Rust Preventive If parts are not to be used immediately
compound. The rust preventive compound should be
after cleaning, dip them in a suitable rust preventive
removed before installing the parts in an engine.
Many service replacement parts are available in various
The purpose of parts inspection is to determine which
undersize and/or oversize as well as standard sizes.
parts can be used and which must be replaced.
Also, service kits for reconditioning certain parts and
Although the engine overhaul specifications given
service sets which include all of the parts necessary to
throughout the text will aid in determining which parts
complete a particular repair job are available.
should be replaced, considerable judgment must be
exercised by the inspector.
A complete discussion of the proper methods of
precision measuring and inspection are outside the
The guiding factors in determining the usability of worn
scope of this manual. However, every shop should be
parts, which are otherwise in good condition, is the
equipped with standard gages, such as dial bore gages,
clearance between the mating parts and the rate of wear
on each of the parts. If it is determined that the rate of
wear will maintain the clearances within the specified
In addition to measuring the used parts after cleaning,
maximum allowable until the next overhaul period, the
the parts should be carefully inspected for cracks,
reinstallation of used parts may be justified. Rate of
scoring, chipping and other defects.
wear of a part is determined by dividing the amount the
part has worn by the hours it has operated.
When assembling an engine or any part thereof, refer to
Following cleaning and inspection, the engine should be
the table of torque specifications at the end of each
assembled using new parts as determined by the
chapter for proper bolt, nut and stud torques.
Use of the proper equipment and tools makes the job
To ensure a clean engine at time of rebuild, it is
progress faster and produces better results. Likewise, a
important that any plug, fitting or fastener (including
suitable working space with proper lighting must be
studs) that intersects with a through hole and comes in
provided. The time and money invested in providing the
contact with oil, fuel or coolant must have a sealer
proper tools, equipment and space will be repaid many
applied to the threads.
A number of universal sealers are commercially
available. It is recommended that Loctite J 26558-92
Keep the working space, the equipment, tools and
pipe sealer with teflon, or equivalent, be used.
engine assemblies and parts clean at all times. The
area where assembly operations take place should, if
possible, be located away from the disassembly and
NOTE: Certain plugs, fittings and fasteners
cleaning operation. Also, any machining operations
available from the Parts Depot already have a
should be removed as far as possible from the assembly
sealer applied to the threads. This pre-coating
will not be affected when the pipe sealer with
teflon is also applied.
Particular attention should be paid to storing of parts
and sub-assemblies, after removal and cleaning and
IMPORTANT: The sealer information above
prior to assembly, in such a place or manner as to keep
must not be confused with International
them clean. If there is any doubt as to the cleanliness of
Compound No. 2, which is a lubricant applied
such parts, they should be recleaned.
before tightening certain bolts.
International Compound No. 2 only where
specifically stated in the manual.