Usage:
NOTE: Guideline For Reusable Parts: Valve And Valve Springs, Forms SEBF8002 and SEBF8034 have the procedures and specifications necessary for checking used valves and valve springs.
Valve clearance setting; engine stopped;
Intake valve ... 0.38 mm (.015 in.)
Exhaust valve ... 0.89 mm (.035 in.)
(1) 9M5350 Spring (outer):
Length under test force ... 56.36 mm (2.219 in.)
Test force ... 289 ± 30 N (65 ± 7 lb.)
Use again minimum load at length under test force ... 193.5 N (43.5 lb.)
Length of spring at valve open position ... 41.00 mm (1.614 in.)
Use again minimum load at valve open position ... 662 N (148.8 lb.)
Free length after test ... 65.38 mm (2.574 in.)
Outside diameter ... 43.51 mm (1.713 in.)
Spring must not be bent more than ... 2.29 mm (.090 in.)
(1) 9M5349 Spring (inner):
Length under test force ... 45.49 mm (1.791 in.)
Test force ... 89 ± 9 N (20 ± 2 lb.)
Use again minimum load at length under test force ... 60 N (13.5 lb.)
Length of spring at valve open position ... 30.15 mm (1.187 in.)
Use again minimum load at valve open position ... 192 N (43.1 lb.)
Free length after test ... 53.35 mm (2.179 in.)
Outside diameter ... 28.57 mm (1.125 in.)
Spring must not be bent more than ... 1.93 mm (.076 in.)
(2) Distance between top of valve guide and top of head ... 44.45 ± 0.51 mm (1.750 ± .020 in.)
(3) Length of guide:
Intake valve guide ... 128.5 ± 1.0 mm (5.06 ± .04 in.)
Exhaust valve guide ... 138.2 ± 1.0 mm (5.44 ± .04 in.)
(4) Diameter of valve stem:
Intake Valve (new) ... 9.441 ± 0.013 mm (.3717 ± .0005 in.)
Use again minimum ... 9.309 mm (.3665 in.)
Exhaust Valve (new):
Head end ... 9.416 ± 0.013 mm (.3707 ± .0005 in.)
Keeper end ... 9.441 ± 0.013 mm (.3717 ± .0005 in.)
Use again minimum ... 9.284 mm (.3655 in.)
Bore in valve guide after installation:
Valve guides (new) ... 9.484 mm (.3734 in.)
Maximum permissible bore in valve guide:
(worn) ... 9.545 mm (.3758 in.)
(5) Thickness of valve lip:
Intake valve, use again minimum ... 3.78 mm (.149 in.)
2W3211 Exhaust Valve, use again minimum ... 3.56 mm (.140 in.)
7C5914 Exhaust Valve (low emission), use again minimum ... 5.51 mm (.217 in.)
(6) Diameter of valve head:
Intake valve ... 63.63 ± 0.13 mm (2.505 ± .005 in.)
2W3211 Exhaust valve ... 59.69 ± 0.13 mm (2.350 ± .005 in.)
7C5914 Exhaust valve (low emission) ... 60.42 ± 0.13 mm (2.379 ± .005 in.)
(7) Angle of valve face.
Intake valve ... 29 1/4 ± 1/4°
2W3211 Exhaust Valve ... 29 1/4 ± 1/4°
7C5914 Exhaust Valve (low emission) ... 19 1/4 ± 1/4°
(8) Depth of bore in head for valve seat insert ... 16.167 ± 0.127 mm (.6365 ± .0050 in.)
Width of valve seat insert ... 15.875 ± 0.064 mm (.6250 ± .0025 in.)
Distance from top of valve seat insert to face of head ... 0.292 ± 0.190 mm (.0115 ± .0075 in.)
(9) Bore in head for standard size intake valve seat insert ... 65.697 ± 0.013 mm (2.5865 ± .0005 in.)
Diameter of intake valve seat insert ... 65.786 ± 0.013 mm (2.5900 ± .0005 in.)
Bore in head for standard size exhaust valve seat insert ... 61.760 ± 0.013 mm (2.4315 ± .0005 in.)
Diameter of exhaust valve seat insert ... 61.849 ± 0.013 mm (2.4350 ± .0005 in.)
(10) Angle of the face of the valve seat insert ... 30°
Intake valve seat insert ... 30 ± 1/4°
Exhaust valve seat insert ... 30 ± 1/4°
Exhaust valve seat insert (low emission) ... 20 ± 1/4°
(11) Maximum permissible width of valve seat for a new cylinder head:
Exhaust valve ... 1.91 mm (.075 in.)
Intake valve ... 1.91 mm (.075 in.)
(12) Dimension from top of closed valve to face of head:
Maximum permissible dimension for intake valve ... 4.32 mm (.170 in.)
Minimum permissible dimension for intake valve ... 3.05 mm (.120 in.)
Maximum permissible dimension for 2W3211 Exhaust Valve ... 4.32 mm (.170 in.)
Minimum permissible dimension for 2W3211 Exhaust Valve ... 3.05 mm (.120 in.)
Maximum permissible dimension for 7C5914 Exhaust Valve (low emission) ... 6.30 mm (.248 in.)
Minimum permissible dimension for 7C5914 Exhaust Valve (low emission) ... 4.88 mm (.192 in.)
(13) Outside diameter of the face of the valve seat insert for a new cylinder head:
Intake seat ... 62.41 mm (2.457 in.)
Maximum permissible, intake seat ... 63.75 mm (2.510 in.)
Exhaust seat ... 58.47 mm (2.302 in.)
Maximum permissible, exhaust seat ... 59.69 mm (2.350 in.)
(14) Angle to grind seat face of the insert to get a reduction of maximum seat diameter ... 15°