TM 5-3805-281-24-2
Cylinder Head and Valves
ITEM
SPECIFICATION
WEAR LIMIT
Valve Recess in Cylinder Head:
Intake ...........................................................................................................
3.35--3.86 mm (0.132--0.152 in.)
4.62 mm (0.182 in.)
Exhaust ........................................................................................................
1.19--1.70 mm (0.047--0.067 in.)
2.46 mm (0.097 in.)
Maximum Valve Seat Runout .....................................................................
0.051 mm (0.0020 in.)
_____
Maximum Valve Face Runout .....................................................................
0.051 mm (0.0020 in.)
_____
Cylinder Firing Order ...................................................................................
1-5-3-6-2-4
_____
Rocker Arm I.D. ...........................................................................................
19.07--19.10 mm (0.7507--0.7520 in.)
_____
Rocker Arm Shaft O.D. ...............................................................................
19.01--19.05 mm (0.7484--0.7500 in.)
_____
Cylinder Head Reconditioning:
Thickness of Head
(Rocker Arm Cover Gasket Rail-to-Combustion Face) ..............................
155.45--155.71 mm (6.120--6.130 in.)
_____
Minimum Acceptable Head Out-of-Flat
(Entire Length or Width) ..............................................................................
0.102 mm (0.0040 in.)
_____
Combustion Face Surface
Finish (Surface Mill Only) ............................................................................
60--110AA
_____
Maximum Material Removal
for Resurfacing Head ..................................................................................
0.762 mm (0.0300 in.)
_____
Cylinder Head-To-Cylinder Block:a
Flanged-Head "SPECIAL" Cap Screws (No Washers)
Step 1 ............................................................................................................................................................................................. 80 Nm (60 lb-ft)
Step 2b .............................................................................................................................................................................. Tighten an additional 90
Step 3b .............................................................................................................................................................................. Tighten an additional 90
Step 4b .............................................................................................................................................................................. Tighten an additional 90
Rocker Arm Shaft Clamps .............................................................................................................................................................. 75 Nm (55 lb-ft)
Rocker Arm Cover-to-Cylinder Head ................................................................................................................................. 8 Nm (6 lb-ft) (72 lb-in.)
Intake Manifold-to-Cylinder Head ................................................................................................................................................... 47 Nm (35 lb-ft)
Exhaust Manifold-to-Cylinder Head ................................................................................................................................................ 47 Nm (35 lb-ft)
Valve Adjusting Screw Lock nut ..................................................................................................................................................... 27 Nm (20 lb-ft)
a
See TORQUE-TO-YIELD FLANGED-HEAD CAP SCREWS--GRADE 180 MARKED "SPECIAL", later in this group, for proper cap screw
tightening sequence.
Total of three turns MUST TOTAL 270 5.
b
RG,RG34710,1066
1923OCT972/2
11-89
