The Correct Method for Adding Coolant?

[DelCorey]

Turn the car key forward to shut off the engine. Let the engine sit until the water temperature drops to normal. Open the front engine hood. Slowly unscrew the small reservoir cap to release pressure from the cooling system.

[LeJaxson]

It's pretty straightforward but requires attention to detail. Make sure the car is turned off and completely cooled down before starting, as hot coolant splashing out is no joke. Pop the hood and locate the expansion tank cap with a thermometer symbol or labeled 'Coolant' (usually a white translucent plastic tank). First, loosen it slowly to release pressure—wait until you hear a hissing sound and the pressure is gone before fully opening it. Coolants come in different colors; red and green types can't be mixed, so check the manual for the correct specification before topping up. The tank has MAX and MIN level marks—fill it to just above the middle, not to the brim. After securely closing the cap, start the engine and let it warm up until the cooling fan kicks in, then check the level again as it might drop slightly and need a small top-up. Finally, wipe off any spilled liquid to prevent corrosion.