G16E-GTS (COOLING): THERMOSTAT: REMOVAL; 2023 - 2025 MY GR Corolla [11/2022

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM1000000028GQI
Model Year Start: 2023	Model: GR Corolla	Prod Date Range: [11/2022 - ]
Title: G16E-GTS (COOLING): THERMOSTAT: REMOVAL; 2023 - 2025 MY GR Corolla [11/2022 - ]

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during water inlet with thermostat sub-assembly removal/installation are shown below.

Necessary Procedures After Parts Removed/Installed/Replaced

Replaced Part or Performed Procedure	Necessary Procedure	Effect/Inoperative Function when Necessary Procedure not Performed	Link
Replacement of throttle body with motor assembly Cleaning the deposits from the throttle body with motor assembly	Inspection After Repair	Poor idle, etc. Engine start function, etc.

NOTICE:

This procedure includes the removal of small-head bolts. Refer to Small-Head Bolts of Basic Repair Hint to identify the small-head bolts.

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HINT:

When the cable is disconnected / reconnected to the battery terminal, systems temporarily stop operating. However, each system has a function that completes learning the first time the system is used.

Learning completes when vehicle is driven

Effect/Inoperative Function when Necessary Procedure not Performed	Necessary Procedure	Link
1: for GR Model 2: except GR Model
Front Camera System	Drive the vehicle straight ahead at 35 km/h (22 mph) or more for 5 seconds or more.1 Drive the vehicle straight ahead at 15 km/h (10 mph) or more for 1 second or more.2

Learning completes when vehicle is operated normally

Effect/Inoperative Function when Necessary Procedure not Performed	Necessary Procedure	Link
Power Door Lock Control System Back door opener	Perform door unlock operation with door control switch or electrical key transmitter sub-assembly switch.

PROCEDURE

1. REMOVE NO. 1 ENGINE UNDER COVER ASSEMBLY

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2. DRAIN ENGINE COOLANT

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3. REMOVE INTAKE MANIFOLD

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4. REMOVE GENERATOR ASSEMBLY

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5. DISCONNECT NO. 5 WATER BY-PASS HOSE

(a) Slide the clip and disconnect the No. 5 water by-pass hose from the water inlet with water pump housing sub-assembly.

6. DISCONNECT NO. 2 RADIATOR HOSE

(a) Slide the clip and disconnect the No. 2 radiator hose from the water inlet with thermostat sub-assembly.

7. REMOVE AIR CONNECTOR STAY

(a) Remove the bolt and air connector stay from the water inlet with water pump housing sub-assembly.

8. REMOVE WATER INLET WITH WATER PUMP HOUSING SUB-ASSEMBLY

(a) Slide the clip and disconnect the No. 4 water by-pass hose from the water inlet with thermostat sub-assembly.

NOTICE:

Do not apply force to the water inlet with thermostat sub-assembly when disconnecting the No. 4 water by-pass hose.
Do not damage the water inlet with thermostat sub-assembly.

(b) Remove the bolt, 2 nuts and water inlet with water pump housing sub-assembly from the cylinder block sub-assembly.

9. REMOVE WATER INLET WITH THERMOSTAT SUB-ASSEMBLY

(a) Remove the 2 bolts and water inlet with thermostat sub-assembly.

(b) Remove the gasket from the water inlet with thermostat sub-assembly.