MAINTENANCE Coolant Draining WARNING Wait until the engine is cool before removing the pressure cap. Removing the cap while engine is hot and the coolant is under pressure may cause serious scalding. One method of draining coolant from an engine is to use low air pressure to aid the extraction of coolant.
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Remove pressure cap. Siphon as much coolant as you can from the coolant bottle and coolant lines. 3. Remove the top hose from the thermostat and insert it into an empty container. 4. Apply 3-5 psi of air pressure to the thermostat cover until no more coolant can come out of the thermostat hose that you inserted into the container. NOTE: This will only get the majority of the coolant out. Some may remain in the system.
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