T-SB-0103-20
Service Bulletin Details
Public Details for: T-SB-0103-20
Tsb: this service bulletin provides updated non-electric water pump leak inspection and diagnostic tips for some 2008 ? 2021 model year toyota vehicles.
- 2021 - 2020 - 2019 - 2018 - 2017 - 2016 - 2015 - 2014 - 2013 - 2012 - 2011 - 2010 - 2009 - 2008 -
Models from 2021
Models from 2020
Models from 2019
2019 TOYOTA 4RUNNER |
2019 TOYOTA AVALON |
2019 TOYOTA C-HR |
2019 TOYOTA CAMRY |
2019 TOYOTA COROLLA |
2019 TOYOTA HIGHLANDER |
2019 TOYOTA LAND CRUISER |
2019 TOYOTA SEQUOIA |
2019 TOYOTA SIENNA |
2019 TOYOTA TUNDRA |
Models from 2018
2018 TOYOTA 4RUNNER |
2018 TOYOTA C-HR |
2018 TOYOTA CAMRY |
2018 TOYOTA COROLLA |
2018 TOYOTA HIGHLANDER |
2018 TOYOTA LAND CRUISER |
2018 TOYOTA SEQUOIA |
2018 TOYOTA SIENNA |
2018 TOYOTA TUNDRA |
Models from 2017
2017 TOYOTA 4RUNNER |
2017 TOYOTA COROLLA |
2017 TOYOTA HIGHLANDER |
2017 TOYOTA LAND CRUISER |
2017 TOYOTA SEQUOIA |
2017 TOYOTA SIENNA |
2017 TOYOTA TUNDRA |
Models from 2016
2016 TOYOTA 4RUNNER |
2016 TOYOTA COROLLA |
2016 TOYOTA LAND CRUISER |
2016 TOYOTA SEQUOIA |
2016 TOYOTA TUNDRA |
Models from 2015
2015 TOYOTA 4RUNNER |
2015 TOYOTA COROLLA |
2015 TOYOTA LAND CRUISER |
2015 TOYOTA SEQUOIA |
2015 TOYOTA TUNDRA |
Models from 2014
2014 TOYOTA 4RUNNER |
2014 TOYOTA COROLLA |
2014 TOYOTA LAND CRUISER |
2014 TOYOTA SEQUOIA |
2014 TOYOTA TUNDRA |
Models from 2013
2013 TOYOTA 4RUNNER |
2013 TOYOTA COROLLA |
2013 TOYOTA LAND CRUISER |
2013 TOYOTA SEQUOIA |
2013 TOYOTA TUNDRA |
Models from 2011
2011 TOYOTA 4RUNNER |
2011 TOYOTA COROLLA |
2011 TOYOTA LAND CRUISER |
2011 TOYOTA SEQUOIA |
2011 TOYOTA TUNDRA |
Models from 2010
2010 TOYOTA 4RUNNER |
2010 TOYOTA COROLLA |
2010 TOYOTA LAND CRUISER |
2010 TOYOTA SEQUOIA |
2010 TOYOTA TUNDRA |
Models from 2008
2008 TOYOTA LAND CRUISER |
2008 TOYOTA SEQUOIA |
T-SB-0103-20 October 16, 2020 Water Pump Leak Inspection and Diagnostic Tips Service Category Engine/Hybrid System Section Cooling Market USA Applicability YEAR(S) MODEL(S) 2010 - 2021 4Runner, Tundra 2019 - 2021 Avalon 2018 - 2021 C-HR, Camry, Hilux 2009 - 2021 Corolla 2020 - 2021 Hiace 2017 - 2021 Highlander ADDITIONAL INFORMATION 2008 - 2011, 2013 - 2021 Land Cruiser 2008 - 2021 Sequoia 2017 - 2020 Sienna 2010 - 2021 Tundra Introduction This Service Bulletin provides updated non-electric water pump leak inspection and diagnostic tips for some 2008 – 2021 model year Toyota vehicles. © 2020 Toyota Motor Sales, USA Page 1 of 8 T-SB-0103-20 October 16, 2020 Page 2 of 8 Water Pump Leak Inspection and Diagnostic Tips Warranty Information OP CODE DESCRIPTION TIME OFP T1 T2 N/A Not Applicable to Warranty – – – – APPLICABLE WARRANTY Warranty coverage is based on the failed component. Please refer to the Warranty Policy and Procedures Manual and the Powertrain Parts List for specific coverage. Warranty application is limited to occurrence of the specified condition described in this bulletin. Warranty and Claim Submission: Warranty Policy 4.21. ANY leak repair to be performed under warranty requires photo documentation of the active leak. This documentation showing the cause of the defect MUST be created prior to the start of the repair and attached to the warranty claim. Photos MUST be clear and provide perspective image(s) that identify the vehicle identification number (VIN) and the affected component(s), and close-up image(s) that illustrate the defect or condition. For additional information regarding application and eligibility, please reference Warranty Policy 4.21. Procedures Water Pump Construction ........................................................................................................ 3 Evaporation Port and Drain Plug ........................................................................................ 3 Mechanical Seal ................................................................................................................ 4 Temporary and Active Leaks ................................................................................................... 5 Water Pump Replacement ....................................................................................................... 7 Diagnostic Procedure......................................................................................................... 7 © 2020 Toyota Motor Sales, USA T-SB-0103-20 October 16, 2020 Water Pump Leak Inspection and Diagnostic Tips Water Pump Construction Evaporation Port and Drain Plug Figure 1. Typical Pump Assembly 1 2 3 4 1 Evaporation Port 3 Drain Pocket 2 Mechanical Seal 4 Drain Plug © 2020 Toyota Motor Sales, USA Page 3 of 8 T-SB-0103-20 October 16, 2020 Page 4 of 8 Water Pump Leak Inspection and Diagnostic Tips Water Pump Construction (continued) Mechanical Seal The water pump shaft is sealed by a mechanical type seal. Figure 2. Mechanical Seal 1 2 3 4 5 1 Spring – Applies Pressure to The Seal Ring To Ensure The Seal Ring And Mating Ring are in Constant Contact 4 Cartridge – Locates the Seal Ring and Bellows in the Water Pump Housing 2 Seal Ring – Stationary Sealing Member in the Water Pump Housing, Held in Place by the Cartridge 5 Bellows – Seals the Cartridge and the Seal Ring 3 Mating Ring – Rotates With the Water Pump Shaft and Provides a Sealing Surface for the Seal Ring © 2020 Toyota Motor Sales, USA T-SB-0103-20 October 16, 2020 Page 5 of 8 Water Pump Leak Inspection and Diagnostic Tips Temporary and Active Leaks Water pump replacement is NOT necessary for a temporary leak condition. The water pump should be replaced for an active leak condition. Examples of both conditions are shown below: As the water pump assembly rotates, a small amount of engine coolant is discharged to cool and lubricate the sliding surface of the mechanical seal and evaporates. Figure 3. Temporary Leak – Dry Coolant Residue (Do Not Replace the Water Pump) Figure 4. Active Leak Leak – Wet Coolant Residue/Drips (Replace the Water Pump) © 2020 Toyota Motor Sales, USA T-SB-0103-20 October 16, 2020 Page 6 of 8 Water Pump Leak Inspection and Diagnostic Tips Temporary and Active Leaks (continued) If debris becomes lodged between the mating ring and seal ring, a small gap is formed. This allows coolant to bypass the mechanical seal, flow into the fluid catch pocket, and drain out of the weep hole. This condition is temporary and will no longer be present once the debris breaks up or works its way out of the seal. Figure 5. Debris in Mechanical Seal 3 A 2 1 4 B 5 C 1 Mating Ring 2 Seal Ring 3 Spring 4 Cartridge 5 Bellows A Housing Side B Impeller Side C Gap Formed by Debris © 2020 Toyota Motor Sales, USA T-SB-0103-20 October 16, 2020 Page 7 of 8 Water Pump Leak Inspection and Diagnostic Tips Water Pump Replacement Diagnostic Procedure 1. Confirm if there are leaks from other areas of the cooling system not including from the water pump assembly. NOTE Refer to the applicable model and model year Repair Manual at TIS – Cooling System – OnVehicle Inspection – Inspect for Coolant Leak. Are ANY leaks present in the cooling system other than from the water pump? YES — Continue leak diagnosis using the applicable model and model year Repair Manual and correct any other cooling system leaks BEFORE proceeding. NO — Continue to step 2. 2. Is the coolant level below the “low” indicator on the reservoir and does the water pump appear to be actively leaking? YES — Replace the water pump. Refer to the applicable model and model year Repair Manual. NO — Continue to step 3. 3. Does the water pump pulley/bearing have excessive free play or does NOT turn smoothly? YES — Replace the water pump. Refer to the applicable model and model year Repair Manual. NO — Continue to step 4. © 2020 Toyota Motor Sales, USA T-SB-0103-20 October 16, 2020 Page 8 of 8 Water Pump Leak Inspection and Diagnostic Tips Water Pump Replacement (continued) Diagnostic Procedure (continued) 4. A paper towel should be used to determine if a leak is current or was temporary due to debris that has now cleared. Apply a dry paper towel to the coolant deposits around the water pump. If the paper towel remains dry, the leak was temporary and the water pump does NOT need to be replaced. If the paper towel becomes wet with coolant, the leak is active and the water pump should be replaced. Figure 6. 1 A 2 A Apply a Dry Paper Towel to the Coolant Deposits 2 Wet Paper Towel 1 Dry Paper Towel Is the paper towel wet with coolant? YES — Replace the water pump. Refer to the applicable model and model year Repair Manual. NO — No active leak is present. Confirm the coolant level in the reservoir is correct, adjust as necessary, and return the vehicle to the customer. NOTE Thoroughly clean ANY coolant residue from the engine and surrounding areas. © 2020 Toyota Motor Sales, USA