beaver34
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| posted on 6/12/09 at 10:35 PM |
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cooling basics
im after the basics of cooling,
hot water out of engine, to top of rad?
out of rad back into bottom of engine?
think im going mad thats all
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Rob WM
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| posted on 6/12/09 at 10:41 PM |
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You got the basics
Hot out of top of engine into heater matrix if you are having one then into the top of the rad. Usuall there is a themostatic valve to between the
top of the rad and the engine so that the water is merely circulated around the engine until it reaches about 80 degrees. Once that opens the water
flows into the top of the rad out of the bottom and back into the engine at the bottom. Expansion tanks etc may be added as well as a pressure valve.
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beaver34
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| posted on 6/12/09 at 10:43 PM |
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thanks, my engine is backwords really, thermo stat is at the bottom of engine where cooler water hits it, hot water from out of the r/h of the head,
its a 1600 zetec se,
both heater ports blanked off
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Canada EH!
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| posted on 6/12/09 at 10:43 PM |
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Unless your driving a late model Corvette, water goes out the top of the head trickels down through the rad out the bottom and picked up by the pump
and pushed around again. That's why thermostate is at the top of the engine, keep the cold water in till it's warm.
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boggle
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| posted on 6/12/09 at 10:59 PM |
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subaru ej2o engines thermostat is fitted at the bottom
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beaver34
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| posted on 6/12/09 at 11:04 PM |
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quote:
Originally posted by boggle
subaru ej2o engines thermostat is fitted at the bottom
same with mine, which is what confused me with plumbing the car in as it didnt make sense
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MkIndy7
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| posted on 6/12/09 at 11:45 PM |
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If heating systems are anything to go by it doesn't really matter.
If its at the top it resists Flow until its hot enough to release, (which may be prematurely as soon as hot water hits it, it will release)
If its in the bottom (return) it resists flow until the whole lot is hot enough to start flowing and then it will return and start flowing
properly.
I would presume that most systems are of the latter type so they get hotter quicker and achieve maximum efficiency before releasing the coolant to
flow properly through an adequately sized system.
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britishtrident
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| posted on 7/12/09 at 08:01 AM |
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Growing trend is for modern engines to have the stat at the bottom with a much higher volume of by-pass flow.
When the stat closed the out flow from the rad is shut off and the by-pass flow is unrestricted.
When the stat is open the flow from the bottom of the rad is open and the by-pass flow is restricted.
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tomgregory2000
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| posted on 7/12/09 at 08:04 AM |
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sr20 stat is in bottom hose
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