Illustration 13 Recess for a valve insert

Illustration 12 Inlet valves and exhaust valves

Illustration 15 Inlet valves and exhaust valves

TM-5-3895-382-24
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TM 5-3895-382-24 Maximum ..........................................................1.60 mm (.063 inch) Service wear limit............................................1.85 mm (.073 inch) (10) Inlet valve face angle............................................. 45 degrees Valve seat angle ............................................................ 46 degrees The valve lash is the following value when the engine is hot or cold: Inlet valves............................................0.20 mm (.008 inch) Exhaust valves ....................................0.45 mm (.018 inch) Illustration 13 Recess for a valve insert. (11) Machine the recess in the head for valve seat inserts to the following dimensions: Inlet (A) ................................................................ 7.19 to 7.32 mm ...............................................................(0.283 to 0.288 inch) (B) .......................................................51.220 to 51.240 mm .......................................................... (2.0167 to 2.0175 inch) (C) Maximum radius ..........................0.38 mm (.015 inch) Exhaust (A) ................................................................ 9.52 to 9.65 mm ...................................................................(.375 to .380 inch) (B) .......................................................42.620 to 42.650 mm .......................................................... (1.6779 to 1.6790 inch) (C) Maximum radius ...........................0.38 mm (.015 inch) NOTE: When a new valve seat insert is installed, a new valve and valve guide must be installed. Refer to the Disassembly and Assembly for removal and installation procedures. Illustration 14 Angles and dimensions of the valve seat insert. (12) Valve seat insert (D) Included angle of the faces (E) Dimension of chamfer (F) Vertical angle of chamfer (12) Valve seat insert (D) Included angle of the faces of the valve seat insert Naturally aspirated engine ................................ 88 degrees Turbocharged engine .....................................118 degrees (E) Dimension of chamfer for all engines ................................................1.10 ± 0.20 mm (.043 ± .008 inch) (F) Angle of chamfer from the vertical for all engines ........................................................ 30 degrees Type 2 Engines and 7BJ Engines NOTE: For a complete description of Type 1 and Type 2 engines, refer to the Specifications Module, "Engine Design" for more information. 5-14

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