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How do you completely drain a Pontiac 350 cooling system?

Step 1: Gather Your Tools

- Safety glasses

- Socket set

- Funnel

- Drain pan

- Wrench

- Garden hose

- Distilled water

- Coolant

Step 2: Prepare the Vehicle

- Park your vehicle on level ground.

- Engage the parking brake.

- Allow the engine to cool down completely.

Step 3: Locate the Radiator Drain Plug

- Open your hood.

- Find the radiator drain valve, which is usually a one-inch bolt on the bottom of the radiator.

- Place a drain pan underneath the valve to catch the coolant.

Step 4: Drain the Radiator

- Remove the radiator drain plug using the wrench.

- Allow all of the coolant to drain from the radiator.

- Replace the radiator drain plug.

Step 5: Drain the Engine Block

- Find the engine block drain plug, which is usually a 3/8-inch bolt on the side of the engine block.

- Place a drain pan underneath the valve to catch the coolant.

- Remove the engine block drain plug using the wrench.

- Allow all of the coolant to drain from the engine block.

- Replace the engine block drain plug.

Step 6: Flush the Cooling System

- Turn on the water hose and spray water into the radiator until the water runs clear.

- Drain the water from the radiator.

Step 7: Refill the Cooling System

- Pour new coolant into the radiator until the radiator is full.

- Start the engine and let it run for a few minutes.

- Turn on the heater to bleed the system.

- Check the coolant level and add more coolant if necessary.

Step 8: Dispose of the Old Coolant

- Recycle the old coolant according to local regulations.

- Do not pour old coolant down the drain or onto the ground.