Piston Height - Inspect - Perkins 854E-E34TA Systems Operation Testing And Adjusting

76
Basic Engine
3. Inspect the cylinder head for signs of gas or
coolant leakage.
4. Remove the valve springs and valves.
5. Clean the bottom face of the cylinder head
thoroughly. Clean the coolant passages and the
lubricating oil passages. Make sure that the
contact surfaces of the cylinder head and the
cylinder block are clean, smooth, and flat.
6. Inspect the bottom face of the cylinder head for
pitting, corrosion, and cracks. Inspect the area
around the valve seat inserts and the holes for the
fuel injection nozzles carefully.
7. Test the cylinder head for leaks at a pressure of
200 kPa (29 psi).
Illustration 67
Flatness of the cylinder head (typical example)
(A) Side to side
(B) End to end
(C) Diagonal
8. Measure the cylinder head for flatness. Use a
straight edge and a feeler gauge to check the
cylinder head for flatness.
• Measure the cylinder head from one side to the
opposite side (A).
• Measure the cylinder head from one end to the
opposite end (B).
• Measure the cylinder head from one corner to
the opposite corner (C).
Refer to Specifications, "Cylinder Head" for more
information.
This document is printed from SPI². Not for RESALE

Piston Height - Inspect

Table 10
Tool Number
21825617
A
21825496
B
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.
g02490336
Illustration 68
Typical example
Required Tools
Part
Part Description
Dial Gauge
Dial gauge holder
UENR0623
i04156372
Qty
1
1
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