V6 odd overheat?

[scouseeric]

Originally Posted by Dantheman

My first post as the new owner of a 2003, 2.5 V6 Conoisseur, with 41,500 miles.

Enjoying the car very much but a few things need sorting out, which, while searching this brilliant forum, are common issues (bonnet open light comes on over 50mph, some rainwater dripping behind the front passenger side tyre - a blockage somewhere i am guessing).

I have also read how to use the on board computer and using test 7.0 i drove around observing the temperature readings. Normal temp while driving around town (not motorway) seems to be between 93C - 97C. While stopping at traffic light, temp will go over 100C and I can hear the fan switch on. Once I start to drive and the temp goes below 100C, the fan turns off.

While driving I did not have the AC on - as I have read it is normal for fan to be on when running AC.

As a novice (not mechanical at all) I think the car is running a bit too hot - even the interior of the car appears to be a bit on the warm side.

Also, when I go out of the car, I can smell near the grill a faint "hot smell" - if that makes sense. Not a burning smell, but I would rather there be no smell.

It appears to me that the radiator is new (or is certainly the cleanest one I have seen, as its completely "silver colour". )

Could someone please advise me what should normal temp readings be for the 2.5 V6?

If it is running hot - could this be due to a faulty thermostat? Or perhaps it needs new coolant? Or anything else?

Thanks very much.

Sounds as if your car is running spot on i would say!


Eric

[stocktake]

Originally Posted by stocktake

Best thing to do is enter the on board diagnostics setup and go to the temperature read out, it will give you accurate temps

Originally Posted by River Clyde Connie

Enter the what?

a) Put key into ignition and turn it to position 1 (instruments activated).
a2) If you intend driving with diagnostic mode active, start the engine now.
b) Press and hold the trip reset button. This is the button sticking out near the speedometer.
c) After a few seconds your LCD display will show "test 1.-"
d) Immediately press trip the reset button every half second until you get to "test 19.-" and release. (19.0 allows access to diagnostic mode)
e) The display will now show alternating "Log 1 -on" / "Log 1 -off"
f) While it shows "Log 1 -off" press the reset button and. .
g) With no delay press repeatedly within a half second until you reach no 7.0 and release,
this will then show the live engine temp in deg C

094 = 94 degC

next time you turn the ign off the diagnostics will reset to normal readout

There are many more On board Diagnostics you can carry out

[SD1too]

Originally Posted by buddydavis

Check the fan, for 2.5v6 (w/ aircon off):
1. Slow fan - 106 -112C
2. Mid fan - 112-118C
3. Fast fan - 118 above (max 127C)

I don't know where you got these figures but they're incorrect I'm afraid.

The official Rover data for a 3 speed fan on the KV6 engine is as follows:

Slow speed: on at 100, off at 96.
Medium speed: on at 106, off at 102.
Fast speed: on at 112, off at 108.

Simon.

[stocktake]

I can concour with Simon, his figures are correct for the three speed KV6 petrol fan

[sjc]

What would they be if the fan is upgraded to a Jules 2 speed?

[SD1too]

Originally Posted by sjc

What would they be if the fan is upgraded to a Jules 2 speed?

That's a complicated question. From a recent thread it seems that the low speed remains unchanged but the medium speed control signal now runs the 2 speed motor at fast speed. The fast speed control signal is disconnected. However as I haven't seen any rotational speed figures for any 2 speed fan it's impossible to make a judgement whether the modified fan performance is compromised or improved. It is true to say though that the current replacement MG Rover 2 speed and Kenlowe systems offer a much longer life since neither suffers the brush problem of the original 3 speed design (as far as we know at present).

Simon.