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c）Connecting rod big end oil clearance
Wipe oil off the crank pin and connecting rod bearing mating surface.
Set the plastic gauge on the crank pin, connecting rod and bolt to specified torque. Torque：13±1N.m
NOTICE: Place the plastic gauge axially.
Remove connecting rod and measure with plastic gauge.
If the clearance exceeds the service limit, replace the connecting rod and recheck the clearance.
④ Camshaft check
The camshaft is main driving part of the train valve mechanism, which controls the intake and exhaust
valves opening and closing.
Feature: The shaft is equipped with cam and journal which can control intake and exhaust. When operating,
camshaft operating face and lifter will be badly rubbed from periodically impacting and easily be damaged.
So, the camshaft shall be wearable and lubrication well.
Visually inspect cams’ surface and cams’ height for damaged, and
camshaft bore for loosening and wearing, replace as required.
Check camshaft for height dimension. If out of the service limit,
replace the camshaft.
Standard Service limit
0.019-0.049mm 0.120mm
Standard Service limit
IN lifter 23.98mm 23.730mm
EX lifter 27.88 mm 27.630mm
Plastic feeler with scale
Plastic feeler
Bolt