155
POWERHEAD
CRANKSHAFT, PISTONS AND CAMSHAFT
7
Check that the piston pin and the piston pin hole
are free from excessive wear and damage.
Apply engine oil on piston pin so that piston pin
can move smoothly in the piston pin hole.
To check piston pin to piston pin hole clearance,
measure the following:
•
Piston pin outside diameter in the thrust and
axial directions.
•
Piston pin hole diameter in the thrust and axial
directions.
Piston pin outside diameter:
•
Standard: 0.7085 to 0.7087 in. (17.995 to
18.000 mm)
•
Service limit: 0.7079 in. (17.980 mm)
Piston pin hole diameter:
•
Standard: 0.7089 to 0.7092 in. (18.006 to
18.014 mm)
•
Service limit: 0.7098 in. (18.030 mm)
Piston pin to piston pin hole clearance:
•
Standard: 0.0002 to 0.0007 in. (0.006 to 0.019
mm)
•
Service limit: 0.0016 in. (0.040 mm)
If measurement exceeds service limit, replace the
piston pin and/or piston.
Connecting Rods
Measure the connecting rod small end inside
diameter. If measurement exceeds service limit,
replace the connecting rod.
•
Standard: 0.7089 to 0.7092 in. (18.006 to
18.014 mm)
•
Service limit: 0.7098 in. (18.030 mm)
Piston pin to connecting rod hole clearance:
•
Standard: 0.0002 to 0.0007 in. (0.006 to 0.019
mm)
•
Service limit: 0.0028 in. (0.07 mm)
004577
004578
004579
