Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSTOYOTA2009YARIS BASE, 4D SEDAN, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALCOOLING FANENGINE COOLING SYSTEMTHERMOSTATINSTALLATION

2009 Toyota Yaris Base, 4D Sedan, Automatic

Engine Cooling System: Thermostat: Installation

2009 Toyota Yaris Base, 4D Sedan, AutomaticSECTION Installation

INSTALL THERMOSTAT
1. Install a new gasket onto the thermostat.
2. Install the thermostat with the jiggle valve facing upward.
  HINT:
  
  The jiggle valve may be set within 10° on either side.
  
  Fig 1: Identifying Jiggle Valve Angle
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL WATER INLET
1. Install the water inlet with radiator hose with the 2 nuts.
  Torque: 9.0 N*m (92 kgf*cm, 80 in.*lbf)
Fig 2: Locating Water Inlet With Radiator Hose Nuts
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
ADD ENGINE COOLANT (See REPLACEMENT )
CHECK FOR ENGINE COOLANT LEAKAGE (See ON-VEHICLE INSPECTION )

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.