what colour temp sender for S1 2.8
Discussion
Can anybody give me a clue what colour the top of my temp sender should be? I replaced the old one as it snapped in half and fitted a new one. The temp reads very high before the fan cuts in by itself.
I dont believe it is the switch as its brand new one fitted to a rebuilt rad and is a modern screw in type that is rated to kick in at approx 92 degrees. The car is not overheating or boiling over so the temp is ok, just the reading is not correct on the gauge.
Any clues as get nervous and use the manual override on the fan before it gets too hot or not as the case may be!!!!
I dont believe it is the switch as its brand new one fitted to a rebuilt rad and is a modern screw in type that is rated to kick in at approx 92 degrees. The car is not overheating or boiling over so the temp is ok, just the reading is not correct on the gauge.
Any clues as get nervous and use the manual override on the fan before it gets too hot or not as the case may be!!!!
Hi James, bit lost with the reference to 'colour'quite what you mean ?
It sounds like you are saying that you think your temp gauge is reading higher than the actual engine temperature but you are confident the fan kicks in at the correct 92 degrees.
If so you need to manipulate the signal to the temp gauge to bring it into parrity with the engine temperature sensor and fan otter switch.As you know the temp is 92 degrees when the fan kicks in then you need to adjust the temperature gauge to read 92 degrees to co-inside with the fan kicking in.
This means installing a variable resistor in the wire sending the signal back from the engine temp sensor and setting the resistor so the temp guage reads 92 degrees at the point when the fan operates.
Variable resistors are easy to fit with two fly leads to fit into the sender wire and adjust with a small terminal screwdriver.They cost less than £3 from Maplins.
Either that...or I have misunderstood and this is not the answer.
It sounds like you are saying that you think your temp gauge is reading higher than the actual engine temperature but you are confident the fan kicks in at the correct 92 degrees.
If so you need to manipulate the signal to the temp gauge to bring it into parrity with the engine temperature sensor and fan otter switch.As you know the temp is 92 degrees when the fan kicks in then you need to adjust the temperature gauge to read 92 degrees to co-inside with the fan kicking in.
This means installing a variable resistor in the wire sending the signal back from the engine temp sensor and setting the resistor so the temp guage reads 92 degrees at the point when the fan operates.
Variable resistors are easy to fit with two fly leads to fit into the sender wire and adjust with a small terminal screwdriver.They cost less than £3 from Maplins.
Either that...or I have misunderstood and this is not the answer.
thanks velly muchly for the reply, I was told that you can get 3 or 4 different senders, which have a different colour top some white, some red etc.
Each different sender effects the temp reading on the gauge, the correct one giving the right reading on the gauge. A bit like the variable resistor you have mentioned but set when manufactured.
I wondered if I have fitted an incorrect sender therefore giving the wrong reading.
but I will confirm the temp of the water in my system and use the method you have put forward because that sounds a lot more precise to me.
thanks again.
Each different sender effects the temp reading on the gauge, the correct one giving the right reading on the gauge. A bit like the variable resistor you have mentioned but set when manufactured.
I wondered if I have fitted an incorrect sender therefore giving the wrong reading.
but I will confirm the temp of the water in my system and use the method you have put forward because that sounds a lot more precise to me.
thanks again.
Oh, I get it now. I did not know that different colour coded senders existed before so did not register the colour connection. I wish someone in pigging Ford had told me when I bought one mind, would have saved me a lot of buggering about looking for reasons the guage was suddenly wrong!
Hey Ho... I found an answer which sorts it out in the end. It does have some advantages being able to adjust it.
Hey Ho... I found an answer which sorts it out in the end. It does have some advantages being able to adjust it.
I think the problem with Ford is that the guages fitted to the Ford range were different to the `bespoke` guages on TVR. It is a bit hit and miss finding the right one.
How did you check the temp of the water at the sender? I am going by the temp at the radiator switch which may be a little different to the block temp. Not much I know but may be as much as 10 degs.
I was going to use a probe on the block next to the sender but may not be acurrate reading either.
The fun of owning a `different` car eh?
How did you check the temp of the water at the sender? I am going by the temp at the radiator switch which may be a little different to the block temp. Not much I know but may be as much as 10 degs.
I was going to use a probe on the block next to the sender but may not be acurrate reading either.
The fun of owning a `different` car eh?
Don't know that I can answer that as my local garage did most of the investigating to a point.
I remember they told me they had measured the engine temperature and the temperature at the otter switch as the fan kicked in. They said both were fine and it was the gauge at fault...hence investigation of resistor to adjust the reading on the guage.
They had a point and read thermometer called something clever I have forgotten now, but they said the fan kicked in when they measured the temperature at the otter switch at 92 degrees.
Hence when I got the resistor fitted into the engine temp sender wire I set it at about 92 degrees on the guage when the fan operated.
It seems a fair guide to the temperature of the cooling system as a whole throughout its range and alerts you to any alarming changes or rises in water temperature as the guage should.
I still have issues on my engine temperature but they can wait until warmer weather now!
That's another story.
Great fun indeed. Normal bits easily obtained are a bit of a rarity arn't they!
I remember they told me they had measured the engine temperature and the temperature at the otter switch as the fan kicked in. They said both were fine and it was the gauge at fault...hence investigation of resistor to adjust the reading on the guage.
They had a point and read thermometer called something clever I have forgotten now, but they said the fan kicked in when they measured the temperature at the otter switch at 92 degrees.
Hence when I got the resistor fitted into the engine temp sender wire I set it at about 92 degrees on the guage when the fan operated.
It seems a fair guide to the temperature of the cooling system as a whole throughout its range and alerts you to any alarming changes or rises in water temperature as the guage should.
I still have issues on my engine temperature but they can wait until warmer weather now!
That's another story.
Great fun indeed. Normal bits easily obtained are a bit of a rarity arn't they!
Hi Steve.
Follow proceedure as above with a Maplins variable resistor and it will sort your guage problem.
The fan kicks in at about 92-95 degrees as it uses the otter switch on thr radiator pipe by your battery to activate the fan. Yhis is using a different control than your temp gauge reads...hence variance.
The temp guage reads temp at fromt of block by thermostat which will always be different and depends on the signal strength sent from this sensor to your guage.This signal is correctable by fitting the resistor which you can adjust so your temp guage reading is in cinque with the operation of your cooling fan.
Follow proceedure as above with a Maplins variable resistor and it will sort your guage problem.
The fan kicks in at about 92-95 degrees as it uses the otter switch on thr radiator pipe by your battery to activate the fan. Yhis is using a different control than your temp gauge reads...hence variance.
The temp guage reads temp at fromt of block by thermostat which will always be different and depends on the signal strength sent from this sensor to your guage.This signal is correctable by fitting the resistor which you can adjust so your temp guage reading is in cinque with the operation of your cooling fan.
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