User Manual

If the height of the piston above the cylinder block is
not within the tolerance that is given in Specifications,
“Piston and Rings”, the bearing for the piston pin
must be checked. Refer to Systems Operation,
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.
Illustration 70 g01201898
Typical example
Illustration 71 g02351060
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. The piston height should be measured at
positions (X) or (Y). 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”.
i03635082
Flywheel - Inspect
Table 11
Required Tools
Tool
Part
Number
Part Description Qty
A
21825617
Dial Indicator Group 1
82 UENR0623-02
Basic Engine
This document has been printed from SPI2. NOT FOR RESALE