How to Replace the Antifreeze in a Buick Regal?
2 Answers
Steps to replace the antifreeze in a Buick Regal: 1. Stop the vehicle and wait until the engine cools down to a low temperature before replacing. Removing the radiator cap when the engine is overheated can cause coolant to splash out, leading to severe burns; 2. Open the engine hood and locate the antifreeze reservoir; 3. Slowly turn the pressure cap counterclockwise. If you hear a hissing sound, wait until the sound stops before slowly unscrewing the pressure cap; 4. Open the coolant drain port under the front of the car to drain the old coolant. After draining completely, clean the coolant bolt port; 5. After thoroughly cleaning the cooling system, refill with new coolant. If the coolant level is below the MIN mark, add coolant until it reaches the MAX mark; 6. Finally, tighten the cap, close the engine hood, and start the car for 3 to 5 minutes.
Last time I spent half a day changing the coolant in my Regal, and I must share some key lessons. The most crucial thing is to wait until the engine cools completely – hot coolant spraying out is extremely dangerous. Locate that plastic drain valve at the bottom of the radiator and slowly turn it open with pliers. Beginners often break the valve core – remember to turn counterclockwise but don't apply too much force. After draining, don't rush to add new fluid; I prefer flushing the radiator 2-3 times with a garden hose connected to a soft tube until clear water runs out. The factory manual specifies using Dex-cool orange coolant – never mix it with the green type. When refilling, you must bleed air by loosening that small vent screw near the hood, then tighten it only when coolant flows continuously without bubbles. Finally, start the engine and let the temperature reach 90°C – wait until the cooling fan cycles twice to confirm complete circulation.
