TM 5-3805-261-34
ENGINE MAINTENANCE. (cont)
13-3.
Cylinder Head Assembly Overhaul. (Sheet 3 of 6)
CLEANING
Clean all parts. Refer to Chapter 2.
INSPECTION/REPAIR
1.
Position cylinder head on its
intake port surface.
2.
Insert gage or equivalent through
fuel injection nozzle hole
alining one end of gage with
straight edge placed across
combustion surface and measure
thickness (Figure 13-6). Replace
if gage extends above combustion
surface or head thickness is less
than 3.774 inches. Repeat
measurement at all nozzle holes
(Figure 13-7).
3.
Using a 24 inch straight edge and
feeler gage, check flatness of
combustion surface. Measure
surface along each edge and both
diagonals indicated as points "A"
(Figure 13-8). If more than
0.006 inch from flat, discard and
replace head. If less than 0.006
inch from flat, refer to step 11
for machining instructions to
correct warpage. Check areas
between valve ports shown as
points "B" must be 0.003 inch or
flatter.
Figure 13-6.
Figure 13-7.
Figure 13-8.
Go to Sheet 4
13-12
