21735439 Volvo.Penta Gear

Illustration 1 g01417779
Section view of cylinder head valves
Note: Fully coat the assembled valve guide inner diameter with engine oil prior to valve installation. (1) Inlet valveValve stem diameter ... 8.000 0.010 mm (0.3150 0.0004 inch)Diameter of valve head ... 39.00 0.13 mm (1.535 0.005 inch) (2) Exhaust valveValve stem diameter ... 9.441 0.010 mm (0.3717 0.0004 inch)Diameter of valve head ... 36.00 0.13 mm (1.417 0.005 inch) (3) 241-8385 SpringLength under test force ... 44.0 mm (1.73 inch)Test force ... 305 15 N (68.6 3.3 lb)Approximate free length after test ... 67.69 mm (2.665 inch)Outside diameter ... 28.56 mm (1.124 inch) (4) 190-6117 SpringLength under test force ... 37.70 mm (1.484 inch)Test force ... 350 17 N (78.7 3.8 lb)Approximate free length after test ... 57.80 mm (2.276 inch)Outside diameter ... 31.79 mm (1.252 inch) (5) 190-6115 SpringLength under test force ... 36.5 mm (1.44 inch)Test force ... 187 8 N (42.0 1.8 lb)Approximate free length after test ... 57.80 mm (2.276 inch)Outside diameter ... 23.18 mm (0.913 inch) (6) 241-8386 SpringLength under test force ... 42.8 mm (1.69 inch)Test force ... 152.5 7.0 N (34.3 1.6 lb)Approximate free length after test ... 56.68 mm (2.231 inch)Outside diameter ... 21.33 mm (0.84 inch)Note: Lubricate the bores in the cylinder head for the valve guides with clean engine oil prior to installation. (A) Height of the valve guides above the top of the cylinder head ... 12.0 0.5 mm (0.47 0.02 inch) (7) Valve guide (inlet)Outside diameter ... 13.030 0.008 mm (0.5130 0.0003 inch)Bore in the cylinder head for the valve guide ... 13.000 0.013 mm (0.5118 0.0005 inch) (8) Valve guide (exhaust)Outside diameter ... 16.000 0.008 mm (0.6299 0.0003 inch)Bore in the cylinder head for the valve guide ... 15.970 0.013 mm (0.6287 0.0005 inch)
Illustration 2 g02137754
Detail B
Note: Shrink the valve seat inserts by reducing the temperature. Shrinking the valve seat inserts allows placement into the counterbore. (C) Depth of the bore in the cylinder head for the valve seat insertDepth (inlet) ... 9.30 0.05 mm (0.366 0.002 inch)Depth (exhaust) ... 10.40 0.05 mm (0.409 0.002 inch) (D) Outside diameter of the valve seat insertDiameter (inlet) ... 40.060 0.013 mm (1.5772 0.0005 inch)Bore in the cylinder head for the valve seat insert (inlet) ... 40.000 0.015 mm (1.5748 0.0006 inch)Diameter (exhaust) ... 37.560 0.013 mm (1.4787 0.0005 inch)Bore in the cylinder head for the valve seat insert (exhaust) ... 37.500 0.015 mm (1.4764 0.0006 inch)
Illustration 3 g02137776
View E-E of Detail B
(G) Angle of the face of the valve seat insertAngle (inlet) ... 30.25 0.25 degrees
Illustration 4 g02137835
View E-E of Detail B
(H) Angle of the face of the valve seat insertAngle (exhaust) ... 45.00 0.25 degrees
Illustration 5 g02137989
View F-F of Detail B
(J) Angle of the face of the valveAngle (inlet) ... 60.5 0.25 degrees
Illustration 6 g02137996
View F-F of Detail B
(K) Angle of the face of the valveAngle (exhaust) ... 45.75 0.25 degrees