See Figures 1, 2, 3 and 4
Upper and lower radiator hoses along with the heater hoses should be checked for deterioration, leaks and loose hose clamps at least every 15,000 miles (24,000 km). Early spring and at the beginning of the fall or winter, when you are performing other maintenance, are good times to perform the inspection. Make sure the engine and cooling system are cold. Visually inspect for cracking, rotting or collapsed hoses, replace as necessary. Run your hand along the length of the hose. If a weak or swollen spot is noted when squeezing the hose wall, replace the hose.
REMOVAL & INSTALLATION
See Figures 5 and 6
- Drain the cooling system into a suitable container (if the coolant is to be reused, make sure the container is clean) by loosening the draincock on the bottom of the radiator.
- Loosen the hose clamps at each end of the hose that requires replacement.
- Twist, pull and slide the hose off the radiator, water pump, thermostat or heater connection.
If the hose is stuck at the connection, do not try to insert a screwdriver or other sharp tool under the hose end in an effort to free it, as the connection and/or hose may become damaged. Heater connections especially may be easily damaged by such a procedure. If the hose is to be replaced, use a single-edged razor blade to make a slice along the portion of the hose which is stuck on the connection, perpendicular to the end of the hose. Do not cut deep so as to prevent damaging the connection. The hose can then be peeled from the connection and discarded.
- Clean both hose mounting connections. Inspect the condition of the hose clamps and replace them, if necessary.
- Dip the ends of the new hose into clean engine coolant to ease installation.
- Position the clamps on the new hose.
- Coat the connection surfaces with a water resistant sealer and slide the hose into position. Make sure the hose clamps are located beyond the raised bead of the connector (if equipped) and centered in the clamping area of the connection.
- Tighten the clamps to 20-30 inch lbs. (2-3 Nm). Do not overtighten.
- Be sure the radiator draincock is closed, then fill the cooling system.
- Start the engine and allow it to reach normal operating temperature. Check for leaks.