I check and filled the radiator up bc the low coolant light keeps coming on the dash. Well after driving it 25 mins the light pops back on, so I get to where im going pop the hood to check the reservoir and there is coolant sprayed onto the underside of the hood, puddles of it by the battery and dripping under the car. It appears to be coming out the reservoir cap. Any ideas why? I guess its either a bad cap or the radiator is building too much pressure?