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Collapsing radiator hoses (especially upper radiator hose ) may be an indication of a malfunctioning vacuum relief valve in the engine . Inspect and clean vacuum valve. Also make sure that overflow hose is open between overflow bottle and radiator .
The cooling system upper radiator hose should be replaced whenever they become cracked, swelled, deteriorated, or have a tendency to collapse.
Partially drain the cooling system to replace a cooling system upper upper radiator hose . Drain the cooling system completely to replace the radiator upper radiator hose .
NOTE: In some cases, prevailing compression spring clamps are used to attach the upper radiator hose and lower radiator hose to the radiator . The clamp for the lower radiator hose is the larger of the two. Do not switch the clamps on upper radiator hose and lower radiator hose .
WARNING: DO NOT STAND IN LINE WITH OR NEAR THE ENGINE COOLING FAN BLADE WHEN THE ENGINE IS RUNNING.
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WARNING: NEVER REMOVE THE RADIATOR CAP UNDER ANY CONDITIONS WHILE THE ENGINE IS OPERATING. FAILURE TO FOLLOW THIS INSTRUCTION COULD RESULT IN DAMAGE TO THE COOLING SYSTEM OR ENGINE AND/OR PERSONAL INJURY. USE EXTREME CARE WHEN REMOVING THE RADIATOR CAP FROM A HOT RADIATOR . IF POSSIBLE, WAIT UNTIL ENGINE HAS COOLED, THEN WRAP A THICK CLOTH AROUND THE RADIATOR CAP AND TURN IT SLOWLY TO THE FIRST STOP. STEP BACK WHILE THE PRESSURE IS RELEASED FROM THE COOLING SYSTEM. WHEN YOU ARE SURE ALL THE PRESSURE HAS BEEN RELEASED, PRESS DOWN ON THE RADIATOR CAP (STILL USING A CLOTH), TURN AND REMOVE IT.
WARNING: USE CAUTION WHEN ADDING COOLANT MIXTURE TO RADIATOR TO AVOID HOT COOLANT OR STEAM BLOW OUT FROM THE RADIATOR .
NOTE: Use the following steps to remove air from the cooling system and to make sure a complete fill can be accomplished.
NOTE: When filling a crossflow radiator , allow time for the coolant to flow through the radiator tubes to the other end tank to make sure radiator is full.