td5, timing cover bearing,replace fanbelt

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Again I must make the point, the temps of the EWPC are higher than the Nanocom readings - the D2 has the AC Condenser fan that kicks in with high temps based on the system readings. There is some conjecture re the kick in temps but again this is measured off the same feed as the Nanocom.

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The aircon fan according to Rave cuts in with the compressor at ambient/external temperatures above 28C as measured by the sensor in the grille.
I must note however that I have heard it running at temperature of 26C as indicated by the display in the aircon controller.
I know that one cold day climbing The Alpine way with auto air on at external 20C indicated, the engine temp reached 100C . When I turned off the aircon the temperature dropped which confirmed to me that the fan depends on the external temperature not the engine temperature.
Regards PhilipA.

thank you PhilipA,I didn't have the time to try the converson as the disco is used for my work this time,but i am retiring at the end of the month [again] so will have time to spluddel around.it looks very possible to do away with the timing case bearing alltogether although the span of the belt appears a long distance so i am not sure about that,I will wait until your further testing with the vfan refitted.thanks for taking the time.

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Originally Posted by PhilipA

I must note however that I have heard it running at temperature of 26C as indicated by the display in the aircon controller.

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There could be several reasons for this.

If A/C is on and ambient temperature went 28° or over, it will stay on until it drops to 25°, so 26° would be in the range that it would stay on.

There is also the roadspeed to take into account which also changes the "on off" of the condenser fan.

Then of course there is the engine cooling function which operates at different numbers again.

Cheers
James

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There could be several reasons for this.

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Yes I thought later that all thermostats must have hysteresis ie a gap between switching on and off to stop flutter.
I just bought a thermo switch for my caravan fridge with instructions on at 45C and off at 40C.
Regards PhilipA