2006 ACURA CSX lock

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7-4Engine Block
Component Location Index (cont’d)
PISTON RINGS
PISTON PIN
CONNECTING ROD
CONNECTING ROD
BEARINGS CONNECTING ROD
BEARING CAP
PISTON
ENGINE BLOCK
CONNECTING ROD BOLTS DOWEL PINSReplacement, page 7-21
Removal, page 7-18
Inspection, page 7-19
Installation, page 7-20
End Play Inspection, page 7-5
Small End Measurement, page 7-19
Oil Clearance Inspection,page 7-8
Selection, page 7-9
Removal, page 7-13
Measurement, page 7-16
Installation, page 7-23
RidgeRemoval,step15onpage7-14
Cylinder Bore Inspection, page 7-16
Warpage Inspection, page 7-16
Cylinder Bore Honing, page 7-18
Inspection, page 7-25
08/08/21 14:32:31 61SNR030_070_0004
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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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Main Bearing Selection
Crankshaft Bore Code Location
Main Journal Code Location
7-7
No. 1 JOURNAL
(PULLEY END)
No. 5 JOURNAL
(TRANSMISSION END)
No. 1 JOURNAL No. 5 JOURNAL
1. Numbers, letters or bars have been stamped on theend of the engine block as a code for the size of
each of the five main journal bores. Write down the
crank bore codes.
If you cannot read the codes because of
accumulated dirt and dust, do not scrub them with
a wire brush or scraper. Clean them only with
solvent or detergent. 2. The main journal codes are stamped on the
crankshaft in either location.
(cont’d)
08/08/21 14:32:32 61SNR030_070_0007
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Connecting Rod Bearing Clearance
Inspection
Connecting Rod Bearing-to-Journal Oil Clearance
K20Z2 engine
Standard (New): 0.020 0.050 mm (0.0008 0.0020 in.)
Service Limit: 0.060 mm (0.0024 in.)
K20Z3 engine
Standard (New): 0.032 0.066 mm (0.0013 0.0026 in.)
Service Limit: 0.077 mm (0.0030 in.)
7-87-8 Engine Block
Crankshaft Main Bearing
Replacement (cont’d)
Connecting Rod Bearing
Replacement
Larger crank bore
1or
AorI 2or
BorII 3or
C or III4or
D or IIII
Smaller bearing (Thicker)
Blue
Pink
Yellow Green
Green/
Brown
Brown Green
Green/
Brown
Brown Green
Green/
Brown
Brown Green
Green/
Brown
Brown
Black Black/
Blue
Crank
bore
code
Pink/
YellowYellow
Yellow
Pink/
Yellow
Black
Black Black/
Blue
Main
journal
code
1
2
3
4
5
6
Smaller
main
journal Smaller
bearing
(Thicker)
3. Use the crank bore codes and crank journal codes
to select the appropriate replacement bearings
from the following table.
NOTE: Color code is on the edge of the bearing.
 When using bearing halves of different colors, it does not matter which color is used in the top or
bottom. 1. Remove the oil pump (see page 8-16).
2. Remove the baffle plates (see step 8 on page 7-13).
3. Remove the connecting rod cap and the bearing
half.
4. Clean the crankshaft rod journal and the bearing half with a clean shop towel.
5. Place plastigage across the rod journal.
6. Reinstall the bearing half and connecting rod cap, and tighten the bolts to 20 N·m (2.0 kgf·m, 14 lbf·ft)90 ° (K20Z2 engine) or 29 N·m (3.0 kgf·m,
22 lbf·ft) 90 ° (K20Z3 engine).
NOTE:  Apply new engine oil to the bolt threads and flanges.
 Do not rotate the crankshaft during inspection.
7. Remove the connecting rod cap and the bearing half, and measure the widest part of the plastigage.
08/08/21 14:32:33 61SNR030_070_0008
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Connecting Rod Journal Code Location
7-10 Engine Block
Connecting Rod Bearing Replacement (cont’d)
No. 1 JOURNAL
No. 4 JOURNAL Larger big end bore
Smaller bearing (Thicker)
1orI 2orII
3orIII 4orIIII
Big end
bore
code
Smaller
rod
journal Smaller
bearing
(Thicker)
Rod
journal
code
Green/
BrownBlack
Yellow/
Green
Brown
Pink/
Yellow
Green
Brown Blue
Yellow Pink
Green Brown/
Black Brown/
Black
Green/
Brown
Yellow/
Green
Black/
Blue
A
B
C
D
3. The connecting rod journal codes are stamped on the crankshaft in either location. 4. Use the big end bore codes and rod journal codes
to select the appropriate replacement bearings
from the following table.
NOTE: Color code is on the edge of the bearing.
 When using bearing halves of different colors, it does not matter which color is used in the top or
bottom.
08/08/21 14:32:34 61SNR030_070_0010
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7-12Engine Block
Oil Pan Removal (cont’d)
B
A
19. A/T model: Remove the shift cable cover.
20. K20Z2 engine: Remove the torque converter cover/clutch cover. 21. K20Z3 engine: Remove the clutch cover (A) and the
transmission mounting bolts (B).
22. Remove the bolts securing the oil pan.
23. Using a flat blade screwdriver, separate the oil pan from the lower block in the places shown.
24. Remove the oil pan.
08/08/21 14:32:35 61SNR030_070_0012
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7-14Engine Block
Crankshaft and Piston Removal (cont’d)
A
A
B
11. Remove the lower block and the bearings. Keep all the bearings in order.
12. Remove the connecting rod caps/bearing halves. Keep all connecting rod caps/bearing halves in
order.
13. Lift the crankshaft out of the engine. Be careful not to damage the journals.
14. Remove the upper bearing halves from the connecting rods, and set them aside with their
respective caps. 15. If you can feel a ridge of metal or hard carbon
around the top of each cylinder, remove it with a
ridge reamer (A). Follow the reamer manufacturer’s
instructions. If the ridge is not removed, it may
damage the pistons as they are pushed out.
16. Use the wooden handle of a hammer (A) to drive out the piston/connecting rod assembly (B).
17. Reinstall the lower block and the bearings on the engine in the proper order.
18. Reinstall the connecting rod bearings and the caps after removing each piston/connecting rod
assembly.
19. Mark each piston/connecting rod assembly with its cylinder number to make sure they are reused in
the original order.
NOTE: The existing number on the connecting rod
does not indicate its position in the engine, it
indicates the rod bore size.
08/08/21 14:32:36 61SNR030_070_0014
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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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