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I have a 2001 Chev Malibu LS, V6, temp guage is not showing any heat at all, not registering when I know the coolant is hot ? Veh has about 126000 mi on it, never been flushed out, thought I would attempt to flush myself but dont you think the problem might be a bad thermostat ? If so, where and how do I change it out ?
These vehicles came with the Dex-Cool, which is famous for sludge and blockages. I would certainly start with an exstensive flush. Do you still have heat inside ? You should change your thermostat at the same time as the flush after 126k. Also the temperature sensor is the one that drives your display and is seperate from your thermostat.
I have a 2001 Chev Malibu LS, V6, temp guage is not showing any heat at all, not registering when I know the coolant is hot ? Veh has about 126000 mi on it, never been flushed out, thought I would attempt to flush myself but dont you think the problem might be a bad thermostat ? If so, where and how do I change it out ?
RJ,
Thanks very much, I will flush but before I start can you tell me where the thermostat is ?
By the way, Merry Christmas. I will anxiously wait for your answer about the thermostat.
It appears to me that the temperature sensor could be bad. Drain radiator and try and remove engine drain plugs, to thoroughly drain old antifreeze. Inspect condition of cooling system. Replace temperature sensor. If everything appears fine, refill with a 50/50 mixture of Dexcool and distilled water. Make sure to fill the overflow tank slightly over the "MAX" line. Problems with Dexcool can be prevented by keeping the system filled and purging air from the system.
TXGreaseMonkey and RJMorrow let me ask you and any others that might can help:
1) Where is the temperature sensor? Is it hard to replace? I called an auto parts place and they said I probably can only get this from a dealer.
2) Also you said "drain radiator and try and remove the engine plug(s) - did you mean the one radiator drain plug?
1. I am not sure where the temperature sensor is located on your car. Normally, they are screwed into the water jacket of the intake manifold. Should be very easy to replace. You may be able to get it from RockAuto.com.
2. Open the pip cock, plus undue two threaded drain plugs in the engine block. Normally, there's one on the front and back side of the block.
If you can't, or don't want to, remove the engine block drain plugs, drain the radiator, replace with distilled water, drive the car for 10 minutes, and drain the system again. Repeat, if necessary, until the water comes out clear. Then, refill with a 50/50 mixture of Dexcool and distilled water. Do not use tap, well, or softened water. Remember to turn your heater on to max, while you are doing this, to flush the heater core.
In the future, I would recommend changing the antifreeze every 3 years.
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