3-7. COOLING SYSTEM TROUBLESHOOTING (CONT)
TEST OR INSPECTION
1. ENGINE OVERHEATS (Cont).
Step 10. Check if there is wrong or contaminated fuel in fuel tank (contam-
inated fuel will have a milky white appearance).
a. If wrong or contaminated fuel in fuel tank, drain and clean fuel
t a n k ( p a g e 4 - 3 2 ) , r e p l a c e f u e l f i l t e r s ( p a g e 4 - 3 8 ) , a n d r e f i ll
w i t h c o r r e c t f u e l.
b. If fuel is okay, go to step 11 below.
Step 11. Check that coolant is 50-50 solution of Ethylene Glycol and water.
a . I f c o o l a n t is
Glycol and 50
b . I f c o o l a n t is
step 12 below.
not 50-50 solution of Ethylene Glycol and water,
from radiator and fill using 50 percent Ethylene
percent water (page 4-69).
50-50 solution of Ethylene Glycol and water, go to
Step 12. Check area around exhaust manifold for signs of coolant leakage.
a. If signs of coolant leakage are seen, notify next higher mainte-
nance level (cylinder head or cylinder sleeve(s) are cracked and
must be replaced).
b. If signs of coolant leakage are not seen, go to step 13 below.