Basic Engine; Piston Ring Groove - Inspect; Connecting Rod - Inspect - Perkins 1104E Systems Operation Testing And Adjusting

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Testing and Adjusting Section

Basic Engine

Piston Ring Groove - Inspect

Inspect the Piston and the Piston
Rings
1. Check the piston for wear and other damage.
2. Check that the piston rings are free to move in the
grooves and that the rings are not broken.
Inspect the Clearance of the Piston
Ring
1. Remove the piston rings and clean the grooves
and the piston rings.
Illustration 55
(1) Feeler gauge
(2) Piston ring
(3) Piston grooves
2. Fit new piston rings (2) in the piston grooves (3).
3. Check the clearance for the piston ring by placing
a suitable feeler gauge (1) between the piston
groove (3) and the top of piston ring (2). Refer
to Specifications, "Piston and Rings" for the
dimensions.
Note: Some pistons have a tapered top groove and
the piston ring is wedged. The clearance for the top
piston ring cannot be checked by the above method
when this occurs.
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Inspect the Piston Ring End Gap
Illustration 56
(1) Piston ring
(2) Cylinder ring ridge
(3) Feeler gauge
1. Clean all carbon from the top of the cylinder bores.
2. Place each piston ring (1) in the cylinder bore just
below the cylinder ring ridge (2).
3. Use a suitable feeler gauge (3) to measure the
piston ring end gap. Refer to Specifications,
"Piston and Rings" for the dimensions.
Note: The coil spring must be removed from the oil
control ring before the gap of the oil control ring is
measured.
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Connecting Rod - Inspect

This procedure determines the following
characteristics of the connecting rod:
•
The distortion of the connecting rod
•
The parallel alignment of the bores of the
connecting rod
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