Question about Honda Civic

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Have a 1988 Honda Civic hatchback that is overheating. My son installed a new coolant temperature sensor. The thermostat works Radiator works. Cooling fans are OK according to a 12V testing light.The top radiator hose gets very hot. Could it be the sending unit? Waterpump?

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  • Laura Jul 07, 2010

    Yes, very helpful and clear. Easy to understand. I know exactly what to troubleshoot now.

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Hi,

In most case's if your top hose is getting hot and the bottom hose is still cool then the problem has to be the thermostat.

But if you have tested the thermostat and it is opening and closing at the right tempretures then you could have a flow problem which is your water pump.

If you remove the thermostat then put the engine bacvk togeter with out it and run the engine do you see the water flowing?

If not then you have a waterpump problem.

Are the fans actually switching on at the correct tempreture and then switching off again?

Let me know if this helps, or if you need more information.

Thanks

Jason

Posted on Jul 07, 2010

  • Laura Jul 07, 2010

    Great help. I'm afraid it is the water pump but I'll have my son check it when he visits me next time.
    As far as the fans are concerned they do come on but once the car dashboard gauge registered hot and fans were not running. Even though it might be awhile before I see my son, I would like to continue this conversation then.
    Thanks for your help.
    Laura


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