dying water temp gauge
Discussion
my water temp gauge seems to die slowly. From cold it operates properly until I rev the engine over 3000 rpm when the needle instantly collapses back to '0'. It then takes some time until the needle starts climbing up again. The higher I rev the engine the longer it takes until the needle comes back. Thx for any hints.
Mine was playing up recently. If you earth the wire from the sender the gauge should shoot up to maximum. That should (hopefully) prove that the gauge is OK, in which case the sender is the problem.
Having seen where the sender is on my Chim 450, it looks like it's at a dead end. I think this causes the gauge to show a lower reading than it should until the whole engine gets fully up to temperature.
I have followed what some others have done, which is to use the redundant sender fitted by Land Rover (on the top of the engine, next to the temp sender for the ECU). All you need to do is put a 150 ohm resistor in the line to the sender and it works fine. And it only costs a few pence.
Having seen where the sender is on my Chim 450, it looks like it's at a dead end. I think this causes the gauge to show a lower reading than it should until the whole engine gets fully up to temperature.
I have followed what some others have done, which is to use the redundant sender fitted by Land Rover (on the top of the engine, next to the temp sender for the ECU). All you need to do is put a 150 ohm resistor in the line to the sender and it works fine. And it only costs a few pence.
A resistor is an improvement, but it only gets it right at one point in the range. The real cure is an adaptor to fit an early Ford type sender into the hole currently occupied by the original Rover one.
The TVR gauge is an electrical match to the early type Ford sender so should give you a good reading at all points on the scale when in a good location like the Rover one.
The sender you need was used on many Ford models back to the 1960's. The last one to use it was the Granada up to about 1993 or 04 IIRC.
The TVR gauge is an electrical match to the early type Ford sender so should give you a good reading at all points on the scale when in a good location like the Rover one.
The sender you need was used on many Ford models back to the 1960's. The last one to use it was the Granada up to about 1993 or 04 IIRC.
Why would you want a Nasa spec water temp guage, you only want to see the running position and worry if it goes higher.
The spare sender is in fact better than the original, it doesnt under read on a cold day, or over read on a hot day. Use a variable resistor(200 ohm) to set it right at normal running temp, simple.
The spare sender is in fact better than the original, it doesnt under read on a cold day, or over read on a hot day. Use a variable resistor(200 ohm) to set it right at normal running temp, simple.
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