Question about Toyota Corolla
Four main things I can think of off the bat.
1.The radiator you installed was not new, and is rebuilt. The shop that did this merely cleaned it up a little, and spray painted Black on the outside. I have had complaints from people, and had one radiator shop try this on me. Yes, his face turned really red when I calmly showed him the crud, still down inside the radiator with a flashlight, and advised he try again. Then I told him I am a professional mechanic, and if he wanted to step out of the way, I could do the job. (I can)
2.When the thermostat was installed, the coolant system wasn't bleed of air. Air becomes trapped when a thermostat is installed. There may be a drain valve located on the bottom of the thermostat housing.
This is opened until coolant starts to come out, and no air bubbles are present. With my old Corvettes I drill a small hole, (1/8th inch), in the thermostat. The center of the thermostat is a valve. It raises up off the center making an opening. Where the round part of this valve meets the outside part, (Inner hole), of the thermostat, I drill this hole. This bleeder hole then lets any trapped air escape.
3.I appreciate your skill in diagnosing your problem. Did you check the oil level? Maybe you do have a blown head gasket, but it isn't bad enough to spit water out of the tail pipe. (Muffler)
Radiator cap removed when the engine is cold. Warm the car up, and when the thermostat opens, observe the coolant. Are there an abnormal amount of bubbles present? Some bubbling is normal as the coolant passes through. A steady stream of bubbles is not.
4.Bad thermostat. Even if it's brand new, lemons are made. The thermostat is not opening, or isn't opening as far as it should.
Posted on Jul 17, 2009
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Posted on Jan 02, 2017
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