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CHAPTER 3 ENGINE
Chain Tensioner
Inspection
Check tensioner for any damage or poor function.
Damage, poor function: →Replace
Insert screw driver into the slotted end of adjusting
screw, turn it clockwise to loosen the tension and
release the screwdriver.
Check the push rod movement. If the push rod is
stuck or there is a failure with spring mechanism,
replace the chain tensioner with a new one.
Cylinder
Cylinder Distortion
Check the gasket face of cylinder for distortion with
a straightedge and thickness gauge and take
clearance readings at 7 points as illustrated. If the
largest reading at any of the 7 points of the
straightedge is out of the range, replace the
cylinder.
Cylinder Distortion Service Limit: 0.05mm
Tool: Straightedge
Thickness Gauge
Cylinder Bore
Check cylinder wall for scratches, nicks or other
damage. Replace with a new one if any.
Measure cylinder bore diameter at three points of
upper, middle and lower.
Standard Cylinder Bore: 87.500-87.522mm
Tool: Cylinder Gauge Set
T-Boss550 SERVICE MANUAL20.0
CHAPTER 3 ENGINE
PAGE. 3- 57
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