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 TM 5-2420-224-34
ENGINE TESTING (CONT)
8.
Reduce engine speed to idle and run until engine temperatures stabilize.
9.
Stop engine and inspect engine for fuel, oil, and coolant leaks.
10. Remove the valve cover per TM 5-2420-224-20-2 and remove the rocker arm assemblies (page 13-37).
11. Following the sequence shown in Figure 1, loosen the number 1 (one) head bolt one-eighth to one-
quarter turn; then tighten the bolt to 81 lb-ft (110 N.m). Re-torque the remaining head bolts one at a time
using the same procedure. Under no circumstances must all bolts be loosened at once.
13
21
6
14
3
2
17
7
18
10
23
24
9
8
1
16
15
25
22
12
4
20
5
11
19
Figure 1
12. Install the rocker arm assemblies (page 13-40).
13. Adjust the valve lash per TM 5-2420-224-20-2.
14. Install the valve cover per TM 5-2420-224-20-2.
15. Run the engine according to the values listed in Table 1.
Time
Engine Speed
Minimum Oil
(minutes)
(RPM)
Pressure PSI
(BAR)
10
2600
29.0 (2.0)
10
1600
29.0 (2.0)
10
1170
29.0 (2.0)
10
750
9.0 (0.6)
Table 1
16. Stop engine. Check the fluid levels and look for any leaks. Correct as necessary. Remove from
dynamometer.
13-79/(13-80 Blank)
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