How to Top Up Your Coolant Safely
Topping up coolant is simple — but doing it wrong can be dangerous or damaging. A Cranbourne West specialist explains.
Do it safely
Only check or top up coolant when the engine is cold — opening a hot pressurised system can spray scalding coolant. Check the level against the min/max marks on the expansion tank, and top up with the correct coolant type for your car, pre-mixed to the right concentration.
Never use plain water long-term or mix incompatible coolant types — the wrong coolant can cause corrosion or gelling.
Why it matters — and the catch
If you’re regularly topping up, the system has a leak — topping up hides the problem rather than fixing it, and running low risks overheating and serious engine damage.
We use the correct coolant for your car, pressure-test for leaks if the level keeps dropping, and check condition at every service.
We’ll take care of it
Prefer to leave it to a specialist? We look after all of this as part of a service or a quick check — with honest advice on what your car actually needs, not what sells.
Book online in 60 seconds or call a Cranbourne West specialist on 03 8782 0711.
How to Top Up Your Coolant Safely — FAQ
Only when cold, to the min/max marks, with the correct coolant type for your car — never open a hot system.
Not long-term — coolant raises the boiling point and protects against corrosion. Use the correct type.
A leak — topping up hides it. We pressure-test to find the source.
Yes — the wrong type can cause corrosion or gelling. We use the correct one.
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Trusted Cranbourne West car specialists — RACV-accredited, fixed written pricing. Book online or call 03 8782 0711.