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SUBJECT
DATE
Oil in Coolant
January 2016
Additions, Revisions, or Updates
Publication Number / Title
DDC-SVC-MAN-0084
Platform
Section Title
Change
DDPlatform
Oil in Coolant
Updated Oil in Coolant diagnostic procedures
All information subject to change without notice.
01 25-16 Copyright © 2016 DETROIT DIESEL CORPORATION
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2 Oil in Coolant
2
Oil in Coolant
1. Verify that the contaminant in the coolant is oil. Combustion gas can darken the coolant appearance as well and
misdiagnose the issue.
2. Pressurize the transmission cooler, per Original Equipment Manufacturer (OEM) specifications. Inspect for leaks. Are
any leaks present?
a. Yes; repair as necessary. Flush the cooling system prior to replacing any parts. Refer to section "Extended Life
Coolant Additive Maintenance Procedures", and see "Drain, Flush, and Refill Procedure". Go to step 7.
b. No; Go to step 3.
WARNING: PERSONAL INJURY
To avoid injury, never remove any engine component while the engine is running.
3. Remove the oil coolant module. Refer to section "Removal of the Oil Coolant Module".
4. Remove the oil cooler, paying close attention to the seal rings. Refer to section "Removal of the Oil Cooler ".
WARNING: PRESSURIZED AIR AND FLYING PARTICLES
To avoid injury to eye or face, wear a face shield or goggles when conducting a pressure test.
5. Pressure test the oil cooler. Refer to section "Inspection and Pressure Testing of the Oil Cooler". Are any leaks present?
a. Yes; repair as necessary. Flush the cooling system prior to replacing any parts. Refer to section "Extended Life
Coolant Additive Maintenance Procedures", and see "Drain, Flush, and Refill Procedure". Go to step 7.
b. No; Go to step 6.
6. Inspect the cylinder head gasket for leaks.
For DD13, Refer to section "Removal of the DD13 Cylinder Head Assembly".
For DD15 and DD16, Refer to section "Removal of the DD15 and DD16 Cylinder Head Assembly". Are leaks present?
a. Yes; repair as necessary. Flush the cooling system prior to replacing any parts. Refer to section "Extended Life
Coolant Additive Maintenance Procedures", and see "Drain, Flush, and Refill Procedure". Go to step 7.
b. No; verify that the contaminant in the coolant is oil. Combustion gas can darken the coolant appearance as well.
Question the driver about oil consumption. Contact the Detroit ™ Customer Support Center (CSC).
7. If oil has been identified as a contaminant in the coolant, flush the cooling system prior to replacing any parts. Refer to
section "Extended Life Coolant Additive Maintenance Procedures", and see "Drain, Flush, and Refill Procedure". See
Table 1 for a list of parts to be replaced.
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All information subject to change without notice.
Copyright © 2016 DETROIT DIESEL CORPORATION 01 25-16
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Table 1.
Table 1 - Parts List
Description
Qty.
Comments
Seal between Coolant Collector and
Cylinder Head
2
Only for DD15/16 engine S/N (last five
digits) 32840 built before March 22, 2010.
Do not replace for DD13 engines.
Coolant Line - Air Compressor To Fuel
Filter Module
1
Coolant Line - Fuel Filter Module To Oil/
Coolant Module
1
Coolant Line - Air Compressor To Cylinder
Block
1
Gasket - Fuel Injector Jumper Lines
6
Fuel Injector O-Ring Seal Kit
6
Coolant Filter
1
Discard the coolant filter. Customers may
choose to eliminate the use of the coolant
filters,
refer to 15TS-10REV (http://ddcsnddc.freightliner.com/cps/rde/xbcr/ddcsn/
15TS10Rev.pdf)
Note some engines do not have a coolant
filter.
Coolant
N/A
Use applicable coolant as listed in the
"Coolant Selections" manual (DDC-SVCBRO-0002).
All information subject to change without notice.
01 25-16 Copyright © 2016 DETROIT DIESEL CORPORATION
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