NHTSA ID Number: 10164378
Manufacturer Communication Number: 42-056
TSB/Document Date: 2019-09-05
Summary
Fix-As-Fail -+?+? Composite fittings used in the cooling system may crack, resulting in coolant leaks. Brass fittings are available to replace the composite fittings.
TIB 42-056: Composite Coolant Fitting Leak
Page 1 of 3
Technical Information Bulletin
42-056
Section
Cooling - 42
Subject
Composite Coolant Fitting Leak
Release Date
8/28/2019
Condition
Coolant leak at composite coolant fitting.
Chassis Affected
T600 Service Cabs only, and C500, T660, T800, W900, T680, T880, and W990 vehicles and associated service cabs built from
05/04/2015 (PACCAR
engines) 10/10/2016 (Cummins engines) through 05/20/2019 (PACCAR MX-13) 08/26/2019 (PACCAR MX-11
and Cummins X15) equipped with PACCAR MX-11 or MX-13, or Cummins X15 engines and composite coolant fittings.
Action
Fix-As-Fail
If a customer comes into you dealership and demonstrates the condition above, use the attached part conversion table and WebECAT
to determine the correct parts, and replace all the composite coolant fittings with the applicable fittings and hoses as shown in the
attached cross-reference documents.
Warranty
https://eportal.paccar.com/dealer/uskw/en/service/vehiclebulletins/vehiclefieldservice/Pages... 9/3/2019
TIB 42-056: Composite Coolant Fitting Leak
Page 2 of 3
Through Standard Warranty (includes Extended Warranty) Kenworth will pay for parts at dealer net plus applicable mark-up and labor:
0.9 hours labor to replace all the composite fittings, leaking or not, with brass and refill the cooling system. File a long form
claim.
Take-Off Parts Disposition: Destroy take-off parts 30 days after claim is paid
CLAIM CODING
Failure Location:
042-004-017
Work Accomplished:
Failure Type:
155
Responsibility Code:
SRT Code:
B42-056
Claim Type:
0.9 hrs.
Replace coolant
fittings. Includes
time to drain and
fill cooling system.
35
01
N/E
Parts
Parts are available from PACCAR Parts.
Use WebECAT, in conjunction with the appropriate attached parts cross-reference documents, to determine the necessary parts
required for this repair.
Quantity
Part Number
As Required EC3501
As Required EC7501
Description
U.S. Coolant
Canada Coolant
Hose Cross-Reference, ALL YEARS
Description
Current
Replacement
Formed hose
V50-1523
v50-6129
Formed hose
V50-1521
V50-6132
Formed hose
V50-1524
V50-6134
Formed hose
V50-1522
V50-6133
Formed hose
V50-1519
V50-6130
Formed hose
V50-1520
V50-6131
bulk hose 3/4 in.
K342-525-000
D1030-3755
bulk hose 5/8 in.
F50-1016-5-0000
D1030-3625
bulk hose 3/4 in.
F50-6178-00000
D1030-3755
bulk hose 3/4 in.
V50-6008-2XXXX
D1030-3755
Procedure
1.
2.
3.
4.
5.
Use the attached parts cross-reference and Web ECAT to determine the required replacement fittings and hoses.
Drain the coolant into a clean container so as much as possible can be reused at the end of the repair.
Remove the coolant hoses from the composite fittings that will be replaced, then remove the composite fittings.
Install the new coolant fittings and the new hoses.
Refill with coolant removed during Step 3. Top off with new coolant as necessary. Refer to the Coolant Fill procedure in the
Attachments section.
Print this document and provide it to the customer. This is a revised procedure as compared to the procedures provided
in the Operator Manuals.
Attachments
EPA2017 and later MX-11 Engine Brass Coolant Fittings
Pre-EPA2017 MX-11 Engine Brass Coolant Fittings
https://eportal.paccar.com/dealer/uskw/en/service/vehiclebulletins/vehiclefieldservice/Pages... 9/3/2019
TIB 42-056: Composite Coolant Fitting Leak
Page 3 of 3
EPA2017 and later MX-13 Engine Brass Coolant Fittings
Pre-EPA2017 MX-13 Engine Brass Coolant Fittings
EPA 2013-2017 X15 Engine Brass Coolant Fittings
Parts cross-reference
Coolant Fill Procedure
Authored by: OF
Access to PACCAR’s Enterprise Portal is provided as a benefit of doing business with PACCAR. All applications and content accessed
through this system are confidential and proprietary and the property of PACCAR Inc and its suppliers, and must be kept strictly
confidential pursuant to the contract licensing such access. Disclosure, publication, release or distribution of any material found on
PACCAR systems to any person other than employees with a need to know such information is strictly prohibited. All activity on this
system is monitored. If PACCAR suspects or discovers any unauthorized activity, access may be immediately terminated without
prior notification. Violators may be subject to legal action.
© Copyright 2019 PACCAR Inc. All rights reserved. We welcome your feedback on this page. For technical questions or concerns
about this page, please contact the DealerNet Webmaster.
https://eportal.paccar.com/dealer/uskw/en/service/vehiclebulletins/vehiclefieldservice/Pages... 9/3/2019
EPA 2013 and Higher Cummins X15 Engine
Port A (Cab heater)
Brass
Variation
Composite
KW 2.1m
V38-1166 & V88-1123V38-1089
w/ cab htr - A01
645080090
KW 1.9m
V38-1166 & V88-1123V38-1018
w/ cab htr - A02
500165000
Port E (AD heater/2nd DT cooler)
Brass
Variation
Composite
KW 2.1m w/ 1 AD htr or 2nd
DT cooler
D2111-3603
V38-1166 & V88-1135-500
KW 1.9m w/ 1 AD htr w/o inV88-1109
cab htr - E01
KW 1.9m w/ 1 AD htr & w/ inV38-1166 & V88-1123D2111-3603 & F88-1050
cab htr - E02
545080090
KW 1.9m
D2111-3602
V38-1166 & V88-1135-600
2nd DT cooler - E03
V88-1167
Port G (Drivetrain cooler or Aux heater)
Brass
Variation
Composite
All cabs
V38-1166 & V88-1138
V38-6042
1st DT cooler - G01
KW 1.9m
V38-1166 & V88-1123V38-1088
3rd AD htr - G02
560110095
2.1m Cabs
T680, T880,
W990
Cab Definition
1.9m Cabs
T600 Service cab, C500, T660,
T800, W900
Updated Installation Drawing
V97-1184
No Composite Version
No Composite Version
Port A, Option 1
• 2.1m Cab Heater
• Brass: V38-1089
• Composite: V38-1166 and V88-1123-6*
Port A, Option 2
• 1.9m Cab Heater
• Brass: V38-1018
• Composite: V38-1166 and V88-1123-5*
Port E, Option 1
• 2.1m Aux Heater or 2nd
Drivetrain Cooler
• OR 1.9m Aux Heater
• Brass: D2111-3603 & V88-1109
• Composite: V38-1166 and V881123-5*
Port E, Option 3
• 1.9m w/ 1 AD heater & w incab heater
• Brass: D2111-3603 & F881050
• Composite: V38-1166 & V881123-5*
Port E, Option 3
• 1.9m 2nd Drivetrain Cooler
• Brass: D2111-3602 & V88-1167
• Composite: V38-1166 and V881135-600
Port G, Option 1
• 1st Drivetrain Cooler
• Brass: V38-6042
• Composite: V38-1166 and V881138
Port G, Option 2
• 1.9m w/ 3rd Aux Heater
• Brass: V38-1088
• Composite: V38-1166 and V88-11235*
EPA2017 and Later PACCAR MX-11 Engine
Variations
KW 2.1m
V97-1176-X11
DEF coolant & slpr
heater
KW 1.9m
V97-1176-X22
DEF coolant & slpr
heater
KW (All)
DEF only
Variations
KW 2.1m
V97-1176-X11
cab heater
KW 1.9m
V97-1176-X22
cab heater
Port R (DEF/Sleeper)
Composite
Brass
V88-1145 & V38-1166
V38-6040 & D2034-6707
V88-1144 & V38-1166
V38-6040 & V38-1018
V38-1166 & V88-1143
V38-6041
Port P (Cab heater)
Composite
Brass
V88-1123-645080090 &
V38-1166
D2111-3602 &
V88-1107 (3/4 in.)
V88-1123-590100110 & V38-1166
D2111-3603 & V88-1028
Cab Definition
2.1m Cabs
1.9m Cabs
T680, T880, W990
T600 Service cab & C500,
T660, T800, W900
Updated Installation Drawing
V97-1185
Port P
2.1m
1.9m
Port R
2.1m
1.9m
2.1m with Sleeper
Port R
DEF Coolant & Sleeper
• Brass: V38-6040 & D2034-6707
• Composite: V38-1166 & V88-1145
DEF Only
• Brass: V38-6041
• Composite: V38-1166 & V88-1143
Port P
Cab Heater
• Brass: V88-1107 (3/4 in.) & D2111-3602
• Composite: V88-1123-6* & V38-1166
1.9m with Sleeper
Port R
DEF Coolant & Sleeper
• Brass: V38-6040 & V38-1018
• Composite: V38-1166 & V88-1144
DEF Only
• Brass: V38-6041
• Composite: V38-1166 & V88-1143
Port P
Cab Heater
• Brass: V88-1028 & D2111-3603
• Composite: V88-1123-5* & V38-1166
EPA2017 and Later PACCAR MX-13 Engine
Port P (DEF/Sleeper)
Variations
Composite
Cab Definition
Brass
KW 2.1m
V97-1174-X11
V88-1141 & V38-1166
DEF coolant & slpr heater
V38-6040 & V381089
KW 1.9m
V97-1174-X22
V88-1142 & V38-1166
DEF coolant & slpr heater
V38-6040 & V381018
KW All
DEF only
V88-1143 & V38-1166
2.1m Cabs
T680, T880, W990
1.9m Cabs
T600 Service cab, C500, T660, T800,
W900
Updated Installation Drawing
V38-6041
Port R (Cab heater)
Variations
Composite
Brass
KW 2.1m
V97-1174-X11
cab heater
V88-1123-600165000
& V38-1166
V38-1089
KW 1.9m
V97-1174-X22
cab heater
V88-1123-500165000
& V38-1166
V38-1018
V97-1186
Port P
Port R
2.1m with DEF coolant & Sleeper
Port P
• Brass: V38-1089 & V38-6040
• Composite: V38-1166 & V88-1141
Port R
• Brass: V38-1089
• Composite: V38-1166 & V88-11236*
1.9m with DEF coolant & Sleeper
Port P
• Brass: V38-1018 & V38-6040
• Composite: V38-1166 & V88-1142
Port R
• Brass: V38-1018
• Composite: V38-1166 &
• V88-1123-5*
All Trucks w/ DEF coolant only
Port P
• Brass: V38-6041
• Composite: V38-1166 and V881143
Port R
• See Images to the Left for 2.1m
or 1.9m
EPA2017 AND NEWER ENGINES
MX-13
Variations
Port P (DEF/Slpr)
Nylon (with V381166)
- Unsurpassed freeze protection and anti-boil performance...
- Organic acid technology resists rust, scale & corrosion...
- High-quality additives protect against leaks and won’t...
- Pre-mixed orange formula is ready-to-use in a 50/50 ratio...
- 5 year/150,000 mile guarantee protects against engine...
- Formulated to replace the OEM fluid in Asian make vehicles...
- 5 year/150, 000 mile . Silicate-free, long-life, phosphate...
- The long life formula provides protection for all cooling...
- Meets the following OEM and industry specifications: JIS K...
- Note: Please check the vehicle specification before...
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: 42-056
Replacement Service Bulletin Number:
MFR Communication Date: 2019-08-28
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- [Notice] When you receive a used device, it may be a customer return resold by Amazon without inspection. You can exchange it for a new one through Amazon. As this situation is unavoidable, we sincerely apologize. For any issues, contacting us via Amazon's "Messages" is the best way. THINKSCAN 689BT Bidirectional Scan Tool Can Be Used Immediately After It is Turned On, Without Complicated Registration Process, Which is More Convenient & Quick.
- Full Bi-Directional Control & 3000+ Active Tests: Take control and test components like actuators, fuel injectors, relays, and cooling fans in real time. You’ll quickly see if the problem is in the part itself or the control module — saving you hours of guesswork and frustrating trial-and-error.
- Advanced ECU Coding Capabilities: Handle module matching and hidden feature activation with confidence. When you replace an ECU or want to customize settings, this obd2 scanner diagnostic bi directional tool gives you the professional-level capabilities you need without the dealership price tag.
- 34+ Useful Reset and Maintenance Functions: Complete everyday service tasks smoothly with a wide range of helpful reset and maintenance functions. Whether you’re keeping up with regular upkeep or tackling a specific job, this scanner makes maintenance simpler and less stressful for both DIYers and pros.
- Comprehensive Full System Diagnostics: Diagnose every major system — Engine, Transmission, ABS, SRS, TPMS, and more — all in one place. Finally stop wondering if you’re missing something important; get the full picture and clear codes with ease.
- Top Reasons to Choose the D7S OBD2 Scanner: XTOOL D7S car scan tool, an upgrade of XTOOL D7, offers comprehensive features for automotive technicians, workshops, and DIY enthusiasts 1. Upgraded Hardware: 2+64GB memory, rear camera, intuitive interface, foldable bracket 2. Complete Diagnostics: FCA
Autoauth, OE-level all system scan, 39+ maintenance services, 4K+ bidirectional, CANFD/DoIP protocol 3. Advanced Capabilities: ECU c0ding, PMI functions 4. Wide Compatibility: Support 10,000+ models, covering 99% vehicle brands 5. Multi-language: Available in 22+ languages, No IP Restrictions 6. 3-Year Updates: Save 300 bucks on software updates for the latest features and optimizations - 2026 Upgraded D7S Car Scanner Features: The newly 2026 D7S V2.0 scanner for car brings exciting features for advanced vehicle diagnostics and enhanced user experience 1. FCA AutoAuth: Now supports FCA SGW module for Chrysler, for Jeep, for Dodge (2018+), for Fiat (2017+), enabling faster vehicle communication without gateway restrictions 2. PMI (Offline ECU Pr0gramming): Allows for Ford, for Lincoln, and for Mazda ECU pr0gramming for new modules 3. Optimized Diagnostic Report 2.0: Personalized reports with logos and customer info for auto shops. Note: Compatibility varies by cars, please check before order
- 39+ Services/Resets/Adaptations/Relearns/Calibrations: XTOOL D7S full system car scanner diagnostic tool tackles 99% of common car issues through its 36+ special functions, including Oil Reset, EPB, SAS, BMS, Throttle Reset, Injector C0ding, ABS Bleed, TPMS Reset, Power Balance, etc and also covers specific-vehicle functions like Crank Sensor Relearn, ABS Initialization, Cylinder Power Balance, Fuel Trim Reset, Idle Relearn etc. This car diagnostic scanner enhances efficiency, making repairs and maintenance hassle-free. Tip: DO NOT for All vehicles, please check compatibility first
- Cost-effective ECU C0ding Scan Tool for Specific Brands: Enhance your vehicle's performance with XTOOL D7S! This obd2 scanner all systems bidirectional offers advanced capabilities at an affordable price, supports online for BMW, for Benz and offline for BENZ, for MIT, along with PMI functions for Ford, for Mazda, and for Lincoln. Ideal for technicians and DIY enthusiasts, this automotive scanner diagnostic tool optimizes vehicle performance and enhances the driving experience. Note: Not for all cars and modules, please send car VIN to check the compatibility before purchase
- OE All System Diagnostic & 8 Pids Graphing: XTOOL D7S is a comprehensive all system bi directional obd2 scanner that delivers dealer-level diagnostics, completely controlling over your vehicle’s performance and health. This automotive scan tool can read and clear DTCs, view live data and ECU information, retrieve freeze frames, and perform active tests and full obd2 functions. This bi-directional scan tool can can identify your vehicle's make, model, and year information with just one click and show up to 8 PIDs live data with options for CSV viewing, playback, and recording for in-depth analysis. It is easy-to-use for both professionals and beginners, helping pinpoint issues efficiently
- 【✅Compared to BOSSCOMM IF742, IF745 Offers Full-System Diagnostics】The BOSSCOMM IF745 car diagnostic scanner is an upgraded model of IF742. In addition to supporting all OBD2 Code Reader functions and 6 reset options (ABS/EPB/SAS/BMS/Oil/Throttle), it expands diagnostics from 4 systems (Check Engine/ABS/SRS/Transmission) to vehicle All systems, including Steering, Suspension, and Body Electronics. This provides deeper, more comprehensive diagnostic capabilities.
- 【✨10 OBD2 Functions】The BOSSCOMM IF745 scan tool’s DTC Lookup instantly translates fault codes into user-friendly explanations, its I/M Readiness feature streamlines emissions testing with a single tap, and Freeze Frame lets you pinpoint the exact moment of a fault for in-depth root-cause diagnosis. Combined with a live data dashboard and advanced diagnostics (O2S, OBMon, EVAP), it delivers comprehensive insights for confident troubleshooting.
- 【✨Deep Diagnostics for All Vehicle System Modules】Beyond code reading/clearing and ECU information retrieval, our all-in-one data stream feature lets you inspect all current fault codes and their locations across the vehicle’s systems. This vehicle code reader helps you turn off dashboard warning lights and perform a comprehensive self-check of your car at home—no more back-and-forth trips to the repair shop or hefty inspection fees.
- 【✨6 Essential Resets: ABS Bleeding, Oil, EPB, SAS, Throttle, BMS】The BOSSCOMM IF745 obd2 scanner diagnostic tool swiftly purges air from brake lines to restore braking sensitivity, fine-tunes maintenance cycles to eliminate false alerts, resolves parking brake issues with one-click control, recalibrates steering sensors for stability, optimizes engine idling/acceleration for smoother performance, and deeply resets battery systems to extend lifespan and range via precise parameter adjustments.❗NOTE: Does NOT support bidirectional control, coding, or programming.
- 【✨10,000+ Car Models, AutoVIN, 13 Languages】The BOSSCOMM IF745 vehicle scanner diagnostic tool covers 73+ global car brands and offers support in 13 languages, making it perfect for DIYers, auto mechanics, or as a thoughtful gift. With a single-click AutoVIN feature, it instantly retrieves vehicle serial numbers, streamlining diagnostics for users globally. This adaptable tool balances user-friendliness with precision, catering to both personal and professional requirements.✅Unsure about compatibility? Compatibility will vary on vehicles' model and year, pls reach us via 📧 [email protected] 📧 before purchase.
This product presentation was made with AAWP plugin.