However, if a loose radiator cap or faulty water pump is ignored for too long, the engine will run out and possibly blow the head gasket or worse. Most coolant leaks cost less than $500 to repair if handled promptly. Minimize Repair Costs By Addressing Coolant Leaks Promptly For small cracks, you may also consider a specialty head gasket sealer for $50 to $100. Of this, roughly $1100 to $1400 goes towards labor. I estimate that the average cost is around $1800 to $2200. Repairing the head gasket is costly because it requires a significant amount of time. Head gaskets usually last the life of an engine but can dry out and crack if the motor continually overheats, allowing coolant to leak out. The head gasket is what seals the connection between your car’s engine block and the cylinder head so that antifreeze can pass between. You can also perform these repairs yourself to reduce overall costs. ![]() ![]() If the tank is fine but the hose needs replaced, pricing ranges from $150 to $450 or more. Replacing an expansion tank typically costs between $400 to $450, according to my experience, which includes roughly $60 to $80 in labor costs. If the tank develops a crack or the connecting hose loosens or breaks, coolant will leak from under your car. It’s located beside the engine and connects to the radiator by a rubber hose. Cracked Expansion TankĪn expansion tank, or coolant reservoir, is essentially a plastic container holding the engine’s antifreeze. However, if the top needs to be substituted, anticipate spending less than $50 on a fresh one at an auto parts shop. How much is a coolant leak repair stemming from a leaky radiator cap? If the cap just needs tightening, repairs may cost nothing. With time, it’s also possible the cap’s seals dry out and crack, allowing pressurized antifreeze to leak out. Yes, even something as simple as a damaged or improperly torqued radiator cap can lead to coolant leaking from your car. Replacing the gaskets and seals is possible, but it’s often more feasible to just swap out the pump. If the timing belt is the issue, costs are slightly less at $367 to $756. Repair CostsĮstimates from RepairPal and Kelley Blue Book show water pump replacement costs range from $400 to $900. If coolant is low, contaminated, or the belt has an issue, the pump can overheat and cause the gaskets and seals to leak. Faulty Water PumpĪntifreeze can also leak due to problems with the water pump, a belt-driven device that circulates coolant through the system. However, if soldering is required or the radiator needs to be replaced, expect to spend $1,000 to $1,500 or more. Replacing a leaky radiator clamp can cost just $15 if you do it yourself.įor small hairline cracks, radiator leak-stop products work great and cost less than $50. If the radiator develops a hole from corrosion or other damage, coolant may leak out. Yet, this also leaves it more exposed to road grime, debris from other vehicles, etc. Your car’s radiator sits in front of the engine for optimal airflow and cooling. 5 Coolant Leak Causes And Repair Costs For Each Damaged Radiator
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