9 20-14

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9 20-14

SUBJECT

DATE

Additional Cleaning and Preparing

September 2014

Additions, Revisions, or Updates
Publication Number / Title

Platform

DDC-SVC-MAN-0080

DD Platform

DDC-SVC-MAN-0180
DDC-SVC-MAN-S180

Euro IV

Section Title

Change

Additional Cleaning and
Preparing

Changed gasket removal procedure

All information subject to change without notice.

9 20-14

Copyright © 2014 DETROIT DIESEL CORPORATION

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2 Additional Cleaning and Preparing

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Additional Cleaning and Preparing

Steam Cleaning
A steam cleaner is a necessary item in a large shop and is useful for removing heavy accumulations of grease and dirt from
the exterior of the engine and its subassemblies.
Solvent Tank Cleaning
Aluminum or plastic parts such as the flywheel housing, fuel pump drive, air intake manifold, oil filter adaptor, camshaft gear
access cover, oil pan or rocker covers, should not be cleaned in this manner.
A tank of sufficient size to accommodate the largest part that will require cleaning (usually the cylinder block) should be
provided and provisions made for heating the cleaning solution.
WARNING: PERSONAL INJURY
To avoid injury while performing the test or procedure, wear adequate eye, face protection, and
heat-resistant gloves.
Fill the tank with a commercial heavy-duty solvent, that is heated to 52°C (125°F). Lower large parts directly into the tank
with a hoist. Place small parts in a wire mesh basket and lower them into the tank. Immerse the parts long enough to loosen
all of the grease and dirt.
Rinsing Bath
Provide another tank of similar size containing hot water for rinsing the parts.
Drying
WARNING: EYE INJURY
To avoid injury from flying debris when using compressed air, wear adequate eye protection (face
shield or safety goggles) and do not exceed 276 kPa (40 psi) air pressure.
Parts may be dried with compressed air. In some cases the heat from the hot tanks will quite frequently complete drying of
the parts without the use of compressed air.
Rust Preventive
If parts are not to be used immediately after cleaning, dip them in a suitable rust preventive compound. The rust preventive
compound should be removed before installing the parts in an engine.
Gasket Removal
The gasket used on numerous mating surface joints results in a very thin film that must be removed from both surfaces prior
to reassembly. Detroit® recommends non-metallic scrapers for cleaning gasket surfaces. The use of abrasive pads or bristles
compromises the sealing surface integrity as well as creates grit that is known to cause internal engine damage.
Inspection
The purpose of parts inspection is to determine which parts can be used and which must be replaced. Although the engine
specifications given throughout the text will aid in determining which parts should be replaced, considerable judgment must
be exercised by the inspector. The guiding factors in determining the usability of worn parts, that are otherwise in good
condition, is the 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 maximum allowable until the next overhaul period, the reinstallation

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All information subject to change without notice.

Copyright © 2014 DETROIT DIESEL CORPORATION 9 20-14

9 20-14
of used parts may be justified. Rate of wear of a part is determined by dividing the amount the part has worn by the hours it
has operated.
Many service replacement parts are available in various undersize or oversize as well as standard sizes. Also, service kits for
reconditioning certain parts and service sets that include all of the parts necessary to complete a particular repair job are
available.
A complete discussion of the proper methods of precision measuring and inspection are outside the scope of this manual.
However, every shop should be equipped with standard gages, such as dial bore gages, dial indicators, and inside and outside
micrometers.
In addition to measuring the used parts after cleaning, the parts should be carefully inspected for cracks, scoring, chipping
and other detrimental conditions.

All information subject to change without notice.

9 20-14

Copyright © 2014 DETROIT DIESEL CORPORATION

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