Ranger 2WD V6-245 4.0L VIN X SFI (1997)
Radiator Hose: Testing and Inspection
1. Inspect hoses for:
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Visible signs of deterioration such as cracking or checking. Replace if there is visible deterioration.
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Swelling near clamps and at hose ends. Replace if there is swelling.
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Oil or oily dirt on hoses from engine oil leaks or careless filling. Clean off oil and oily dirt on hoses. Oil will attack rubber over time. If there is
weakening or deterioration of a hose, replace it.
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Cuts. If hose is cut other than a very superficial cut, replace hose.
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Hose contacting metal parts, especially sharp edges. If contacting metal parts, loosen clamps and relocate hose. In some cases it may be
necessary to put plastic shielding on hose to protect it. If hose has already been cut or worn, replace it.
NOTE: Cooling system hoses, which operate under a positive pressure of approximately 110 kPa (16 psi) and a temperature of over 95° C (200°
F), are subject to considerable vibration. Any hoses with cuts or deterioration should be replaced, as they are likely to fail on the road with the
attendant risk of engine damage. Reasonably fresh replacement hoses should be used. Replacement hoses which have been in storage for several
years should be checked for ozone-caused hardening. Hoses which have become hard will be difficult to seal and may break in service.
2. Inspect clamps.
