Duratec Thermostat - Ford part number?
Discussion
You really need to check what comes out as the there where some issues with early CPT Duratecs fitted with thermostats that didn't match the ECU 'fan-on' temperature.
You could use this one as it'll be safe in most engines.
http://www.burtonpower.com/parts-by-fitment-type/p...
It is not really a standard Ford part as the hose connectors are shorter (better fit), is non-electric, and is an 82c. If you can, it is worth checking with Easimap to see what your 'fan on' temperature is.
I know some early duratecs maps were designed to work with 82c but were fitted with a 98c - symptoms were the fan came on before the thermostat opened
You could use this one as it'll be safe in most engines.
http://www.burtonpower.com/parts-by-fitment-type/p...
It is not really a standard Ford part as the hose connectors are shorter (better fit), is non-electric, and is an 82c. If you can, it is worth checking with Easimap to see what your 'fan on' temperature is.
I know some early duratecs maps were designed to work with 82c but were fitted with a 98c - symptoms were the fan came on before the thermostat opened
Edited by DCL on Thursday 20th November 10:37
Thanks for the info.
I did some more research and have found the following:
Caterham sell an 82deg thermostat that looks identical to the burton power one (shorter connectors). The Caterham part turns out to be the thermostat used in the 2.3L engines and the Ford part number (among others) is - 1475495 Link: http://bit.ly/1r1daIs
The other thermostat that Caterham sell (with the longer connectors) turns out to have a Ford part number (again, among others) of - 1476110 This is the one that is currently fitted to my car as it turns out. Link: http://bit.ly/1xtV5Zm
I tested the operation of the thermostat from stone cold today and found that the fan does come on at the exact same time that the thermostat opens (good news), but the temp gauge only gets up to 80-82 deg before the thermostat opening and fan turning on. Once the thermostat opens, the dial goes back down to near 70deg. This process seems to continue while driving. The temp seems to constantly move between 72ish and 82ish degrees while driving.
According the specs of the thermostat, it should be opening at 90deg
Could it be that my temp gauge is under-specifying the temp?
How can I test this? Measure the incoming voltage across the terminals? What should I expect to see for what temperature?
I did some more research and have found the following:
Caterham sell an 82deg thermostat that looks identical to the burton power one (shorter connectors). The Caterham part turns out to be the thermostat used in the 2.3L engines and the Ford part number (among others) is - 1475495 Link: http://bit.ly/1r1daIs
The other thermostat that Caterham sell (with the longer connectors) turns out to have a Ford part number (again, among others) of - 1476110 This is the one that is currently fitted to my car as it turns out. Link: http://bit.ly/1xtV5Zm
I tested the operation of the thermostat from stone cold today and found that the fan does come on at the exact same time that the thermostat opens (good news), but the temp gauge only gets up to 80-82 deg before the thermostat opening and fan turning on. Once the thermostat opens, the dial goes back down to near 70deg. This process seems to continue while driving. The temp seems to constantly move between 72ish and 82ish degrees while driving.
According the specs of the thermostat, it should be opening at 90deg
Could it be that my temp gauge is under-specifying the temp?
How can I test this? Measure the incoming voltage across the terminals? What should I expect to see for what temperature?
It sounds like the classic miss-match of ECU and thermostat. Fit the 82C and all your problems will go away as this is most likely what it is mapped for.
Generally the temperature flowing around the core of the engine (via the bypass pipe) is higher than that which the temperature sensor sees until the thermostat opens. I wouldn't worry too much about what you gauge shows - just learn what is normal.
It is worth noting that the thermostat is a double action device. Water always flows through either the bypass pipe or the radiator. The bypass is essential for the cooling system to operate in this configuration.
Hot
Cold
Bypass
Generally the temperature flowing around the core of the engine (via the bypass pipe) is higher than that which the temperature sensor sees until the thermostat opens. I wouldn't worry too much about what you gauge shows - just learn what is normal.
It is worth noting that the thermostat is a double action device. Water always flows through either the bypass pipe or the radiator. The bypass is essential for the cooling system to operate in this configuration.
Hot
Cold
Bypass
Thanks DCL - great information as always!
Yes, when I said 'open', what I actually meant was 'flowing through the radiator'. In my case the fan seemed to come on at the exact same time as the warm coolant start to flow into the top of the radiator. Is this not how it should be? In what order should things happen?
I will order the 82c Thermostat and fit it. I take it that it will definitely fit even though it seems to be designed for the 2.3L engine?
Yes, when I said 'open', what I actually meant was 'flowing through the radiator'. In my case the fan seemed to come on at the exact same time as the warm coolant start to flow into the top of the radiator. Is this not how it should be? In what order should things happen?
I will order the 82c Thermostat and fit it. I take it that it will definitely fit even though it seems to be designed for the 2.3L engine?
The fan should come on only when not moving, ideally several minutes after being stationary (when up to temperature). I can't remember the actual figures but I would have thought 90-95C region.
The engine will run a little cooler with the 82C, but it make the radiator work earlier and, more importantly, hot when the fan starts. It'll give you a bigger margin before it overheats. The Caterham Duratec can 'cycle' a little so you will see the temperature swing by about 5C continuously, but the 82 stat my reduce it.
In terms of performance, it will make no difference. Ford design their cars to run as hot as possible to get better fuel efficiency and reduce emissions, but that is not what a Caterham is about
.
Edit: It should fit as the hose is the same for both and not that tight around it. If you have a S3 it will be a better as there's more space.
The engine will run a little cooler with the 82C, but it make the radiator work earlier and, more importantly, hot when the fan starts. It'll give you a bigger margin before it overheats. The Caterham Duratec can 'cycle' a little so you will see the temperature swing by about 5C continuously, but the 82 stat my reduce it.
In terms of performance, it will make no difference. Ford design their cars to run as hot as possible to get better fuel efficiency and reduce emissions, but that is not what a Caterham is about
. Edit: It should fit as the hose is the same for both and not that tight around it. If you have a S3 it will be a better as there's more space.
Edited by DCL on Thursday 20th November 21:32
Gassing Station | Caterham | Top of Page | What's New | My Stuff