How to install the thermostat on Toyota Prius?

Installation of the thermostat would require addition of a new gasket and placing the jiggle valve up. Tighten the water inlet into the cylinder block with 2 nuts at 9.0 Nm torque, making sure that the gasket is not caught. Insert coolant, verify leaks and place the engine covers on.

OEM Toyota Prius Thermostat

Engine Coolant Thermostat

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Toyota Prius Thermostat
Part Number: 90916-03093
$22.57 MSRP: $31.42
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Product Specifications
- Other Name: Engine Coolant Thermostat; Thermostat, Coolant
- Manufacturer Note: *WAX 82-95
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2001-2009 Toyota Prius | Base, Touring | 4 Cyl 1.5 L FULL HYBRID EV-GAS (FHEV)

Toyota Prius Thermostat

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Toyota Prius Thermostat Parts and Q&A

Thermostat
90916-03093
Q: How to install the thermostat on Toyota Prius?
A: Installation of the thermostat would require addition of a new gasket and placing the jiggle valve up. Tighten the water inlet into the cylinder block with 2 nuts at 9.0 Nm torque, making sure that the gasket is not caught. Insert coolant, verify leaks and place the engine covers on.

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