156636-2220 ZEXEL 9 423 617 188 BOSCH COUPLING PLATE 9423617188 1566362220 16820l9200

(1) Diameter of the valve seat insert ... 54.610 0.013 mm (2.1500 .0005 in) Bore in head for valve seat insert ... 54.534 0.013 mm (2.1470 .0005 in)(2) Depth of bore in head for valve seat insert ... 11.23 0.05 mm (.442 .002 in)(3) Maximum permissible width of the face of the valve seat insert ... 3.05 mm (.120 in)(4) Distance from head of valve to cylinder head face: Maximum permissible (valve closed) ... 1.73 mm (.068 in)Minimum permissible (valve closed) ... 0.91 mm (.036 in)(5) Angle of the face of the valve seat insert ... 30 1/2 1/2°(6) Outside diameter of the face of the valve seat insert ... 52.23 0.13 mm (2.045 .005 in) Maximum permissible ... 52.45 mm (2.065 in)(7) Angle to grind face of seat insert (to get a reduction of maximum seat diameter) ... 15°Intake Valve (without valve seat insert)
(1) Distance from head of valve to cylinder head face: Maximum permissible (valve closed) ... 1.73 mm (.068 in)Minimum permissible (valve closed) ... 0.91 mm (.036 in)(2) Maximum permissible width of the face of the valve seat ... 3.05 mm (.120 in)(3) Outside diameter of the valve seat ... 52.23 0.13 mm (2.045 .005 in) Maximum permissible ... 52.45 mm (2.065 in)(4) Angle of the face of the valve seat ... 30 1/2 1/2°(5) Diameter of the bore ... 54.61 mm (2.150 in)(6) Maximum permissible depth of the bore to make the face of the valve seat smaller ... 4.32 mm (.170 in)Exhaust Valve
(1) Depth of bore in head for valve seat insert ... 11.23 0.13 mm (.442 .005 in)(2) Diameter of valve seat insert ... 48.565 0.013 mm (1.9120 .0005 in) Bore in head for valve seat insert ... 48.489 0.013 mm (1.9090 .0005 in)(3) Maximum permissible width of the face of the valve seat insert ... 2.67 mm (.105 in)(4) Distance from head of valve to cylinder head face: Maximum permissible (valve closed) ... 2.16 mm (.085 in)Minimum permissible (valve closed) ... 1.27 mm (.050 in)(5) Angle of the face of the valve seat insert ... 45 1/2 1/2°(6) Outside diameter of the face of the valve seat insert ... 44.07 0.13 mm (1.735 .005 in) Maximum permissible ... 44.70 mm (1.760 in)(7) Angle to grind face of seat insert (to get a reduction of maximum seat diameter) ... 15°