Tribute 2WD L4-2.5L (2009)
Thermostat: Testing and Inspection
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COMPONENT TEST - THERMOSTAT, 2.5L
Thermostat
A new thermostat should be installed only after the following tests and checks have been carried out:
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See: Testing and Inspection/Pinpoint Tests/Pinpoint Test 1: Loss Of Coolant, See: Testing and Inspection/Pinpoint Tests/Pinpoint Test 2: The
Engine Overheats or See: Testing and Inspection/Pinpoint Tests/Pinpoint Test 3: The Engine Does Not Reach Normal Operating Temperature.
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Thermostat Visual Inspection
Thermostat Visual Inspection
1. Remove the thermostat.
2. Examine the thermostat for signs of damage including:
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Valve not fully seated (light visible through the valve)
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Foreign material lodged in the main valve
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Bent or broken frame of flange
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Bent or broken spring
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Bent or broken valve or valve stem
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Wax leaking from wax reservoir or a bulge in the reservoir
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Any other damage or distortion
3. If damage is found during the inspection, remove any foreign material or broken pieces and install a new thermostat.
NOTE:If no damage is found during the inspection, do not attempt to open the thermostat using hot water or other heat sources. This method is not an
accurate means to test the function of the thermostat and may damage the thermostat.
4. If no damage is found during the inspection, continue troubleshooting the system concern. See - See: Testing and Inspection/Symptom Related
Diagnostic Procedures for further instructions.
