How to install the thermostat on 2009 Toyota Prius?

One should begin by adding a new gasket before placing the thermostat so that the jiggle valve points upward and can be positioned between 10 degrees of either side. The water inlet must be fastened to the cylinder block using two nuts which need to be torqued up to 9.0 Nm (92 kgf-cm, 80 in-lbf). Also check that no gasket gets caught between these two components during the process. You should add engine coolant before looking for any signs of leakage. The engine under cover RH together with engine under cover LH must be installed followed by installation of the radiator support opening cover.

OEM 2009 Toyota Prius Thermostat

Engine Coolant Thermostat

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2009 Toyota Prius Thermostat
Part Number: 90916-03093
$22.57 MSRP: $31.42
You Save: $8.85 (29%)
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Product Specifications
- Other Name: Engine Coolant Thermostat; Thermostat, Coolant
- Manufacturer Note: *WAX 82-95
- Part Name Code: 16331A
- Item Weight: 0.70 Pounds
- Item Dimensions: 3.4 x 2.9 x 2.6 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 90916-03093
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
More Info
Fits the following 2009 Toyota Prius Submodels:
- Base, Touring | 4 Cyl 1.5 L FULL HYBRID EV-GAS (FHEV)

2009 Toyota Prius Thermostat

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2009 Toyota Prius Parts Questions & Experts Answers

Q: How to install the thermostat on 2009 Toyota Prius?
A: One should begin by adding a new gasket before placing the thermostat so that the jiggle valve points upward and can be positioned between 10 degrees of either side. The water inlet must be fastened to the cylinder block using two nuts which need to be torqued up to 9.0 Nm (92 kgf-cm, 80 in-lbf). Also check that no gasket gets caught between these two components during the process. You should add engine coolant before looking for any signs of leakage. The engine under cover RH together with engine under cover LH must be installed followed by installation of the radiator support opening cover.

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Alternate Year Models

2008 Toyota Prius Thermostat