TM 9-2320-266-34
NOTE
Each used push rod and tappet must be
installed in its original location. New tap-
pets must be installed if a new camshaft is
to be installed.
11-11. Servicing the Camshaft.
The camshaft has an integral gear that drives the distrib-
utor; check the gear for damage. Inspect the camshaft itself
for damage, especially pits and flat spots. Measure the diam-
eters of the journals; if they are out of specification (table
1l-l), replace the camshaft.
11-12. Repair of Damaged or Worn Threads.
Refer to figure 11-29.
a. Damaged or worn threads can be repaired by using
Figure 11-28. Proper Rocker Arm Location on Shaft.
Heli-Coils or equivalent. This repair consists of drilling out
worn or damaged threads, tapping the hole with a Heli-Coil
11-10. Inspecting the Push Rods and Tappets.
tap, and installing a Heli-Coil insert into the tapped hole.
a. Push Rods. Check for worn or bent push rods; replace
This brings the hole back to its original thread size.
as necessary.
b. Tappets. Unless new tappets (lifters) are being installed,
block. It also gives the necessary tools and inserts for re-
check each tappet face for crown, using a straightedge. If you
pairing damaged or worn threads.
observe any negative crown (or dish), replace the tappet.
Figure 11-29. Heli-Coil or Equivalent Installation.
Table 11-4. HeIi-Coil Chart
Tap
Inserting
part no.
Extracting
Tap
Mopar
Thread
tool
Insert
tool
steel &
Heli-Coil
Drill
part no.
size
part no.
part no.
part no.
length
size
(aluminum)
iron
part no.
10-24
1185-3CN
9/32"
13/64"
3CPB
1187-3
2288-3
1/4-20
11854CN
17/64"
22884
5-40
3/8"
4CPB
1187-4
5-41
5/16-18
1185-5CN
21/64"
42187-5
2288-5
15/32"
5CPB
3/8-16
5-42
1185-6CN
9/16"
2288-6
25/64"
42187-6
6CPB
2288-7
7/16-14
5-43
1185-7CN
29/64"
7CPB
42187-7
21/32"
42187.8
2288-8
1/2-13
5-44
1185-8CN
33/64"*
8CPB
3/4"
17/32"**
*In aluminum
**In cast iron or steel
11-13
441-399 0 - 84 - 10
