1) ONE THING YOU COULD TRY IS CHANGING THE RADIATOR CAP...IF IT'S BAD THE CAR WILL BOIL OVER AND APPEAR TO BE ALWAYS OVERHEATED WHEN ALL THAT'S REALLY WRONG IS THE LACK OF PROPER BACK PRESSURE DUE TO AN OLD/DEFECTIVE RADIATOR CAP. 2) IF THAT DOESN'T WORK YOU COULD TAKE THE THERMOSTAT OUT AND TRY DRIVING THE CAR WITHOUT IT IN AND SEE IF THE CAR RUNS LONGER BEFORE OVERHEATING...IF IT DOES THEN THE THERMOSTAT IS STICKING. THE THERMOSTAT COULD ALSO BE UPSIDE DOWN...IF IT IS IT WON'T WORK RIGHT. patricklaw1957@Yahoo.com You might also check the timing.If it is retarded due to a bad timing chain or needing a tune up this will cause overheating.
When 1990 Honda is running cooling fan does not come on but comes on when engine is off and I thermostat and temperature switch changed?"
Try http://hondatech.info/downloads/Auto for free downloads of Honda Service Manuals and Diagrams.
Any sign of overheating, just replace the thermostat. On a 8 year old car it should be replaced and the cooling system serviced.
Check thermostat make sure fans work replace coolant easily done check manual
The only reason you have oil in your radiator is that you have A BLOWN HEAD GSAKET or a cracked head
Replace it with the exact same temperature thermostat as the one you removed. Do not run the engine without a thermostat. The thermostat is required to keep the engine running at the optimum temperature that will give the best performance and mileage. If it is overheating running it without a thermostat is not the solution.
Sort of. It's in the housing. You do need it. It can be changed if that is what you need to know.
If it is overheating or taking a long time to reach full operating temperature then it may need a new thermostat. If you even suspect it is not functioning properly just replace it.
Check to make sure you have the correct mixture of anti-freeze and water because anti-freeze also helps with overheating too. If you still have a problem check your thermostat. It could be stuck closed and may not be opening.
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