California Air Tools 3010 Service Manual download pdf (Page 137)

100

101

ENGINE TOP END 5-21

Valves

Valve Spring Free Length

•

Measure the valve spring free length.

If the free length is less than the service limit, replace the

valve spring [A] with a new one.

ValveSpringFreeLength

Standard: 30.7 mm (1.2087 in.)

Service Limit: 29.7 mm (1.1693 in.)

Valve Head Thickness

•

Measure the thickness [A] of the valve head.

If the valve head thickness is less than the service limit,

replace the valve with a new one.

Valve Head Thickness

Standard: 1.2 mm (0.0472 in.)

Service Limit: 1.0 mm (0.0394 in.)

Valve Stem Diameter

•

Measure the diameter of the valve stem at specified dis-

tance from end of the valve [A] as shown i n the figure.

35 mm (1.38 in.) [B]

If any single measurement is less than the service limit,

replace the valve with a new one.

Valv e Stem Diam eter

Standard:

Inlet

5.945 ∼ 5.960 mm (0.2341 ∼ 0.2346 in.)

Exhaust

5.965 ∼ 5.980 mm (0.2348 ∼ 0.2354 in.)

Service Limit:

Inlet

5.903 mm (0.2324 in.)

Exhaust

5.923 mm (0.2332 in.)

Valve Guide Inspection

•

Measure the inside diameter of the valve guide.

If the valve guide has worn past the service limit, replace

the valve guide or cylinder head.

Valve Guide Insid e Di ameter

Standard: 6.000 ∼ 6.015 mm (0.2362 ∼ 0.2368 in.)

Service Limit: 6.036 mm (0.2376 in.)

○

Measure the outside diameter of the valve guide re-

moved.

If the diameter is 11.05 mm (0.4350 in.), replace it with a

replacement valve guide.

If the diameter is 11.08 mm (0.4362 in.), it is a replace-

ment valve guide. Replace the cylinder head.

Valve Guide Outside Diameter

Standard Valve Guide: 11.05 mm (0.4350 in.)

Replacement Valve Guide: 11.08 mm (0.4362 in.)

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California Air Tools 3010 Service Manual Page 137

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