Engine / Cooling
3.50
Engi ne Inspec tion -- All Engines
4. Inspect each cylinder for wear , scratches, or damage.
If no damage is evident, measure cylinder for taper and
out of round with a telescoping gauge and micrometer
or a dial bore gauge. Measure bore 1/2² down from top
of cylinder in two directions - in line with piston pin and
90° to the pin to determine if bore is out of round.
Repeat measurements at bottom of cylinder to
determine taper or out of round at the bottom. Record
all measurements.
NOTE: If cylinders are worn or damaged refer to page
3.54-3.55 for boring/honing and port chamfer informa-
tion.
5. Clean needle bearing in solvent and dry with
compressed air.
6. Inspect needle cage carefully for cracks or shiny
spots which indicate wear . Replace needle bearings
if worn or cracked, and always replace them if piston
damage has occurred.
7. Visually inspect piston pin for damage, discoloration,
or wear. Run your fingernail along the length of the pin
and replace it if any rough spots, galling or wear is
detected. Measure piston pin.
Piston Pin Diameter
19.995 - 19.998mm
To Next Page
Loading...