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Block and Piston Inspection
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•
1. Remove the crankshaft and pistons Isee page
7-12).
2. Check the piston for distortion or cracks.
3. Measure the piston diameter at a point 11 mm 10.4
in.) from the bottom of the skirt. There are two
standard-size pistons INa 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.
Piston Diameter:
Standard INew):
No Letter lor A): 85.980-85.990 mm
13.3850-3.3854 in.)
B:
85.970-85.980 mm
13.3846-3.3850 in.)
Service Limit:
No Letter lor A): 85.930 mm 13.3831 in.!
B:
85.920 mm 13.3827 in.)
11
mm
10.4
in.J
PISTON
DIAMETER
'--~O
Oversize Piston Diameter:
0.25: 86.230-86.240 mm 13.3949 -3.3953 in.)
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.
Cylinder Bore Size
Standard INew):
A or I:
86.010-86.020 mm
13.3862-3.3866 in.)
B or II:
86.000-86.010 mm
13.3858-3.3862 in.)
Service Limit: 86.070 mm 13.3886 in.)
Oversize:
0.25: 86.250-86.260 mm 13.3957-3.3961 in.)
Reboring limit:
0.25 mm 10.01 in.) max.
Bore Taper:
Limit: IDifference between first and third
measurement) 0.05 mm 10.002 in.)
6 mm (O.2 in.)
First
Measurement
Second
Measurement
Third
Measurement
No.4
Iconl'd)
7-15
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