3208 INDUSTRIAL ENGINE ATTACHMENTS – Valves

NOTE: Guideline For Reusable Parts; Valves And Valve Springs, SEBF8002 and SEBF8034, have the procedure and specifications necessary for checking used valves and valve springs.

(1) 9N5496 Spring for valves (outer):

Length under test force … 45.47 mm (1.790 in)

Test force … 185.0 ± 18.0 N (41.57 ± 4.04 lb)

Use again minimum load at length under test force … 166 N (37.3 lb)

Length of spring at valve open position … 30.23 mm (1.190 in)

Use again minimum load at valve open position … 600 N (135.0 lb)

Free length after test … 51.77 mm (2.038 in)

Outside diameter … 39.62 mm (1.560 in)

Spring must not be bent more than … 1.80 mm (.071 in)

(1) 9N5495 Spring for valves (inner):

Length under test force … 42.47 mm (1.672 in)

Test force … 91.2 ± 9.0 N (20.49 ± 2.02 lb)

Use again minimum load at length under test force … 81.9 N (18.40 lb)

Length of spring at valve open position … 27.23 mm (1.072 in)

Use again minimum load at valve open position … 295 N (66.3 lb)

Free length after test … 48.77 mm (1.920 in)

Outside diameter … 26.67 mm (1.050 in)

Spring must not be bent more than … 1.70 mm (.067 in)

(2) Distance from the end of the valve to the valve spring spacer seat … 52.40 ± 0.38 mm (2.063 ± .015 in)

(3) Diameter of valve stem:

7C0362 and 9L7682 Inlet Valve … 9.462 ± 0.013 mm (.3725 ± .0005 in)

Use again minimum diameter of the valve stem … 9.42 mm (.371 in)

9N5125 Exhaust Valve (tapered stem):

Head end of valve stem … 9.411 ± 0.013 mm (.3705 ± .0005 in)

Use again minimum diameter of the head end of valve stem … 9.37 mm (.369 in)

Lock end of valve stem … 9.436 ± 0.013 mm (.3715 ± .0005 in)

Use again minimum diameter of the lock end of valve stem … 9.408 mm (.3704 in)

Bore in the valve guides (inlet and exhaust) … 9.512 ± 0.013 mm (.3745 ± .0005 in)

Maximum permissible bore in the valve guides (worn):

Measure 19.0 mm (.75 in) deep in valve guide bore from both ends of the valve guide … 9.550 mm (.3760 in)

(4) Angle of valve face:

Inlet valve … 30 degrees ± 1/4

Exhaust valve … 45 degrees ± 1/4

(5) Diameter of valve head (inlet valve) … 53.19 ± 0.13 mm (2.094 ± .005 in)

Diameter of valve head (exhaust valve) … 45.82 ± 0.13 mm (1.804 ± .005 in)

(6) Thickness of valve lip:

Inlet valve … 2.31 mm (.091 in)

Use again minimum valve lip thickness … 1.78 mm (.070 in)

Exhaust valve … 1.60 mm (.063 in)

Use again minimum valve lip thickness … 1.27 mm (.050 in)