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| Illustration 1 | g00285625 |
Note: Coat the inlet and the exhaust valve stems with 8T-2998 Lubricant prior to installation in the cylinder head.
(1) 102-7665 Spring
- Assembled length … 66.00 mm (2.598 inch)
- Load at assembled length … 389 ± 19 N (87 ± 4 lb)
- Minimum operating length … 50.00 mm (1.969 inch)
- Load at minimum operating length … 1077 ± 54 N (242 ± 12 lb)
- Free length after test … 75 mm (3 inch)
- Outside diameter … 36.90 mm (1.453 inch)
(2) Height to top of valve guide … 35.0 ± 0.5 mm (1.38 ± 0.02 inch)
(3) Diameter of new valve stem … 9.441 ± 0.008 mm (0.3717 ± 0.0003 inch)
The minimum dimension before replacement of the valves is the following dimension.
152-7585 Exhaust Valve … 9.408 mm (0.3704 inch)
152-8380 Inlet Valve … 9.408 mm (0.3704 inch)
The new valve guide bore after the installation into the head is the following value. … 9.487 ± 0.025 mm (0.3735 ± 0.0010 inch)
The “use again” dimension of the valve guide bore … 9.538 mm (0.3755 inch)
(4) The diameter of the valve head is the following dimension.
Exhaust valve … 41.81 ± 0.13 mm (1.646 ± 0.005 inch)
Inlet valve … 47.00 ± 0.13 mm (1.850 ± 0.005 inch)
(5) Angle of face of valve seat insert
- Inlet valve … 29 1/4 ± 1/4 degrees
- Exhaust valve … 44 1/4 ± 1/4 degrees
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| Illustration 2 | g00285626 |
(6) Depth of bore in head for valve seat insert … 14.00 ± 0.10 mm (0.551 ± 0.004 inch)
(7) Diameter of valve seat insert for inlet valve … 48.025 ± 0.013 mm (1.8907 ± 0.0005 inch)
Bore in head for valve seat insert for inlet valve … 47.950 ± 0.025 mm (1.8878 ± 0.0010 inch)
Diameter of valve seat insert for exhaust valve … 42.840 ± 0.013 mm (1.6866 ± 0.0005 inch)
Bore in head for valve seat insert for exhaust valve … 42.774 ± 0.025 mm (1.6840 ± 0.0010 inch)
(8) Angle of face of inlet valve seat insert … 30 ± 1 degrees
Angle of face of exhaust valve seat insert … 45 ± 1 degrees
(9) This is the distance between the cylinder head and the head of the closed valve. This dimension is for new parts. The dimension should be the following value.
Inlet valve … 2.50 ± 0.30 mm (0.098 ± 0.012 inch)
Exhaust valve … 1.50 ± 0.30 mm (0.059 ± 0.012 inch)
(10) The outside diameter of the face of the valve seat insert is the following dimension.
Exhaust seat … 40.41 ± 0.13 mm (1.591 ± 0.005 inch)
Inlet seat … 44.04 ± 0.13 mm (1.734 ± 0.005 inch)
(11) “Use again” thickness of the valve lip
- Exhaust valve … 2.05 mm (0.081 inch)
- Inlet valve … 3.02 mm (0.119 inch)