Tribute 4WD L4-2.5L Hybrid (2009)
Coolant Reservoir: Testing and Inspection
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COMPONENT TEST - PRESSURE TEST, DEGAS BOTTLE SYSTEMS - 2.5L
WARNING:Always allow the engine to cool before opening the cooling system. Do not unscrew the coolant pressure relief cap when the engine is
operating or the cooling system is hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened
slightly. Failure to follow these instructions may result in serious personal injury.
NOTE:Vehicles have the pressure relief cap on the degas bottle and no radiator cap.
1. Turn the engine OFF.
2. Check the engine coolant level. Adjust the coolant level as necessary.
3. Attach the Radiator/Heater Core Pressure Tester to the degas bottle nipple and overflow hose. Install a pressure test pump to the quick-connect
fitting of the test adapter.
4. Slowly depress the plunger of the pressure test pump until the pressure gauge reading stops increasing and note the highest pressure reading
obtained. If the pressure reading exceeds the maximum cap pressure listed in the specifications table, install a new pressure relief cap.
CAUTION:Do not pressurize the cooling system beyond the maximum pressure listed in the specifications table, or cooling system components can be
damaged.
NOTE:If the plunger of the pressure tester is depressed too fast, an erroneous pressure reading will result.
5. If the system does not hold pressure, remove the pressure relief cap and wash it in clean water to dislodge all the foreign material from the gasket.
Check the sealing surface in the filler neck of the degas bottle for nicks or cuts. Install the pressure relief cap.
