TM 5-3805-262-20
3-7. COOLING SYSTEM TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ENGINE OVERHEATS (Cont).
Step 13. Allow engine to cool and remove radiator cap.
Rinse radiator cap with clear water and install on cap adapter and
pressure tester as shown .
NOTE
I t m a y b e n e c e s s a r y
s t a l l r a d i a t o r c a p
times to ensure tight
t o r e i n -
s e v e r a l
s e a l.
Operate pressure tester
pump and watch meter
r e a d i n g a t i t s h i g h e st
point. Cap release pres-
sure should be 6-1/2 to
7-1/2 pounds, and should
remain steady for at least
30 seconds.
a. If radiator cap pressure is 6-1/2 to 7-1/2 pounds, and remains
steady for at least 30 seconds before dropping, go to step 14
below.
b. If radiator cap pressure is not 6-1/2 to 7-1/2 pounds, or if
p r e s s u r e d r o p s r a p i d l y , r e p l a c e r a d i a t o r c a p.
Step 14. Remove radiator cap.
Remove engine left and right
side panels if not already
removed (page 9-14).
Remove alternator drive belts
(page 5-4).
Drain coolant from radiator to
just below upper radiator hose
port (page 4-69).
Disconnect upper radiator hose
from thermostat housing (page
4-74).
Remove thermostat housing and
thermostats (page 4-89).
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