(1) Draw engine oil sample from sampling
valve (TM 10-3930-673-10).
(2) Examine sample to determine if oil is
diluted with coolant.
(a) If oil is diluted with coolant, inspect
oil cooler (Para 3-26), cylinder
head and gasket (Para 3-7), and
engine block (Para 3-6) for damage
and leaks. Replace damaged
components as necessary.
Change oil and filter.
(b) If engine oil is not diluted, go to
Step 3 of this fault.