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IO-390-D Series Engine Maintenance Manual
IO-390-D Series Engine Maintenance Manual
Component or Part
Piston
Small steel parts
Large steel parts covered
with light oil
Aluminum or magnesium
parts
Oil sump
Oil pump and oil pump
housing
Oil pressure screen
Oil suction screen
Oil cooler bypass valve
Spark plugs
Spark plug lead
connector, cable ends,
and ceramics
Lead deposits
Removal of gasket
material
© 2020 Avco Corporation. All Rights Reserved
March 2020
Table 1 (Cont.)
Cleaning Guidelines for Engine Components
Cleaning Agent*
Mineral spirits (MIL-PRF-
680), Safety Solvent or
equivalent degreasing
solvent
Mineral Spirits
Cold Dip Tanks (or closed
tank system) and use
NALCO 1704
Oil-based solvent: mineral
spirits or equivalent
Mineral spirits, MIL-PRF-
680 or equivalent
Mineral spirits, MIL-PRF-
680 or equivalent
degreasing solvent
Mineral spirits, MIL-PRF-
680 or equivalent
degreasing solvent
Commercially available
spark plug cleaner.
MEK
Acetone
Wood Alcohol
Naptha or equivalent
MEK
Acetone
Naptha or equivalent
Guidelines
Refer to the "Piston Cleaning" procedure
in this chapter.
Refer to the "Steel, Aluminum or
Magnesium Parts Cleaning" procedure in
this chapter.
Refer to the "Steel, Aluminum or
Magnesium Parts Cleaning" procedure in
this chapter.
Refer to the "Steel, Aluminum or
Magnesium Parts Cleaning" procedure in
this chapter.
Refer to Chapter 12-10 for additional
details.
CAUTION
DO NOT USE RAGS OR ANY LINT
CLOTH TO CLEAN THIS VALVE.
Soak the oil cooler bypass valve in
filtered mineral spirits.
Refer to the spark plug manufacturer's
cleaning instructions, regap spark plugs
after cleaning
Refer to the "Spark Plug Cleaning"
procedure in this chapter.
Refer to the "Lead Deposit Removal"
procedure in this chapter.
Apply solvent to gasket material
Use a wooden scraper to remove gasket
material.
Wipe away all debris with clean lint-free
wipe.
05-30
Page 35
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