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.
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