NHTSA ID Number: 10227921
Manufacturer Communication Number: T-SB-0083-22 Rev
TSB/Document Date: 2022-12-19
Summary
TSB: Some 2022 model year Tacoma vehicles may exhibit a coolant leak, coolant dripping onto the ground, or high engine coolant temperature. The coolant leak may occur from the rear of the engine and drip down the transmission bell housing. Upon further inspection, coolant may be leaking from the union between the Rear Water By-Pass Joint and the No.1 Water Outlet Pipe (see Figure 1). Follow the Repair Procedure in this bulletin to address this condition.
T-SB-0083-22
Rev2
September 9, 2022
Coolant Leak From Rear of Engine - Water Outlet Pipe
Joint Misalignment
Service
Category
Engine/Hybrid
System
Section
Cooling
Market USA and Mexico
Applicability
YEAR(S)
MODEL(S)
2022
Tacoma
ADDITIONAL INFORMATION
REVISION NOTICE
November 18, 2022 Rev2:
The Production Change Information section has been updated.
October 03, 2022 Rev1:
The Parts Information and Repair Procedure sections have been updated.
Any previous printed versions of this bulletin should be discarded.
© 2022 Toyota Motor Sales, USA
Page 1 of 9
T-SB-0083-22
Rev2
September 9, 2022
Page 2 of 9
Coolant Leak From Rear of Engine - Water Outlet Pipe Joint Misalignment
Introduction
Some 2022 model year Tacoma vehicles may exhibit a coolant leak, coolant dripping onto the
ground, or high engine coolant temperature. The coolant leak may occur from the rear of the
engine and drip down the transmission bell housing. Upon further inspection, coolant may be
leaking from the union between the Rear Water By-Pass Joint and the No.1 Water Outlet Pipe
(see Figure 1). Follow the Repair Procedure in this bulletin to address this condition.
NOTE
This bulletin ONLY applies to Tacoma vehicles equipped with a 2GR-FKS engine.
Figure 1.
1
c
2
c
3
c
1
No. 1 Water Outlet Pipe
2
Rear Water By-pass
3
Leak Point
© 2022 Toyota Motor Sales, USA
T-SB-0083-22
Rev2
September 9, 2022
Page 3 of 9
Coolant Leak From Rear of Engine - Water Outlet Pipe Joint Misalignment
Table of Contents
Production Change Information ...............................................................................................4
Warranty Information ...............................................................................................................4
For USA Market .................................................................................................................4
For Mexico Market .............................................................................................................4
Parts Information .....................................................................................................................5
Required Tools & Equipment ...................................................................................................5
Repair Procedure ....................................................................................................................5
© 2022 Toyota Motor Sales, USA
T-SB-0083-22
Rev2
September 9, 2022
Page 4 of 9
Coolant Leak From Rear of Engine - Water Outlet Pipe Joint Misalignment
Production Change Information
This bulletin applies to vehicles produced BEFORE the Production Change Effective Engine Number
shown below.
MODEL
ENGINE
Tacoma
2GR-FKS
ENGINE PLANT
PRODUCTION CHANGE EFFECTIVE ENGINE NUMBER
TMMAL
P750596
TMMK
N566151
This Bulletin Applies ONLY to “P” and “N” Serial Engines
Warranty Information
For USA Market
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
EG1926
Recenter the Water Outlet Pipe
1.7
16332-0P010
64
57
APPLICABLE WARRANTY (USA)
This repair is covered under the Toyota Basic Warranty. This warranty is in effect for
36 months or 36,000 miles, whichever occurs first, from the vehicle’s in-service date.
Warranty application is limited to occurrence of the specified condition described in
this bulletin.
For Mexico Market
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
EG1926
Recenter the Water Outlet Pipe
1.7
16332-0P010
64
57
APPLICABLE WARRANTY (MEXICO)
This repair is covered under the Toyota Basic Warranty. This warranty is in effect for
36 months or 60,000 kilometers, whichever occurs first, from the vehicle’s in-service date.
Warranty application is limited to occurrence of the specified condition described in
this bulletin.
© 2022 Toyota Motor Sales, USA
T-SB-0083-22
Rev2
September 9, 2022
Page 5 of 9
Coolant Leak From Rear of Engine - Water Outlet Pipe Joint Misalignment
Parts Information
For USA and Mexico Markets
PART NUMBER
PART NAME
QTY
16332-0P010
Pipe, Water Outlet, No.1
*
16356-31051
Joint, Water By-pass, RR
*
96762-35030
Ring, O
*
17176-31130
Gasket, Air Surge Tank to Intake Manifold
1
17177-0P030
Gasket, Intake Manifold to Head, No.1
2
*These service parts are for reference ONLY. In most cases, parts replacement will not be necessary.
Required Tools & Equipment
REQUIRED TOOLS & MATERIAL
QUANTITY
Cooling System Pressure Tester
1
Repair Procedure
1. Confirm the condition exists.
Does the vehicle exhibit a coolant leak present between the Rear Water By-Pass Joint and the
No.1 Water Outlet Pipe (see Figure 1)?
HINT
If the cooling system is not pressurized, perform a pressure test and inspect the joint union for leaks.
YES — Continue to step 2.
NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
2. Remove the intake manifold.
Refer to TIS, applicable model and model year Repair Manual:
2022 Tacoma:
Engine/Hybrid System – Intake/Exhaust – “2GR-FKS (Intake): Intake
Manifold: Removal”
© 2022 Toyota Motor Sales, USA
T-SB-0083-22
Rev2
September 9, 2022
Page 6 of 9
Coolant Leak From Rear of Engine - Water Outlet Pipe Joint Misalignment
Repair Procedure (continued)
3. Rotate the intake manifold assembly upside
down, so the low-pressure injector nozzle
tips are facing up as shown. Then move the
assembly to the side of the engine bay.
Figure 2.
NOTICE
Use caution to avoid damage to the
injectors and intake assembly.
4. Remove the two bolts that hold the water
outlet tube assembly to the block.
Figure 3.
2
NOTE
1
A magnetic socket is useful when removing the
bolts to prevent them from being dropped.
3
1
Front
2
No. 1 (Front) Bolt
3
No. 2 (Rear) Bolt
© 2022 Toyota Motor Sales, USA
T-SB-0083-22
Rev2
September 9, 2022
Page 7 of 9
Coolant Leak From Rear of Engine - Water Outlet Pipe Joint Misalignment
Repair Procedure (continued)
5. Reposition the water outlet pipe for proper alignment to the water joints:
Using a large screwdriver or by hand, move the water outlet pipe assembly back and forth
(toward the bulkhead, then toward the front of the vehicle, and then again toward
the bulkhead).
NOTICE
Use caution to NOT damage the HP fuel pipe assembly or wire harness.
NOTE
This back-and-forth motion effectively allows the heater pipe to find its natural alignment to the
water joint openings and reseats the O-rings simultaneously.
The O-ring is NOT able to be inspected using this method. O-ring damage is not likely to occur as
a result of joint misalignment.
Figure 4.
1
1
2
1
Move Heater Pipe in Front/Rear Direction 3 – 4 times and Retighten
2
Outlet Pipe
© 2022 Toyota Motor Sales, USA
T-SB-0083-22
Rev2
September 9, 2022
Page 8 of 9
Coolant Leak From Rear of Engine - Water Outlet Pipe Joint Misalignment
Repair Procedure (continued)
6. Install the two outlet pipe bolts and torque
to specification (7 ft./lb.).
Figure 5.
2
HINT
1
Start with the No. 1 (front) bolt, and then
move to the No. 2 (rear) bolt.
3
7. With the intake still removed, perform a
cooling system pressure test, and confirm
no leaks are present at the front or rear
water joints.
1
Front
2
No. 1 (Front) Bolt
3
No. 2 (Rear) Bolt
Figure 6.
Is a coolant leak still present?
YES — The leak may be due to an issue
not related to outlet pipe
misalignment. This bulletin does
NOT apply. Continue diagnosis
using the applicable
Repair Manual.
NO — Continue to step 8.
© 2022 Toyota Motor Sales, USA
T-SB-0083-22
Rev2
September 9, 2022
Page 9 of 9
Coolant Leak From Rear of Engine - Water Outlet Pipe Joint Misalignment
Repair Procedure (continued)
8. Reassemble the remaining parts in reverse process.
Refer to TIS, applicable model and model year Repair Manual:
2022 Tacoma:
Engine/Hybrid System – Intake/Exhaust – “2GR-FKS (Intake): Intake
Manifold: Installation”
9. Confirm ALL bolts are torqued to specification and replace nonreusable parts.
10. Drive the vehicle to allow the engine to reach normal operating temperature.
11. Confirm NO leaks are present at operating temperature.
© 2022 Toyota Motor Sales, USA
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TSB/Document ID: T-SB-0083-22 Rev
Replacement Service Bulletin Number:
MFR Communication Date: 2022-11-18
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN
MFR Component System:
MFR Component Subsystem:
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