Defender. Manual — part 67
Engine System - General Information - Piston Pin to Bore Diameter
General Procedures
1. NOTE: The piston and piston pin form a matched pair. Do
not mix up the components.
Measure the diameter of the piston pin bore.
Measure the diameter in two directions.
If the values are not to specification, install both a new
piston and a new piston pin.
Engine System - General Information - Piston Ring End Gap
General Procedures
1.
CAUTION: Do not mix up the piston rings. Install the
piston rings in the same position and location.
Using the Feeler Gauge, measure the piston ring gap.
The values given in the specification refer to a gauge
ring used during production.
Engine System - General Information - Piston Ring-to-Groove Clearance
General Procedures
1. NOTE: The piston ring must protrude from the piston groove.
To determine the piston ring clearance, insert the Feeler Gauge
right to the back of the groove, behind the wear ridge.
Using the Feeler Gauge, measure the piston ring clearance.
Engine System - General Information - Valve Spring Free Length
General Procedures
1. Using a vernier gauge, measure the free length of each valve
spring. Verify the length is within specification.
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