Workshop Manual

4–18 ENGINE ASSEMBLY II
Piston Ring Gap
1. Insert the piston ring horizontally (in the position it
would assume if it were installed to the piston) into
the cylinder liner.
2. Use an inverted piston to push the piston ring into
the cylinder liner until it reaches either measuring
point 1 or measuring point 2. Cylinder liner diam-
eter is the smallest at these two points.
Do not allow the piston ring to slant to one side or
the other. It must be perfectly horizontal.
Cylinder Liner Measuring Point 1: 10mm (0.39 in)
Cylinder Liner Measuring Point 2: 130mm (5.12 in)
3. Use a feeler gauge to measure the piston ring gap.
If the measured value exceeds the specified limit,
the piston ring must be replaced.
Piston Ring Gap
mm (in)
1
2
Standard Limit
1st Compression 0.35–0.50
Ring (0.014–0.020)
2nd Compression 0.60–0.75
Ring (0.0236–0.0295)
1.5
3rd Compression 0.60–0.75
(0.059)
Ring (0.0236–0.0295)
Oil Ring
0.30–0.50
(0.014–0.020)