2002 Chevy vendor Warner Bros. addition

Asked by Elizabeth Oct 19, 2017 at 02:16 PM

Question type: Maintenance & Repair

The heat isn’t working in the back and only
a little in the front. It started making a
knocking sound when you slow down or
stop a couple of days ago and today it
overheated and smoked what could be the
problem

1 Answer
101,515

KenF answered 6 years ago

Have you checked the coolant level? If you're low, the engine is running hot and risks overheating. The lack of heat from the heater core is a sign no coolant is flowing to it. If coolant levels are good, then there may be something restricting the flow of coolant, can be anything from a bad thermostat to a bad water pump or plugged up radiator. Get it looked at asap, as a hot engine runs the risk of blowing a head gasket.

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