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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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07-02-2018, 03:27 PM | #1 |
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Coolant Flow Direction?
Does anyone know for certain which direction does the coolant flow in our cars? Does the coolant come out of the top port of the radiator, or go into the top port of the radiator.
Ill check the temperature differences between the two to see which leaves the engine (but I'm at work and am thinking of pointless projects). Thanks! |
07-02-2018, 04:28 PM | #2 |
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Since the thermostat is in the lower hose side, I would imagine coolant goes into the rad there and out the top, no? Just guessing tho.
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07-02-2018, 09:18 PM | #3 |
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Well, for years now, the coolant went into the top of the radiator and came out the bottom of the radiator on most gasoline engines .. why would this one be any different?
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07-02-2018, 11:21 PM | #4 |
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I can't think of a good reason. Maybe they were doing it wrong all that time.
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07-02-2018, 11:59 PM | #5 | |
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Quote:
NOW, that we have this "boxer" type engine, that sits flat, but it is still water cooled, whereas the older flat fours were air cooled. So, since a water pump is needed (or is it?), should the water be pushed (or pulled) from one side to another or from front to rear or rear to front? Further more, if we had a radiator on each side, could we just allow natural convection to move the water through the water jackets .. thus eliminating the water pump altogether which would get rid of the water pump pulley and not requiring the mod for a lightweight pulley. humfrz |
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07-03-2018, 01:03 AM | #6 | |
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Quote:
They didn't work very well.
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07-03-2018, 01:21 AM | #7 | |
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Quote:
We had a 1941 Ford 2 ton truck back on the farm. You could fill it with hay or grain and run it in granny gear all day long on the hottest days and it would never overheat. Why not? Because it had a radiator that was about three feet wide and about four feet tall …. humfrz |
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10-01-2022, 12:03 PM | #8 |
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Coolant flow output hose?
So, did we determine coolant flow direction?.
I recall some muscle car engines boasted “reverse flow” back in the day. I’m wanting to install an inline sensor for water temp so must confirm which hose carry’s the blocks coolant output.
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10-01-2022, 05:44 PM | #9 |
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Coolant always flows from the hot side of the thermostat through the valve plate.
^^^I'm leaving this here even though I was wrong. Actually useful diagram
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Last edited by Ultramaroon; 10-02-2022 at 03:08 PM. Reason: Owning my shit |
10-01-2022, 05:59 PM | #10 |
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Why would you try to suck from the top were you can have air?
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10-02-2022, 06:41 AM | #11 |
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10-02-2022, 07:42 AM | #12 |
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i'm wondering if the flow differs if the car lives in northern or southern hemispheres?
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10-02-2022, 11:02 AM | #13 |
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Thank You All!
I’ll be installing the sensor block into the lower (larger diameter) rad hose.
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10-02-2022, 11:17 AM | #14 | |
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