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Use a garden hose and flush your cooling system (specifically the heater core) to clear out any blockage or buildup. Once the water comes out clear put the hoses back on and refill the radiator and overflow tank with 50/50 Antifreeze and see if you have heat. If not the next thing to check/replace is the heater core itself.
? 3:51
https://www.youtube.com/watch?v=pq2DoQq6q0A
Apr 18, 2014 - Uploaded by DerrickTheMechanic
How to change them out.And what they ... 2005 Chevy Impala3.8Liter ... Heater core information, coolant leak, bypass,replacement, hoses, etc.
? 3:12
https://www.youtube.com/watch?v=OFxQJXWszs8
Jun 19, 2013 - Uploaded by klowny1969
How To Change A Heater Core - Part 2 of 2. klowny1969 ...Impala . Caprice . Nova . Biscayne . Corvette . Denali . Landcruiser . ... Chevrolet 1500 * 2500 Truck * Heater Core Replacement * Gasoline * 1997 - Duration: 11:59.
images for 2005 Chevrolet Chevrolet Impala LS ...
What does the temp. gauge show when the antifreeze bubbles out?
I assume the coolant level is up when the overheat happens?
A heater core shouldn't cause overheating unless it has leaked out enough coolant...
If the car had a bad overheat you might have a bad head gasket. A shop with a gas analyzer can check your coolant to see if there are excessive hydrocarbons - telltale signs of internal engine issues...
Yes a heater core that is slightly plugged will do this.. Also I found once, that there is a restrictor inline in one of the heater hoses looked like a plastic hose connector and It had a large flake of lime that would intermittently block off flow check for this as well..good luck
Yes he has to drain the system. It is located at the bottom of the dashboard. If looking into the engine compartment, you will see whre the hoses connecting to the heater core go into the cab at the back firewall.The heater core is just inside the cab.
It appears I was incorrect about removing the dash assembly, here are the instructions from a Buick owners club.
Under the passenger dash is an access panel that will allow you to remove the heater core, it really isn't that hard, there are lots of little dash screws and panel screws to remove before you get where you need to be but at least it is roomy. The AC evaporator is located by the heater core. I will give you a tip. I changed mine last year and the heater core that I ordered for my 92 Roadmaster was not correct, when I took my old one out and matched it in a book at the local part store, the heater core for my vehicle was listed as a 96 Caprice???? The car has been in my family since it was purchased new and the heater core had never been changed!!!! Explain that one!Oh yeah, one more tip, if your heater core is leaking, this access panel lowers towards you, if there is nasty sweet smelling water in there it will pour all over you, be careful! Caprice parts are the same as a Roadmaster,so if you ever need anything just look up caprices
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