Coolant flush
A coolant flush is the workshop service of draining the engine cooling system, cleaning out old fluid and deposits, and refilling with fresh coolant to spec.
What it means
Engine coolant is more than just water. It is a precise mix of water and ethylene or propylene glycol with a corrosion-inhibitor package designed to protect the radiator, water pump, head gasket, and cylinder block. Over years of heat cycling, the inhibitor package breaks down and the coolant becomes acidic, attacking the very components it was meant to protect. A coolant flush drains the entire system, including the radiator, hoses, and overflow tank, sometimes with a cleaning agent to dissolve scale, before refilling with the correct OEM-spec coolant. Most European manufacturers recommend a coolant flush every 2 to 4 years depending on the coolant type. Skipping it leads to silent corrosion, blocked radiators, and overheating events that often coincide with timing belt or water pump failures.
Why it matters in Singapore
Singapore's stop-and-go traffic and tropical heat keep cooling systems working hard year-round. A car driven in Singapore conditions never gets the cool-down rest a temperate-climate car gets in winter, which puts more cumulative stress on coolant chemistry. Skipping coolant intervals is one of the cheaper mistakes that causes one of the more expensive repairs.
How Revol Carz handles this
Revol Carz Garage performs coolant flushes using the OEM-spec coolant for each marque (BMW, Mercedes-Benz, Audi, Volkswagen) and confirms the system is bled of air before handover. Coolant condition is checked at every major service so the flush is scheduled before the inhibitor package fails.