Temp Sensors?

[work-shy-wanabe]

Where are the temp sensors that control the fans? How do you get at them?

[Steve_T]

The sensor is in the rad iirc, however be careful if you disconnect it to get the fans going, as the ECU will assume the engine is cold with the sensor disconnected and fuel accordingly. The extra fuel can kill your cats (standard map is pretty rich as it is!). A common cause for the fans not working is that terminals in the white connectors to the fans get corroded, preventing power from reaching the fans.

Steve.

[SI-PEN]

I thought the temp sensor for the fans was fixed to the steel pipe under the front F1 trim panel?

[work-shy-wanabe]

I cleaned out the connecters on the fans and covered them in WD40. Seams to be okay now.

I couldnt find any sensors on the rad. I was trying to trace the wires from the fans. They go into the wing but I then lost sight of them. There looks like theres a little panel on the inside of the wheel arch which I could remove for a better look.

Theres a sensor under the cover thing labeled as temp sensor, but I think that the sensor for the temp gauge. Cleaned that out anyway which may have helped.

I could really do with a workshop manual!

[Captain Beaky]

work-shy-wanabe said:

I could really do with a workshop manual!

Take a look at this thread

[jon h]

work-shy-wanabe said:

I cleaned out the connecters on the fans and covered them in WD40. Seams to be okay now.

I couldnt find any sensors on the rad. I was trying to trace the wires from the fans. They go into the wing but I then lost sight of them. There looks like theres a little panel on the inside of the wheel arch which I could remove for a better look.

Theres a sensor under the cover thing labeled as temp sensor, but I think that the sensor for the temp gauge. Cleaned that out anyway which may have helped.

I could really do with a workshop manual!

If by "the cover thing" you mean the "F1" cover, between the engine and rad, then yes, that is the temp. sensor. There are 2 connections under there, going into the steel "swans neck" pipes:

There is a capillary tube with a spiral protective wire wound round it. This is for the temperature dial on the dash.

There is an electrical connection which is the temp sensor for the ECU. It is the ECU which turns the fans on. The first comes on at about 91 degrees, the second at about 95. (The temp shown on the dash will be higher as the dial tends to over-read due to the fact that the capillary tibe from the sensor runs past the off-side manifold on route to the dial!)

One of the cheapest and best improvements which can be made to this system is to install a cooling chip from TCS, about £65.00 This lowers the temp at which the fans come on. It is a 10 minute job to install.

Jon H

[work-shy-wanabe]

Thanks for clearing that up for me John. I have 2 new temp sensors that came with the car, one small and one big. Wheres the second big sensor?

Will take a look at the other thread about manuals.

[byker28i]

Yuo have mail

[work-shy-wanabe]

First fan comes on just below 100, and the second comes on just above 100. This the norm? Looks like its fixed..................for now.

Will check email when I get home.

Edited by work-shy-wanabe on Monday 5th March 16:10

[Steve_T]

Which temp gauge are you looking at - the one on the dash can be 10oC out.

[work-shy-wanabe]

The one on the dash, is there another?

[work-shy-wanabe]

Where the big sensor located?