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Engine Cooling System: Maintenance Pontiac Bonneville X

Cooling System (Mechanical) 1 illustration ~282 words

Draining Procedure

CAUTIONRefer to RADIATOR CAP REMOVAL CAUTION .
CAUTIONAn electric fan under the hood can start up even when the engine is not running and can injure you. Keep hands, clothing and tools away from any underhood electric fan.

Important: Recover and store used coolant in a used coolant holding tank and submit the used coolant for recycling on a regular basis. Do NOT pour used coolant down the drain. Ethylene glycol antifreeze is very toxic. Disposing of Ethylene glycol into the sewer system or ground water is both illegal and ecologically unsound.

Scheme 63

Scheme 63
Scheme 63
  1. Place a drain pan under the radiator drain valve in order to collect all of the used coolant.
  2. Remove the radiator pressure cap. Clean the cap. Test the cap. If necessary, replace the cap. Clean the radiator filler neck. Inspect the filler neck.
  3. Completely drain the cooling system by opening the radiator drain plug at the bottom of the radiator.
  4. If the coolant is dirty, or if there are deposits in the radiator, flush the cooling system before refilling. Refer to «FLUSHING»(ref-176475-S02003967522005050500000) .
  5. Disconnect the hose from the coolant recovery reservoir. Remove the reservoir. Refer to «COOLANT RECOVERY RESERVOIR REPLACEMENT»(ref-176475-S34614663322005050500000) . Clean the outside of the coolant recovery reservoir. Pour out any fluid. Thoroughly clean the inside of the reservoir using soap and water. Thoroughly flush the reservoir with clean water. Drain the reservoir.
  6. Install the reservoir. Connect the reservoir hose. Refer to «COOLANT RECOVERY RESERVOIR REPLACEMENT»(ref-176475-S34614663322005050500000) .

Flushing

Important: Do NOT add any engine coolant supplement sealant pellets to the cooling system.

  1. Park the vehicle on a level surface.
  2. Remove and clean (flush) the coolant recovery reservoir. Refer to «COOLANT RECOVERY RESERVOIR REPLACEMENT»(ref-176475-S34614663322005050500000) .
  3. Flush the engine cooling system. Follow the flushing equipment manufacturer's instructions.
  4. Install the coolant recovery reservoir. Refer to «COOLANT RECOVERY RESERVOIR REPLACEMENT»(ref-176475-S34614663322005050500000) .
  5. Fill the cooling system. Refer to «DRAINING & FILLING COOLING SYSTEM»(ref-176475-S38463693332005050500000) .

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