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-I've went down the list,basically a process of elimination,ive changed water pump,thermosatat,flushed system, changed hoses,camshaft senser,flushed heater core,changed heater core sending unit,and it still overheats,Then i found a crack in the top of the radiator

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  • Hi, can you add more info to your question? For example, which engine do you have? Welcome to the site btw :)
    – George
    Feb 28 '19 at 22:19
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Modern radiators develop cracks after 10 to 15 years and need to be replaced. If your coolant is rusty you have a leak in the motor. Whenever people have cooling system problems take it to the shop for a cooling system pressure check.

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  • Plastic tops and bottoms crack is a few years.
    – blacksmith37
    Dec 22 '20 at 0:13

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