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OK I have a question about my heater, It doesnt seem to want to warm up and when it does it works just ok in town but the minute I drive on the highway it blows cold air again. Could this be that I need to replace the thermastat for one with a higher temp. on it or could it be something not so simple.
I replaced the thermostat and now there's white smoke coming from engine my guess is coolant that was spilled from gasket from not draining it right what do y'all think?
If the smoke is coming up from the engine compartment then I would probably say yes it is just spill that needs to burn off and it should be fine. But if you are talking about out the tailpipe then thats a little more complicated.
I get that same one when its really cold and I let it idle for 10 min. or so to warm up. It only comes up a couple of times a year so I personally don't worry about it, just clear it and go. If it is persistent check the condition of the regular tune up parts cap, rotor, plugs & filters maybe try some injector cleaner.