Classic cars forum & vehicle restoration.
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alastairq
Joined: 14 Oct 2016
Posts: 1950
Location: East Yorkshire
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 Posted: Mon Jan 17, 2022 8:27 pm Post subject: |
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| Quote: | | The top of the radiator is obviously the hottest point but what I have read is that it is the temperature of the cooling water that is more useful. The reasoning is that the water temperature in a non pressurised system cannot exceed 100 degrees before it boils so knowing the temperature of the water entering the engine is more informative. |
On the other hand, a fan that cuts in when the water at the bottom gets hot enough, is possibly, already, ''too late?''
In other words, rather than 'containing' the very hot coolant temperature, the fan is fighting a rearguard action.
Any rear-engined Skoda owner who has used their car in competition will know the need to fit a fan switch, bypassing the thermo switch, since, the thermo switch is at the front, and by the time it realises the engine is too hot, it's really too late.
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Dellow Mk2, 1951 built, reg 1952.
Fiat 126 BIS
Cannon special [1996 registered. Built in 1950's]
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Ford Pop chassis, Ashley 1172 bodyshell, in pieces. |
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Ray White
Joined: 02 Dec 2014
Posts: 6304
Location: Derby
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| Posted: Mon Jan 17, 2022 9:51 pm Post subject: |
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| alastairq wrote: | | Quote: | | The top of the radiator is obviously the hottest point but what I have read is that it is the temperature of the cooling water that is more useful. The reasoning is that the water temperature in a non pressurised system cannot exceed 100 degrees before it boils so knowing the temperature of the water entering the engine is more informative. |
On the other hand, a fan that cuts in when the water at the bottom gets hot enough, is possibly, already, ''too late?''
In other words, rather than 'containing' the very hot coolant temperature, the fan is fighting a rearguard action.
Any rear-engined Skoda owner who has used their car in competition will know the need to fit a fan switch, bypassing the thermo switch, since, the thermo switch is at the front, and by the time it realises the engine is too hot, it's really too late. |
I agree with you and have fitted my sender to the top hose. I think the only benefit to a bottom hose fitting would be to know that the radiator was operating properly. |
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MVPeters
Joined: 28 Aug 2008
Posts: 822
Location: Northern MA, USA
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Ray White
Joined: 02 Dec 2014
Posts: 6304
Location: Derby
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| Posted: Tue Jan 18, 2022 1:01 pm Post subject: |
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Despite having set this particular hare running I can see there is a risk that we may be seeking an answer to a problem
that doesn't really exist.  |
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