TM 5-2420-231-23-1
0009
Table 1. Coolant in Engine Oil.
0009
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. Remove engine oil dipstick
Coolant in Engine Oil
No Coolant/Oil Mixture Identified -
(TM 5-2420-231-10) and inspect
Proceed to step 2.
for coolant and oil mixture.
Coolant and Oil Mixture Identified -
Drain and flush coolant and oil mixture
from system and replace filter (WP
0126). Repeat step 1 and if no mixture
is observed, proceed to step 3.
2. Visually inspect mating surface
No Signs of Leakage in Mating
where cylinder head and engine
Surface - Troubleshooting complete.
block meet (Figure 1, Item 1) for
Signs of Leakage in Mating Surface -
signs of coolant leakage.
Proceed to step 3.
Figure 1. Cylinder Head and Engine Block Mating Surface.
0009
3. Remove cylinder head (WP 0111).
Cylinder Head and Gasket OK -
Proceed to step 4.
Inspect cylinder head and gasket
for cracks between valves, breaks,
Cylinder Head Cracked or Damaged
- Replace cylinder head (WP 0111).
or damage.
Proceed to step 5.
Cylinder Head Gasket Damaged or
Signs of Leakage - Replace cylinder
head gasket (WP 0111).
Proceed to step 5.
