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Coolant Flush Cost
Drain old coolant, flush the system, refill with fresh coolant.
$100 – $250
Parts vs Labor
35% / 65%
Typical share of total cost
Labor Time
30 minutes to 1.5 hours
At a typical shop
Difficulty
Confident DIY
2 of 5
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Common Symptoms
Coolant looks rusty or brown
Reached manufacturer interval (60,000 to 100,000 miles)
Heater not putting out much heat
Engine running slightly hot
What It Is
Coolant absorbs heat from the engine and dumps it through the radiator. The corrosion inhibitors in coolant break down over time.
Why It Matters
Old coolant becomes corrosive and damages the radiator, water pump, and heater core, all expensive parts.
How to Save Money on Coolant Flush
- Always use the exact coolant type your manual specifies, mixing types causes sludge
- A drain and refill costs much less than a power flush and works fine for most maintenance
Often Done Together
Shops commonly pair coolant flush with these jobs to save on overlapping labor:
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Check My Quote FreeFrequently Asked Questions
How often should coolant be flushed?
Long-life coolants last 60,000 to 100,000 miles. Older green coolant should be changed every 30,000 to 50,000 miles.