Question about 2000 Pontiac Sunfire
It runs a normal temp then rises a little at idle, but when stopped and engine off I can hear the coolant bubbling in the tank.
Posted by Anonymous on
Sounds like thermostat is starting to stick close replace thermostat
Posted on Feb 26, 2015
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Posted on Jan 02, 2017
Front of the engine...looking at the motor...to the driver's side of the alernator...looks like a spark plug almost...has a wire connector going to it. Trying to post the pic...but at least this is a good description.
Posted on Apr 05, 2009
Everything you said is normal. It is common for these to hear coolant in the heater core, especially with a new one. There is a cure for it but it will make the heater not work as well. 200 coolant temp is normal. It is running at 170 with the air on because the fan is running. You can get a thermostat that opens at a cooler temp but the vehicle will run better and get better mileage at 195. Without the air on the fans will come on at 235. I don't see anything wrong.
Posted on Jul 04, 2009
dear friend-there is a couple of things you can do to find the problem,when the engine is cold remove the radiator cap start the engine then look inside to see if the water is circulating,all so look for bubbles in the water,if there is bubbles,you might have a blown head gasket,if there is circulation the water pump is ok,then get the engine up to working temp,then feel both the top and bottom radiator they should be the same temp,if not then the termostat is at fault
Posted on Nov 04, 2009
maybe 3 things....leaking intake manifold gasket(very common on this car because pontiac used plastic manifold gaskets) may also be air in the system....bleed screw is located on the top hose and is painted blue. it may have some air cavitation. you may have a leaky or bad seal on overflow cap. check your oil dip stick...if there is a milk shake type foam look to it then the gaskets are ready to fail. get a compression test done and it will confirm everything the easy way. harbor freight sells a radiator pressure test kit and it works like a champ and its cheap....good luck
Posted on Jan 13, 2010
CODE 15 - Engine Coolant Temperature (ECT) Sensor Circuit (Low Temp.)
It's no surprise that your mileage was affected, damage to the ECT sensor will affect proper operation of the fuel injection system.
Posted on Feb 23, 2010
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