Q: Issues with coolant pouring out of the overflow

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My car has coolant issues. It has gone about 185,000 miles. When I drive, it is usually around the city with a lot of stop and go in the traffic. One time, I turned it on and came after few minutes. I heard some noise under the hood. When I opened it, I saw coolant pouring out of the overflow. The mechanic didn't find anything wrong but replaced the thermometer. The issue persists. It happened again but coolant started disappearing. What caused this? How can I fix it? Thanks.

Hi there. If the engine is losing coolant, then the location of the leak needs to be found first. A leak will allow the coolant to get low enough to cause it to overheat. I start by doing a pressure test on the system to locate the leak. If nothing turns up I would do a dye test. If nothing shows up on that test either, then it more than likely has a head gasket leak.

It is common for the head gaskets to leak on this engine and cause this. If there is an external leak, then that would need to be repaired. The water pump and the radiator are common external failure areas. If you need to have this looked at, consider YourMechanic, as a certified mechanic can come to your home or office to detect any coolant leaks, or any other issues, and then make the appropriate repairs.

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