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350 AND 403 ENGINE
6A4-27
INSERT FEELER GAUGE AT
TOP OF RlNG GROOVE TO
MEASURE R lNG SIDE CLEARANCE
COMPRESSION
< i G >
Fig.
6A4-73
Piston Ring Side Clearance
RlNG IDENTIFICATION A N D
INSTALLATION (FIG. 6A4-74)
NOTE: For service ring specifications and detailed
installation instructions, refer to the instructions
furnished with the parts package.
Fig.
6A4-7
1 Piston Rings
\
_/
-
PERFECT C I R C L E
-
.
' . .
-
-
- -
_Ji
L
Fig.
6A4-72
Measuring Piston Ring Gap
Side Clearance
Each ring must be checked for side clearance in its
respective piston groove by inserting a feeler gauge between
the ring and its upper land. (Fig. 6A4-73) The piston grooves
must be cleaned before checking ring for side clearance.
NOTE: To check oil ring side clearance, the oil rings
must be installed on the piston.
ALLOWABLE SIDE CLEARANCE
Compression Rings
-
.002" to
.004"
Oil Rings
-
,001" to .005"
Fig.
6A4-74
Piston Ring Identification
ROD A N D PISTON ASSEMBLY
Installation
1. Install connecting rod bolt guide hose over rod bolt
threads. (Fig. 6A4-75)
2. Apply engine oil to rings and piston, then install piston
ring compressing tool on piston. (Fig. 6A4-76)
3. Install assembly in its respective cylinder bore so
notch cast in top of piston is towards the front of engine.
4. Lubricate the crankshaft journal with engine oil and
install connecting rod bearing and cap, with bearing index
tang in rod and cap on same side.
NOTE: When more than one rod and piston assembly
is being installed, the connecting rod cap attaching nuts
should only be tightened enough to keep each rod in
position until all have been installed. This will facilitate
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