I changed my radiator and thermostat in my 2007 Buick Lucerne but it still overheating some cooliat is leaking from the under the car why is that
2 Answers
Follow the leak. Some leaks are not directly under the affected area, they leak on something like over a hose or metal piece and drips somewhere else, making it hard to see where the leak is. Check freeze plugs, heater hoses etc
check your waterpump and be sure the bleeder was opened to bleed air out at thermostat housing while filling coolant.