Disposing of ethylene glycol into the sewer system or ground water is both illegal and ecologically unsound. Ethylene glycol antifreeze is very toxic. Important: Recover and store used coolant in a used coolant holding tank and submit the used coolant for recycling on a regular basis. Wait until any residual pressure, indicated by a hissing sound, is relieved.Īfter all hissing stops, press down on the radiator cap and rotate the cap counterclockwise in order to remove the cap. Do not press down while rotating pressure cap. Slowly rotate the cap counterclockwise to the detention tab. Remove the radiator cap when the engine is cool:.Remove and clean the coolant recovery reservoir.Ĭaution: Refer to Radiator Cap Removal Caution in Service Precautions.Drain and refill the engine cooling system every 5 years or 240,000 km, (150,000 mi), whichever occurs first. I Suspect that you have AIR in your COOLING SYSTEM Fallow Procedures BELOW to Insure there is NO AIR IN COOLING SYSTEM Draining and Filling Cooling System Draining Procedure Important: Do NOT add any engine coolant supplement sealant pellets to the cooling system. Remove the thermostat, then clean the old gasket material from the mating surfaces. Unfasten the outlet pipe-to-oil pan bolt and the cover-to-outlet pipe bolts. Unfasten the cover-to-outlet pipe bolt, which is accessible through the exhaust manifold runners.ĭisconnect the radiator and heater hoses from the outlet pipe. Properly drain and recover the coolant to a level below the thermostat. Coolant should be reused unless it is contaminated or is several years old. Always drain coolant into a sealable container. This will prove fatal in sufficient quantities. Also, when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. In addition, the engine coolant will require change sooner at 30,000 miles (48,000km) or 24 months.ĬAUTION Never open, service or drain the radiator or cooling system when hot serious burns can occur from the steam and hot coolant. On these vehicles, if silicated coolant is added to the system, premature engine, heater core or radiator corrosion may result. NOTE: When adding coolant, it is important that you use GM Goodwrench DEX-COOL® (orange colored, silicate free) coolant meeting GM specifications.
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