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Cylinder Head Inspection:
• Check spark plug and valve seats for cracking.
• Measure cylinder head warp with a straightedge
and thickness gauge.
• Service limit: 0.05 mm
Camshaft
• Inspect cam lobe height for damaged.
• Service Limit:
IN: Replacement when less than 33.392mm
EX: Replacement when less than 33.277mm
• Inspect the camshaft bearing for damage
or wear. If damaged, replace set of camshaft
and cylinder head.
Rocker Arm
• Measure the cam rocker arm I.D., and inspect for
wear or damage
Service Limit:
Replace when it is less than 12.080 mm.
Rocker Arm Shaft
• Measure the O.D. of the cam rocker arm shaft and
cam rocker arm.
Service Limit:
Replace when it is less than 11.936 mm.
• Calculate the clearance between the rocker arm
shaft and the rocker arm.
Service Limit:
Replace when it is greater than 0.10mm.
Valve spring free length
• Measure the free length of intake and exhaust
valve springs.
Service limit:
Inner spring 32.5 mm
Outer spring 36.0 mm
Valve stem:
• Check if valve stems are bent, cracked, or burnt.
• Check the condition of valve stem in the valve
guide then measure & record the valve stem
outer diameter.
Service Limit:
IN: 4.90 mm
EX: 4.90 mm
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