Quote:
Originally Posted by Brian Carlton
However, this vehicle never moved above 90°C. on the gauge unless the ambient temps were well into the '90s. It's sitting at 100°C. on occasion with the ambient temp in the '60s. Quite strange.
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my car is the same way. on a hot summer day, 90 to 100 degF ambient the water temp guage is nailed to 95, no matter what driving conditions. but whenever it is raining or night time driving it goes up to 100, then goes back to 95, it fluctuates back and forth, up and down, and so on, especially now that the ambient temps here is now ranging from higher 80's and lower 70's, high and low. it always acts this way since i got the car, different beahvior each season, never had any problem, so i think it is normal for this particular car. but i want a new plastic 9 blade fan, because i think my current 9 blade aluminum is now too heavy for my old fan clutch.
anyway, my analysis tells me that the reason it is behaving weird like this is, i think that the fluid in the radiator is too cold when ambient temp is not that hot, therefore when the thermostat opens the cold water from the radiator immediately shuts the thermostat down until it becomes hot again to trigger it to open and allow the cold fluid to cool the engine again and shut the thermostat, and so on, hence the gauge fluctuation. hot. cold. hot. cold. hot. cold....
09-16-2006, 08:30 PM
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