95 Accord runs hot on freeway

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Jim Yanik wrote: <snip>


degree of air temp difference. if the energy coming out of the coolant is less than that which can be dumped through the heater matrix, then it definitely can. you'd need to know the numbers to be sure.
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Some Fords have had problems with eroded impeller pumps. It isn't clear whether the impellers are steel or aluminum, magnesium, or other metal, but the picture I saw was clearly of metal. IIRC dissimilar metals in inadequate coolant were involved.
Mike
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If it runs fine on city street but not on the highway, it's most likely a clogged rad.
A test: Next time it starts to overheat, turn the car's interior heater on full-hot, along with the fan on full-blast. Does this make the needle go down? If so, the rad isn't cooling properly.
One thing to check is the fins at the bottom of the rad. If they corrode and turn to dust, the rad will be unable to shed heat efficiently.
--
Tegger

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Anybody check to lower hose on the radiator,I have heard of a lower hose that would collapse at high RPM from the water pump. The lower hose contains a stint when new to prevent this from happening. That stint maybe rusted away allowing this action to take place.

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