SECTION 10 - ENGINE
10-43
Oversized Piston
When the cylinder is oversized, be sure that an
oversized piston is used.
Standard Clearance: 0.0015″ - 0.0028″ (0.038
mm - 0.072 mm)
Allowable Limit: 0.010″ max. (0.25 mm)
Standard Diameter (Piston): 3.3050″ - 3.3056″
(83.948 mm - 83.963 mm)
Allowable Limit: 3.2953″ min. (83.7 mm)
Large Diameter of Piston Skirt:
Standard: 3.3050″ - 3.3056″ (83.948 - 83.963
mm)
0.0197″ (0.5 mm) Oversize: 3.3247″ - 3.3253″
(84.448 - 84.463 mm)
0.039″ (1.0 mm) Oversize: 3.3444″ - 3.3450″
(84.948 - 84.963 mm)
Clearance between wrist pin hole and wrist pin.
Check the inside diameter of the wrist pin hole and
the outside diameter of the wrist pin, and calculate
the clearance between them.
If the clearance is more than the allowable limit,
replace.
Standard Clearance: -0.000039″ to + 0.00028″
(-0.001 mm to + 0.007 mm)
Allowable Limit: 0.0008″ (0.02 mm)
Piston Ring
If the piston ring is worn or damaged, replace it.
Piston Ring Gap
Insert the rings into the cylinder at a right angle to the
cylinder bore and measure the gaps with a thickness
gauge. If the gap is more than the allowable limit,
replace.
#1 Ring
Standard Gap: 0.008″ - 0.014″ (0.20 mm - 0.35
mm)
Allowable Limit: 0.039″ (1.0 mm)
#2 Ring
Standard Gap: 0.008″ - 0.016″ (0.20 mm - 0.40
mm)
Allowable Limit: 0.039″ (1.0 mm)
60
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