Piston, Engine
PISTON TO PISTON PIN OIL CLEARANCEPiston Pin Hole Diameter
Measure the inner diameter of piston pin hole with an inside micrometer (A).
Standard: 19.993 - 19.999 mm (0.7871 - 0.7874 in)
Piston Pin Outer Diameter
Measure the outer diameter of piston pin with a micrometer (A).
Standard: 19.989 - 19.995 mm (0.7870 - 0.7872 in)
Piston to Piston Pin Oil Clearance
(Piston to piston pin oil clearance) = (Piston pin hole diameter) - (Piston pin outer diameter)
Standard: 0.002 - 0.006 mm (0.0001 - 0.0002 in)
^ If oil clearance is out of the standard, replace piston and piston pin assembly.
^ When replacing piston and piston pin assembly, refer to "Piston to Cylinder Bore Clearance".
NOTE:
^ Piston is available together with piston pin as assembly.
^ Piston pin (piston pin hole) grade is provided only for the parts installed at the plant. For service parts, no grades can be selected. (Only grade "0" is available.)
PISTON TO CYLINDER BORE CLEARANCE
Cylinder Bore Inner Diameter
^ Using a bore gauge (A), measure the cylinder bore for wear, out-of-round and taper at six different points on each cylinder. ("X" and "Y" directions at "A", "B" and "C") ("Y" is in longitudinal direction of engine)
NOTE: When determining cylinder bore grade, measure the cylinder bore "X" direction at "B" position.
Standard inner diameter: 84.000 - 84.020 mm (3.3071 - 3.3079 in)
Out-of-round (Difference between "X" and "Y"): 0.015 mm (0.0006 in)
Taper limit (Difference between "A" and "C"): 0.01 mm (0.0004 in)
^ If the measured value exceeds the limit, or if there are scratches and/or seizure on the cylinder inner wall, replace cylinder block.
NOTE: Oversize piston is not provided.
Piston Skirt Diameter
Measure the outer diameter of piston skirt with a micrometer (A).
Measure point: Distance from the top 39.9 mm (1.571 in)
Standard: 83.970 - 83.990 mm (3.3059 - 3.3067 in)
Piston to Cylinder Bore Clearance
Calculate by piston skirt diameter and cylinder bore inner diameter (direction "X", position "B"). (Clearance) = (Cylinder bore inner diameter) - (Piston skirt diameter)
Standard: 0.020 - 0.040 mm (0.0008 - 0.0016 in)
Limit: 0.08 mm (0.0031 in)
^ If it exceeds the limit, replace piston and piston pin assembly and/or cylinder block.
PISTON, PISTON RING AND PISTON PIN
Available Piston
Piston Ring
Piston Pin