Lots of things. Is the fan coming on? Do you see a leak? Is there coolant
at the tail end of the exhaust pipe? If there is a leak, and you let it get
low enough, the "boiling" now could be the cooling system getting rid of
vestiges of air from the engine. Carry a jug of Honda Genuine coolant, and
if the level in the overflow tank goes down more, then you might have a
leak. If you ever over heated the engine, you might have a head gasket
leak.

Saludos cordiales,

Earle

<imblest11@gmail.com> wrote in message
news:1183660801.144000.79620@n60g2000hse.googlegro ups.com...
> I have a 95 Honda Accord. Whenever we let it idle or drive for a while
> afterward there is a boiling sound from the radiator overflow tank. At
> first we thought it was just low so we filled it to the max and then
> let it suck up whatever it needed and then refilled it. Now, it seems
> to be at an adequate level but it's still boiling. The weird thing is
> that the temperature gauge in the dash doesn't seem to register the
> heat. It doesn't seem to be moving at all. We just had a friend
> replace the thermostat like we thought the problem was from
> originally, but that didn't seem to do the trick. Does anyone know
> what the problem could be?
>



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