Service Data Valve Guide

ITEM

STANDARD

LIMIT

Valve diameter

IN.

23 (0.9)

EX.

20 (0.8)

Valve clearance (when cold)

IN.

0.10 - 0.15 (0.004 - 0.006)

EX.

0.18 - 0.23 (0.007 - 0.009)

Valve-guide to valve-stem clearance

IN.

0.020 - 0.047 (0.0008 - 0.0019)

EX.

0.030 - 0.057 (0.0012 - 0.0022)

Valve stem deflection

IN. &EX.

0.35 (0.014)

Valve guide I.D.

IN. &EX.

5.000 - 5.012 (0.1969 - 0.1973)

Valve stem O.D.

IN.

4.965 - 4.980 (0.1955 - 0.1961)

EX.

4.955 - 4.970 (0.1950 - 0.1957)

Valve stem runout

IN. &EX.

0.05 (0.002)

Valve face thickness

IN. & EX.

0.5 (0.02)

Valve stem end length

IN. & EX.

2.5 (0.10)

Valve seat width

IN. & EX.

0.9 - 1.1 (0.035 - 0.043)

Valve head radial runout

IN. & EX.

0.03 (0.001)

Valve spring free length (IN. & EX.)

INNER

35.0 (1.38)

OUTER

38.4 (1.51)

Valve spring tension (IN. & EX.)

INNER

5.6 - 6.6 kgf (12.3 - 14.6 lbs) at length 28 mm (1.10 in)

OUTER

12.8 - 15.0 kgf (28.2 - 33.1 lbs) at length 31.5 mm (1.24 in)

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