16Engine Block
Block and Piston Inspection
PISTON SKIRT DIAMETER
11 mm
(0.4 in.) 6mm(0.2in.)
6mm(0.2in.)
X
Y No. 4
No. 1
First Measurement
Second Measurement
Third Measurement
1. Remove the crankshaft and the pistons (see page
7-13).
2. Check the piston for distortion or cracks.
3. Measure the piston skirt diameter at a point 11 mm (0.4 in.) from the bottom of the skirt. There are two
standard-size pistons (No Letter or A, and B). The
letter is stamped on the top of the piston. Letters
are also stamped on the engine block as the
cylinder bore sizes. 4. Measure the wear and taper in direction X and Y at
three levels inside each cylinder as shown. If the
measurements in any cylinder are beyond the
Oversize Bore Service Limit, replace the engine
block. If the engine block is being rebored, refer to
step 7 after reboring.
08/08/21 14:32:37 61SNR030_070_0016
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