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ENGINE TOP END 4-21
Piston Removal
.Remove the cylinder (see this chapter).
.Place a clean cloth under the pistons and remove the
piston pin snap rings from the outside of each piston.
.Using the piston pin puller assembly (special tool),
remove the piston pins.
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4. Oil Ring Expander
5. Arrow
1.TopRing
2. Second Ring
3. Oil Ring Steel Rails
Piston Installation
.The top and second rings must be installed with the R
marks on the rings facing up.
Cylinder Wear
.Measure the cylinder inside diameter taking a
side-to-side and a front-to back measurement at each
of the two positions (total of four measurements)
shown below.
2. Second Ring
1. Top Ring
.The arrow on the piston head must point toward the
front of the engine.
.The piston ring openings must be positioned as shown
below. The openings of the oil ring steel rails must be
about 30 -40° of angle from the opening of the top
rinc.
Cylinder Inside Diameter:
Standard: 57.000 -57.012 mm
Service limit: 57.10 mm