
i02406197
Piston
Height
-
Inspect
Table
8
Required Tools
Tool
Part
Number
Part Description
Qty
A
21825617
Dial Gauge
1
B
21825496
Dial gauge holder
1
If the height of the piston above the cylinder block is
not within the tolerance that is given in the
Specifications Module, “Piston and Rings”, the
bearing for the piston pin must be checked. Refer to
Testing and Adjusting, “Connecting Rod - Inspect”. If
any of the following components are replaced or
remachined, the piston height above the cylinder
block must be measured:
• Crankshaft
• Cylinder head
• Connecting rod
• Bearing for the piston pin
The correct piston height must be maintained in order
to ensure that the engine conforms to the standards
for emissions.
Note:
The top of the piston should not be machined.
If the original piston is installed, be sure that the
original piston is assembled to the correct connecting
rod and installed in the original cylinder.
Three grades of length of connecting rods determine
the piston height above the cylinder block. The grade
of length of a connecting rod is identified by a letter or
a color. The letter or the color is marked on the side of
the connecting rod. Refer to Testing and Adjusting,
“Connecting Rod - Inspect” and Specifications,
“Connecting Rod” for additional information.
Illustration 45
g01201898
Typical example
1.
Use Tooling (A) and Tooling (B) in order to measure
the piston height above the cylinder block. Use the
cylinder block face to zero Tooling (A).
2.
Rotate the crankshaft until the piston is at the
approximate top center.
3.
Position Tooling (B) and Tooling (A) in order to
measure the piston height above the cylinder
block. Slowly rotate the crankshaft in order to
determine when the piston is at the highest
position. Record this dimension. Compare this
dimension with the dimensions that are given in
Specifications, “Piston and Rings”.
i02636429
Flywheel
-
Inspect
Table
9
Required Tools
Tool
Part
Number
Part Description
Qty
A
21825617
Dial Indicator Group
1
UENR0617
45
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