Water Temp sensor. help..

[jaffaz32]

The guage on the Dash for water temp where is the actual sensor?

I have a strange problem, it takes forever for my temp to go up and some times drops down to nothing again on a long drive.

Has anyone else experianced this?

I have replaced my thermostate and excatly the same.

Going to fit a oil temp sensor but... would really like to know what the water temp is accurately reading also.

Thanks.

 

[pgilliam1]

There are many posts here on this. Do a "search" here and get ready to read. I think the WIKI has photo part schematics where you can locate almost any part you seek.

My guess is your problem is a defective temp guage sending unit. If the car's temp was actually fluctuating the way your guage indicates you would also have idle fluctuation problems. Good Luck!

 

[jaffaz32]

There are many posts here on this. Do a "search" here and get ready to read. I think the WIKI has photo part schematics where you can locate almost any part you seek.

My guess is your problem is a defective temp guage sending unit. If the car's temp was actually fluctuating the way your guage indicates you would also have idle fluctuation problems. Good Luck!

I've look and can't find much however i did find a picture of it's location and it looks like it is on the throttle body, is this correct?

If this is the case if you were to bypass the throttle body coolant would it also bypass the sensor?

 

[pgilliam1]

No. The water temp sensor for the guage is right next to where the hose from the coolant overflow tank connects (the same housing assembly as the thermostat). It has a single yellow/green wire coming from the top of it. If you replace this sensor make sure to use a good liquid gasket material on the threads when reinstalling. I do not think (but not sure) it transmits/receives a signal to/from the ECU??

As far as trying to bypass other temp sensors, I would not recommend it. All other temp sensors do tie in to the ECU.

 

[comtec]

There are two temp sensors in that location. The one that goes directly into the thermostat cover is the radiator fan control sensor. The temperature gauge sending unit is behind that more near the the engine.

 

[jaffaz32]

Thanks for your help.

So it turns out i'm a numpty.

I have ordered and... removed the wrong sensor.

Attached is a pic, which one is which sensor?

The manual is very confusing, there was a great thread on the forum with a pic to the fan switch which helped me realised i had removed the wrong one so i looked further.

I think the one i needed to remove looks like a mini spark plug, what i mean by that is it plugs into the harness like a spark plug would, just presses on top with a single cable.

 

[redbird92]

The small one is for the Gauge, the other one is for the radiator fan turn on

We stock them if you need

ben

 

[jaffaz32]

It's Fixed.......



In case anyone else has the same symptoms.

My car would appear to take ages to warm up on the temp guage and i mean ages 10's mins. Then on a drive the temp guage would drop to around only two bars on the guage and driving it a little harder would raise the temp guage to usual position and this is a long.... drive in normal tempretures outside. The Guage slowly took worse taking longer to move.

I tried replacing the Thermostate as i thought this was the problem at first. It was not the Thermostate.

The problem was the Guage sender which is just to the left but below the throttle body, it is like a mini spark plug as the plug just pulls off and pushes on with no clips and only one wire. the sensor is very easy to remove and you should loose too much coolant doing it but check after wards!! to make life easier a deep socket is the trick to remove it as although it's easy to get to there isn't much room for a spanner and you wont fit a usual socket on it as it's a long sensor.

Hope this helps someone out as i done allot of searching and still wasnt sure this would solve the problem but it has.

 

[pgilliam1]

Thanks for posting your results - other DIY thread posters should/could/might learn from your consideration :wink:.