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Question DetailsAsked on 1/21/2016

How much does it cost to have a broken thermostat replaced?

How much does it cost to have a broken automobile thermostat replaced?

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1 Answer


No promises, as some cars seem to be designed to prevent easy repairs - but generally, with a thermostat that is accessible from the top (most are) generally about $25 part with gasket (around double that if the thermostat housing has cracked, which is rare but happens, about $100-150 labor - plus around $20-50 antifreeze/additives if your radiator lost a lot of liquid in the process, or the coolant was diluted with water to make up for lost coolant.

This assumes the engine did not get hot enough to blow off most of the coolant, which could have caused internal engine damage, or if a plastic radiator, melting of it too.

As part of the replacement, be sure it includes a running test to full temp to be sure it is working right, to top off coolant after it circulates out any bubbles, and engine oil check to be sure it did not cause engine overheating which could have damaged the engine. Generally, if you stopped the engine as soon as it read hot or shut it off as soon as it started steaming (if it overheated), generally no damage. IF the coolant basically all drained away, it overheated to the point of going past steaming (steamed off most of the fluid), or the engine started running rough or lost power, then internal engine damage would be a distinct possibility and you should take it to a professional shop that will check out the engine and whjo can handle significant engine repairs and rebuild if necessary, not just a corner garage mechanic.

Answered 4 years ago by LCD

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