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Is the radiator clean and flowing coolant? is the heater core clean and flowing coolant? are the cooling fans operating? When fans are on, and the engine is hot, the air coming from the fans should be HOT.If its not HOT the radiator could be plugged. Are you sure there is no combustion gases in the cooling system? air has been bled out of cooling system?
Maybe they are right but most oil change shops try talking customers into things they don't need for commission and trained to do so. If you truly believe you have a problem then take to a real garage. Most of those guys can barely succeed changing the oil.
NOW. These cars are notorious for timing belts snapping and GM has advised to replace at 60K. I have this car and it has an interference engine, meaning that if the belt snaps there is a good chance the engine's pistons will bend the intake/exhaust valves, meaning you would have to have the engine rebuilt if this happens.
I am about to have mine changed, along with the water pump and tensioner since the water pump should be replaced before 100,000 and involves the same labor. I've found that at a Chevy dealership the whole package ranges from $500-$800 depending on who you call.
you're water pump is going out and the car is overheating as a safety mechanism the chevy company put a senser that shuts down your car when it gets to a certain temperature to prevent any other damages. A new water pump will fix your problem.
Check to see if there is water in the oil...If there is water in the oil then it could have a head gasket problem..Did you ever replace the thermostat? If it is stuck then it would also cause overheating...Excessive exhaust backpressure because of a clogged catalytic converter could also cause overheating..Also check belt tension and condition. A loose belt that slips may prevent the water pump from circulating coolant fast enough and/or the fan from turning fast for proper cooling...Another thing it could be is a faulty Water pump -- Any wobble in the pump shaft or seepage would call for replacement. In some instances, a pump can cause an engine to overheat if the impeller vanes are badly eroded due to corrosion or if the impeller has come loose from the shaft. The wrong pump may also cause an engine to overheat. Some engines with serpentine drive belts require a special water pump that turns in the opposite direction of those used on the same engine with ordinary V-belts... Also check the Fan -- With mechanical fans, most overheating problems are caused by a faulty fan clutch, though a missing fan shroud can reduce the fan's cooling effectiveness by as much as 50% (depending on the fan's distance from the radiator) which may be enough to cause the engine to overheat in hot weather or when working hard.
Well the water pump will be mounted directly to the engine block with two large hoses running from it to your radiator.
When you get the new water pump make sure it has new gaskets in there. Should only be a couple of bolts and it comes right off.
Scrape off all of the old gasket from the engine block before you put the new gasket and pump on.
Good luck!
-Captain Jake
PS - Might have to drain your radiator first, it has a little valve at the bottom. And PLEASE make sure the car is cold so your poor husband doesn't burn the **** out himself :D
Check to make sure the electric radiator fan is running when it idles. Doe sthe temp go up with the a/c on? If not, then it is the colling fan not turning on when it should.
The temp sensor known as the engine coolant temp. sensor tells the computer if the engine is overheating and so forth and tells the injectors how much fuel to give the engine. The temp. sending unit is what controls what your guage reads. It sounds like you need the temp. sending unit. It located near the thermostat housing with a single pole connector.
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