catch tank forkner bike

dirty1974
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dirty1974
Edited Date/Time 2/12/2020 12:04pm
Can someone explain me what's the use for that catch tank because when te coolant escapes the radiator it has to overcome the spring pressure from the radiator cap ...that's a one way valve ..no way back , i dont get it .

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Mit12
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Mit12 2/11/2020 10:50pm
2/11/2020 10:50pm
The same way the one on your car does. The cap seals pressure not vacuum.
dirty1974
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dirty1974 2/11/2020 10:53pm
2/11/2020 10:53pm
i mean , the mecanic was talking about the coolant returning to the radiator when the temperature drops to normal values ..how's that possible with a one way valve ?
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Mit12
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Mit12 2/11/2020 10:54pm
2/11/2020 10:54pm
dirty1974 wrote:
i mean , the mecanic was talking about the coolant returning to the radiator when the temperature drops to normal values ..how's that possible with a...
i mean , the mecanic was talking about the coolant returning to the radiator when the temperature drops to normal values ..how's that possible with a one way valve ?
Due to this vacuum, a vacuum valve in the radiator cap opens allowing the coolant which was flown into the radiator coolant overflow tank back into the radiator.
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CASH476
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CASH476 2/12/2020 3:14am
2/12/2020 3:14am
dirty1974 wrote:
i mean , the mecanic was talking about the coolant returning to the radiator when the temperature drops to normal values ..how's that possible with a...
i mean , the mecanic was talking about the coolant returning to the radiator when the temperature drops to normal values ..how's that possible with a one way valve ?
The cap basically has 2 one way valves Wink
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dirty1974
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dirty1974 2/12/2020 3:35am
2/12/2020 3:35am
stupid me ! never tought about that ..its pure logic , thanks guys
bentiggerwyles 2/12/2020 4:25am
2/12/2020 4:25am
Great explanation and good picture to illustrate how it works I always just assumed it worked I never really had an idea
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mxtech1
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mxtech1 2/12/2020 6:09am
2/12/2020 6:09am
Since they have gone to metal starting grates on the line, they don't want to take the chance of a hot running bike spitting coolant on the metal grates potentially reducing traction.
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resetjet
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resetjet 2/12/2020 6:25am
2/12/2020 6:25am
Heat causes expansion and therefore pressure builds. Cooling causes contraction and therefore creates a lower pressure then whats in the bottle.
hubbardmx50
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hubbardmx50 2/12/2020 11:02am
2/12/2020 11:02am
Science is rad!
FWYT
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FWYT 2/12/2020 12:04pm
2/12/2020 12:04pm
bentiggerwyles wrote:
Great explanation and good picture to illustrate how it works I always just assumed it worked I never really had an idea
Same! I guess I never really realized there was a second valve (vacuum) in the cap. D'oh!

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