Ok, I need help from the experts. My Starlet (4E engine, like the '90s Tercel in the US) has started to overheat on a random basis.
Last week, on the highway, the gauge started to climb, (hot weather) as soon as I stopped for a few minutes, the gauge quickly went back down to normal, and stabilized. After a few minutes of driving the gauge would climb back up again. I parked and went shopping and surprisingly, about a half hour later when I went to drive home, no overheating, nothing worked perfectly.
After this, I flushed the system, checked the radiator, hoses are in good shape, (I should replace the bypass hose but I think that requires pulling the starter?) Thermostat is about 2 years old.
Now suddenly today, in the city, cooler temps and it is suddenly overheating again.
Now what could be random like this? I can see water flowing, water flows through the block, and when it isn't overheating, the temperature stays quite steady on the gauge exactly where it normally is. I am pretty sure that the fan is turning on, it certainly turns on when the A/C is switched on. Could a thermostat be "random" I would have thought that either it works or not, but not sometimes.
Last week, on the highway, the gauge started to climb, (hot weather) as soon as I stopped for a few minutes, the gauge quickly went back down to normal, and stabilized. After a few minutes of driving the gauge would climb back up again. I parked and went shopping and surprisingly, about a half hour later when I went to drive home, no overheating, nothing worked perfectly.
After this, I flushed the system, checked the radiator, hoses are in good shape, (I should replace the bypass hose but I think that requires pulling the starter?) Thermostat is about 2 years old.
Now suddenly today, in the city, cooler temps and it is suddenly overheating again.
Now what could be random like this? I can see water flowing, water flows through the block, and when it isn't overheating, the temperature stays quite steady on the gauge exactly where it normally is. I am pretty sure that the fan is turning on, it certainly turns on when the A/C is switched on. Could a thermostat be "random" I would have thought that either it works or not, but not sometimes.