A new thermostat should be installed after the cooling system has been cleaned. Install the thermostat while the cooling system is completely drained or while the cooling system coolant is drained to a level that is below the thermostat housing.
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Failure to replace the engine's thermostat on a regularly scheduled basis could cause severe engine damage. |
Note: If you are only installing a new thermostat, drain the cooling system coolant to a level that is below the thermostat housing.
- Remove all hoses from the thermostat.
- Remove the bolts from the thermostat housing.
- Remove the gasket, the thermostat, and the seal.
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NOTICE A used thermostat can be installed if the thermostat conforms to test specifications, and the thermostat is not damaged. Do not install a used thermostat that has excessive buildup or deposits.
Show/hide tableNOTICE Since Caterpillar engines incorporate a shunt design cooling system, it is mandatory to always operate the engine with a thermostat.
Depending on load, failure to operate with a thermostat could result in either an overheating or an overcooling condition.
Show/hide tableNOTICE If the thermostat is installed incorrectly, it will cause the engine to overheat.
- Install a new seal in the thermostat housing. Install a new thermostat and a new gasket. Install the thermostat.
- Install the hoses.
- Add extended life coolant until the coolant level is visible in the sight gauge.
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