Acura RSX Honda Integra. Manual — part 56
04
05
07
7-14
Engine Block
Crankshaft and Piston Removal (cont’d)
A
B
11. Remove the lower block and bearings. Keep all
bearings in order.
12. Remove the rod caps/bearings. Keep all caps/
bearings in order.
13. Lift the crankshaft out of the engine, being 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. Use the wooden handle of a hammer (A) to drive
out the pistons (B).
16. Reinstall the lower block and bearings on the
engine in the proper order.
17. Reinstall the connecting rod bearings and caps
after removing each piston/connecting rod
assembly.
18. To avoid mix-up on reassembly, mark each piston/
connecting rod assembly with its cylinder number.
NOTE: The existing number on the connecting rod
does not indicate its position in the engine, it
indicates the rod bore size.
01
02
S6M6A00A18316600000MAAT01
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
K20A3 Engine:
Standard (New): 0.03 mm (0.0012 in.) max.
Service Limit:
0.04 mm (0.0016 in.)
K20A2, K20Z1 Engines:
Standard (New): 0.02 mm (0.0008 in.) max.
Service Limit:
0.03 mm (0.0012 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 a suitable brush.
3. Clean the keyway and threads.
4. Measure 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 taper at the edges of each rod and main
journal. The difference between measurements on
each journal must not be more than the service
limit.
6. Place the engine block on the surface plate.
7. Clean and install the bearings on the No. 1 and
No. 5 journal of the engine block.
8. Lower the crankshaft into the block.
9. Measure 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.
01
02
01
S6M6A00A18300024751MAAT00
−
−
−
−
−
−
−
−
−
−
−
−
Piston 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 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
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.)
7-16
Engine Block
Block and Piston Inspection
SKIRT DIAMETER
11 mm
(0.4 in.)
6 mm (0.2 in.)
6 mm (0.2 in.)
First Measurement
Second Measurement
Third Measurement
X
Y
No. 4
No. 1
1. Remove the crankshaft and pistons (see page 7-13).
2. Check the piston for distortion or cracks.
3. Measure the piston 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 block as cylinder bore
sizes.
4. Measure wear and taper in direction X and Y at
three levels in each cylinder as shown. If
measurements in any cylinder are beyond the
oversize bore service limit, replace the block. If the
block is to be rebored, refer to step 7 after reboring.
03
04
02
−
−
Engine Block Warpage
Standard (New): 0.07 mm (0.003 in.) max.
Service Limit:
0.10 mm (0.004 in.)
Piston-to-Cylinder Bore Clearance
Standard (New): 0.020
0.040 mm
(0.0008
0.0016 in.)
Service Limit:
0.05 mm (0.002 in.)
7-17
PRECISION STRAIGHT EDGE
SERVICE LIMIT
0.05 mm (0.002 in.)
5. Scored or scratched cylinder bores must be honed.
6. Check the top of the block for warpage. Measure
along the edges and across the center as shown.
7. Calculate the difference between the cylinder bore
diameter and the piston diameter. If the clearance
is near or exceeds the service limit, inspect the
piston and engine block for excessive wear.
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