Question about Honda Accord

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1994 Honda Accord. Heat indicator on dash goes to just under red line when idling at stop. OK when moving. There is a fan coming on right after I turn the car off. I did just have the timing belt and heat pump replaced and radiator flushed, transmission fluid flushed/replaced last week. However, I did notice this happened once in awhile as I got out to unlock the garage but only infrequently. Now it was all the way home last night, then all the way to work this morning. About ready to start praying at stoplights. My bad because I forgot to mention it to my mechanics. I just put a fair amount of money into the car because I really want to keep it. It's at 275,000 but still going strong. Everything I've done is just normal maintenance at that mileage. ???

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Ok, if the temp is up that high when you stop, but goes back to normal when you start moving, then you have an air pocket in your cooling system. there is no way that the coolant temperature in your cooling system can heat up and cool off that fast. whats happening is an air bubble is settling right where the coolant temperature sensor is. the air is much hotter then the coolant around it, so when the air hits the sensor, it gives you a false reading of the temp. but when you are driving, the water pump spins faster then at idle, so thats probably what is pushing the air pocket away from the sensor when you are moving. I could be wrong about this, but i have had this problem before with my own car. next time it happens, try putting your car in nuetral and revving the motor while you are sitting. if that makes your temperature go back down, then you definitely have an air pocket. a lot of cars have special bleeder screws, similar to the bleeders on brake calipers, to remove air from the system. take the car back to your mechanic and see if they can bleed the cooling system. that will most likely help you out.

Posted on Sep 04, 2009

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Some radiators do not flush well...sometimes the flush will go around obstructions instead of through them and sometimes flushing will loosen debris which can plug cores that were open. It is possible that your radiator is marginal and not transferring heat properly. Temperature generally increases after shut-down for a short time and that will turn on
the fan.That part is normal...the item of concern is running hot at idle, in traffic.
Likely if you don't have any leaks and the head gasket is good, changing the radiator should help.

Posted on Sep 04, 2009

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Hi,
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3 Answers

1997 Honda Accord temp guage goes up and down. It goes up when when idling @ a traffic light. It rises in between the half way mark and the H. When I accelerate it goes below the half between the C. What...


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1 Answer

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2 Answers

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1 Answer

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