2-4. ENGINE TROUBLESHOOTING (CONT)
TEST OR INSPECTION
9. EXCESSIVE OIL CONSUMPTION (Cont).
Step 10. (Cont).
a. If connecting rod inserts are worn,
b. If connecting rod inserts are okay,
replace (page 4-42).
check cylinder sleeves for
scoring (page 4-8) and pistons for scoring (page 4-42). Replace
parts as necessary.
10. LOW ENGINE OIL PRESSURE.
Start engine and operate at idle speed for three minutes.
Tell assistant to listen for abnormal engine noises.
a. If abnormal engine noises are heard, go to Malfunction 5, page
b. If abnormal engine noises are not heard, go to step 2 below.
Step 2. Perform engine compression check (page 3-12).
a. If compression check readings are low, notify general support
maintenance to replace piston rings (page 4-42).
b. If compression check readings are normal, go to step 3 below.
Remove valve covers and rocker arm assemblies (page 3-60).
Disassemble rocker arm assemblies (page 3-65).
Using bore gage and micrometer, measure inside diameter of rocker
Inside diameter should be not more than 0.8755 inch.
a. Replace a rocker arm if inside diameter is more than 0.8755
inch. Reassemble (page 3-69) and install rocker arm assembly and
valve covers (page 3-71).
Be sure you reassemble rocker arm assemblies correctly as described on
page 3-69. Failure to do so will cause high oil consumption.
b. If rocker arms are okay, go to step 4 below.