Radiator Replacement Cost
Radiator replacement typically costs $400–$1,000 including parts and labor. The radiator is the heart of your cooling system — a failed radiator causes overheating, which can destroy an engine in minutes.
Average Cost
- Economy/aftermarket radiator: $400–$650
- OEM radiator: $600–$1,000
- Aluminum performance radiator: $500–$900
- Labor: 1.5–3 hours ($150–$300)
Causes of Radiator Failure
- Internal corrosion from old, acidic coolant (most common)
- Physical damage — road debris, accidents
- Plastic end tank cracking (common on high-mileage vehicles)
- Electrolytic corrosion from improper coolant or grounding issues
- Scale buildup from hard water or never flushing coolant
Symptoms of a Failing Radiator
- Coolant leak (green, orange, or pink puddle under front of car)
- Overheating engine or temperature gauge rising
- Coolant discolored (rusty, oily, or sludgy)
- External corrosion or cracks visible on radiator fins or tanks
- Low coolant level with no visible external leak (internal leak — very serious)
What to Replace at the Same Time
- Coolant (drained during radiator replacement — always refill with fresh coolant)
- Thermostat (inexpensive, same access)
- Radiator cap (often overlooked — $10–$20)
- Upper and lower radiator hoses if cracked or soft
- Transmission cooler lines if leaking (ATF runs through many radiators)
Aluminum vs. Plastic End Tanks
Most OEM radiators have aluminum cores with plastic end tanks. The plastic tanks crack over time from heat cycling. Aftermarket all-aluminum radiators are more durable but cost more. For daily drivers, a quality aftermarket unit is perfectly reliable. For performance vehicles or tow rigs, upgraded aluminum radiators are worth the investment.
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