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Please, if someone can tell me how I can tell if the engine has been wrecked. The car was driven for a while with no refrigerant, driver didn’t realize there was no refrigerant until the engine started smoking & car started slowing down. And if engine is wrecked, it has 162k miles on it, is it worth getting new engine? I’m in Phoenix, Az area, if there’s a mechanic you could recommend, would be greatly appreciated. Thx in advance for any & all help!
 

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I'm not super-well-versed with cars, but as I understand it the coolant (refrigerant is usually used to describe the AC refrigerant) keeps most of the engine at about 100 deg C. If you run an engine without the coolant, certaint parts of the engine quickly exceed the melting of point of aluminum and can warp the block and/or pistons. You can do a compression test to determine if compression has been lost. If it's lost, then it's probably not worth the effort to fix because you can't guarantee the block hasn't been warped or damaged.
 
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