motsco_ wrote:
> E Meyer wrote:
>>
>>
>> On 2/20/08 11:03 AM, in article 13ron1td7br568a@[EMAIL PROTECTED]
>> "motsco_" <motsco_@[EMAIL PROTECTED]
> wrote:
>>
>>> E Meyer wrote:
>>>
>>>> Seems like you're jumping the gun a little bit here. How low was it
>>>> in the
>>>> reservoir? When you say reservoir do you just mean the overflow
>>>> tank, or
>>>> the radiator?
>>>> In normal use, the system will settle out to where the overflow tank
>>>> sits at
>>>> the "min" mark when the engine has cooled & the level will rise to
>>>> around
>>>> the "max" mark when the engine is hot & has been running for a while.
>>> ----------------------------
>>>
>>> Where did you get this bit of misinformation? I've owned six Hondas
and
>>> the level in the reservoir never changes more than about 1", hot or
>>> cold, summer or winter.
>>>
>>> If yours changes that much, there's something radically wrong from
what
>>> the Honda engineers designed.
>>>
>>> 'Curly'
>>
>> I get my bit of "misinformation" from the behavior of 27 different
>> cars over
>> a period 38 years. Where do you get yours?
>
> ---------------------
>
> Sorry, misinformation is a strong word.
>
> Volvos and Dodge products that I owned had pressurized reservoirs. The
> coolant level in them went up and down with temperature, but the HONDA
> isn't supposed to, since it's reservoir isn't under pressure at all.
> Boiling hot coolant isn't supposed to take up much more room than cold
> coolant, as long as the rad cap is keeping the pressure up.
sorry, that's fundamentally incorrect. coolant liquid most definitely
expands as it heats - for both systems. pressure doesn't stop coolant
expanding, it simply raises the boiling point.
http://en.wikipedia.org/wiki/Coefficient_of_thermal_expansion
>
> Since about '92 most Hondas will self-bleed any trapped air because the
> rad cap is the highest point in the system. When any trapped air is
> forced out, the air is supposed to bubble through the reservoir and when
> the system next cools, the level in the reservoir drops as coolant it
> drawn back in. That's when the owner is supposed to add coolant up to
> the MAX mark on bottle. The owner's manuals and the Helms service manual
> all tell the same story.
>
> However, none of this theory applies if there's a hole in a hose, the
> head, the heater core, the water pump seal, or if the rad cap is shot.
>
> 'Curly'
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