TM-9-2320-280-20-2
TRUCK, UTILITY: M998 SERIES
TECHNICAL MANUAL; UNIT MAINTENANCE; VOLUME 2 OF 3
JANUARY 1996
TM-9-2320-280-20-2 - Page 158 of 951
3-77. WATER CROSSOVER MAINTENANCE
This task covers:
a.
Removal
c.
Installation
b. Inspection
a. Removal
1.
Loosen three clamps (2) and disconnect hoses (1) from water crossover (4).
2.
Remove four capscrews (6) from water crossover (4) and cylinder head (8).
WARNING
Gaskets installed on some 6.2L engines assembled prior to 1991
may contain asbestos. Gaskets should be removed with a scraper
or putty knife and then be disposed of IAW current directives.
Inhalation of asbestos fibers can cause respiratory ailments.
3.
Remove water crossover (4) and two gaskets (7). Discard gaskets (7).
4.
Clean gasket surface on water crossover (4) and cylinder head (8).
INITIAL SETUP:
Tools
General mechanic’s tool kit:
automotive (Appendix B, Item 1)
Materials/Parts
Two gaskets (Appendix G, Item 51)
Manual References
TM 9-2320 280-24P
Equipment Condition
•Cooling system drained (para. 3-60).
•Fan temperature switch removed (para. 4-30).
•Glow plug controller removed (para. 4-29).
•Thermostat removed (para. 3-75).
General Safety Instructions
Gaskets installed on some 6.2L engines assembled
prior to 1991 may contain asbestos. Gaskets
should be disposed of IAW current directives.
c. Installation
b. Inspection
1.
Install two gaskets (7) and water crossover (4) on cylinder head (8).
2.
Secure water crossover (4) to cylinder head (8) with four capscrews (6). Tighten capscrews (6) to
25-35 lb-ft (34-50 N
•
m).
3.
Connect three hoses (1) to water crossover (4) with clamps (2).
TM 9-2320-280-20-2
3-132
Change 3
Inspect thermostat by-pass nipple (3), surge tank hose nipple (5) and water pump hose adapter (9) for
cracks or breaks. Replace if defective.
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