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yes it can.

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12y ago
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Q: Can a faulty reservoir cap or one that popped off during driving cause the car to overheat?
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Why does my 1994 mark overheat briefly spill coolant from the reservoir and then run at normal temp?

it could be a plugged radiator ,faulty thermostate,water pump. or over fill of water that's why of spill. The worst case !!! cracked head gasket.!!!


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to add to this, a big YES,on the radiator cap .the radiator cap needs to be specific pressure rating. radiator caps do wear out. also the cheapest fix to start It is doubtful a radiator cap would cause a car to overheat. Common overheating causes are insufficient coolant, leaking coolant (into or out of your engine), faulty thermostat, blown cooling fan fuse, faulty fan temperature switch ( sender ), faulty fan, or a faulty fan relay.


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