How to install the thermostat on Toyota Avalon?

Install the thermostat with a new gasket, jiggle valve up (within ±10°). Fit the water inlet and torque to 10 Nm (102 kgf-cm, 7 ft-lbf), then the radiator hose outlet. Install idler pulley No.2, V-belt, LH front mounting brackets, moving control rod, V-bank cover, add coolant, and check for leaks.

How to service and repair the thermostat on Toyota Avalon?

Repair, drain, clean out coolant, take off V-bank cover and heat engine. Disconnect all required hoses and connectors, and then take out the thermostat. Test it in hot water; change, where not to specification. Install new gasket, re-connecting parts, fill the coolant and verify leakage.

OEM Toyota Avalon Thermostat

Engine Coolant Thermostat

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Toyota Avalon Water Inlet
Part Number: 90916-A3003
$22.69 MSRP: $31.59
You Save: $8.90 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Thermostat; Engine Coolant Thermostat; Thermostat, Coolant
- Replaces: 90916-03129, 90916-03084
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1995-2004 Toyota Avalon | XL, XLS | 6 Cyl 3.0 L GAS
View related parts
Toyota Avalon Thermostat
Part Number: 90916-A3002
$24.25 MSRP: $33.74
You Save: $9.49 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Engine Coolant Thermostat; Thermostat, Coolant
- Replaces: 90916-A3001, 90916-03140, 90916-03133
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2005-2018 Toyota Avalon | Base, Limited, Touring, XL, XLE, XLE Plus, XLE Premium, XLE Touring, XLE Touring SE, XLS | 6 Cyl 3.5 L GAS

Toyota Avalon Thermostat

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Toyota Avalon Thermostat Parts and Q&A

Thermostat
90916-A3002
Q: How to install the thermostat on Toyota Avalon?
A: Install the thermostat with a new gasket, jiggle valve up (within ±10°). Fit the water inlet and torque to 10 Nm (102 kgf-cm, 7 ft-lbf), then the radiator hose outlet. Install idler pulley No.2, V-belt, LH front mounting brackets, moving control rod, V-bank cover, add coolant, and check for leaks.
Water Inlet
90916-A3003
Q: How to service and repair the thermostat on Toyota Avalon?
A: Repair, drain, clean out coolant, take off V-bank cover and heat engine. Disconnect all required hoses and connectors, and then take out the thermostat. Test it in hot water; change, where not to specification. Install new gasket, re-connecting parts, fill the coolant and verify leakage.