Impreza 2.5 RS Coupe AWD F4-2.5L SOHC (2001)
Coolant: Testing and Inspection
Cooling System Inspection
INSPECTION
1. Check radiator for leakage, filling it with coolant and attach radiator cap tester to the tiller neck.Then apply a pressure of 157 kPa (1.6 kg/sq.cm,
23 psi) and check the following points:
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Each portion of radiator for leakage.
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Hose joints and other connections for leakage.
CAUTION: When attaching or detaching tester and when operating tester, use special care not to deform radiator filler neck.
NOTE:
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When performing this check, be sure to keep the engine stationary and fill radiator with coolant.
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Wipe off check points before applying pressure.
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Use care not to spill coolant when detaching tester from radiator.
2. Check the radiator cap valve open pressure using radiator cap tester.
CAUTION: Rust or dirt on cap may prevent valve from functioning normally: be sure to clean cap before testing.
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Raise the pressure until the needle of gauge stops and see if the pressure can be retained for five to six seconds. The radiator cap is normal if a
pressure above the service limit value has been maintained for this period.