Hyundai i30 Coolant Change | How to Drain, Refill & Bleed the Cooling System- G4GC Engine, by The rusted Alien's garage on YouTube. 6 min 21 s.
- Video length
- 6 min 21 s
- Time to do it
- 1 hour
- Difficulty
- Medium
- Steps
- 9
What you need
Steps
Park on level ground and let the engine cool completely. Never open the radiator cap or drain plug on a hot engine, as scalding coolant can spray out.
Open the bonnet and find the radiator cap and the coolant drain plug or lower hose on the radiator. Place your drain pan underneath.
Remove the radiator cap first to break the vacuum, then open the drain plug or loosen the lower hose clamp and let the old coolant run into the pan.
Close the drain plug or refit the hose and tighten the clamp. Flush with clean water if the old coolant looked dirty, then drain again.
Fit the no-spill funnel to the radiator neck and pour in new coolant until it reaches the base of the funnel.
Run the engine with the heater set to hot and let it idle until the thermostat opens and the coolant level drops. Top up as air escapes.
Squeeze the radiator hoses a few times to push trapped air toward the radiator. Keep topping up until the level stays steady and no bubbles rise.
Refit the radiator cap and let the engine cool. Check the level again and top up the expansion tank to the marked line.
Look under the car and around the hoses for leaks, then take a short drive and recheck the level once the engine is cold.
Tips and common mistakes
Coolant is toxic, so keep it away from children and pets and take used fluid to a local recycling point.
Use only the coolant type Hyundai specifies for your engine, and pre-mix it if it is a concentrate.
Air pockets cause overheating, so bleed the system fully and recheck the level after the first drive.
Questions
How do I know all the air is out of the cooling system?
The level in the funnel stops dropping and no more bubbles rise while the engine idles with the heater on hot. Squeezing the hoses helps push air out.
Can I just top up the coolant instead of draining it?
Topping up is fine for small losses, but a full drain and refill replaces worn coolant. Do it at the interval Hyundai lists for your car.
What do I do with the old coolant?
Pour it into a sealed container and take it to a recycling centre or garage that accepts used coolant. Never pour it down a drain or onto the ground.
This guide was drafted from the video's details and general task knowledge. It has not been checked against the full video. Check the video and relevant product instructions before following a procedure. Report a correction.
