Lycoming IO-390-D Series Maintenance Manual page 60

Component or Part
Crankshaft
Crankshaft Counterbore
Crankshaft Gear
Camshaft
Tappets
Crankcase
Removal of silk thread
and/or gasket material
from crankcase mating
flanges
Accessory Housing
Cylinders
Deposits in cylinder
combustion chamber
Connecting Rods
Interior surfaces of
aluminum parts with hard
carbon or oil varnish
(gum) deposits
Valve rockers
Stabilizers, valve
components, starter drive,
fuel control inlet screen
05-30
Page 34
Table 1
Cleaning Guidelines for Engine Components
Cleaning Agent*
Mineral spirits, MIL-PRF-
680 or equivalent
Mineral spirits, MIL-PRF-
680 or equivalent or
Stoddard Solvent or
equivalent
Mineral spirits, MIL-PRF-
680 or equivalent or
Stoddard Solvent or
equivalent
Mineral spirits, MIL-PRF-
680 or equivalent
Petroleum-based solvent
Petroleum-based solvent
Methyl-Ethyl-Ketone
(MEK)
Acetone
Napsco SC-200
M-17
M-114
Mineral spirits (MIL-PRF-
680), kerosene or equivalent
degreasing solvent
Mineral spirits, MIL-PRF-
680 or equivalent
Petroleum-based
decarbonizing solutions
® ®
(Gunk , Penetrol , or
equivalent)
Mineral spirits (MIL-PRF-
680), kerosene or equivalent
degreasing agent
Mineral spirits (MIL-PRF-
680), kerosene or equivalent
degreasing agent
IO-390-D Series Engine Maintenance Manual
IO-390-D Series Engine Maintenance Manual
Guidelines
Refer to the "Crankshaft Cleaning"
procedure in this chapter
Refer to the "Crankshaft Counterbore
Cleaning" procedure in this chapter
Refer to the "Crankshaft Gear Cleaning"
procedure in this chapter.
Refer to the "Tappet Cleaning"
procedure in this chapter.
Refer to the "Crankcase Cleaning"
procedure in this chapter.
Refer to the "Soft Carbon Removal"
procedure in this chapter
Refer to the "Cylinder Cleaning"
procedure in this chapter.
Refer to the "Grit-Blasting the
Combustion Chamber in an Engine
Cylinder" procedure in this chapter.
Refer to the "Hard Carbon Removal"
procedure in this chapter.
Clean with Scotch-Brite
Remove debris with clean lint-free wipes.
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™
or equivalent.
March 2020