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20th October 2020, 22:01 | #11 | |
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You could always fit it your self just follow the link below. https://www.the75andztclub.co.uk/for...d.php?t=216734
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20th October 2020, 22:49 | #12 |
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Heh, yeah I saw that but I have nowhere undercover and it's too much of a faff getting the stuff off
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2005 Connoisseur 2.5 auto SE Tourer in BRG with Sandstone Beige and Black piping interior (the 2nd of only 7 Rover 75s produced 5th November 2004, and it’s the 244th of 303 facelift British Racing Green 75 tourers built worldwide). All I've done is add Rover walnut gear knob and handbrake... 2016 Vauxhall Viva SL (Father Jack) "assisted manual" (auto) in purple. Going rusty underneath already... |
22nd October 2020, 13:44 | #13 |
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Well the garage fitted it, left the car running for an hour, no obvious issues, and on the way home up goes the temp gauge to 12 o'clock and the engine overheat warning comes on... I turned the heating up and down it went, fluctuating between 9 and 10 o'clock.
Got home, did the demist check and the fan ran continuously. Left it running with the aircon on cool and it continually fluctuated (quickly) between 9 and 10 o'clock. Turned the engine off and the fan kept going for a couple of minutes. Any more ideas?
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2005 Connoisseur 2.5 auto SE Tourer in BRG with Sandstone Beige and Black piping interior (the 2nd of only 7 Rover 75s produced 5th November 2004, and it’s the 244th of 303 facelift British Racing Green 75 tourers built worldwide). All I've done is add Rover walnut gear knob and handbrake... 2016 Vauxhall Viva SL (Father Jack) "assisted manual" (auto) in purple. Going rusty underneath already... |
22nd October 2020, 14:40 | #14 |
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Faulty coolant temp sender? False high reading would trigger cooling fan.
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22nd October 2020, 21:00 | #15 |
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Hi Pete,
You still appear to have a fault causing overheating. Has anybody drained and refilled the coolant recently? Has K-Seal been added to your engine? Simon
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22nd October 2020, 22:17 | #16 |
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No, nothing like that has happened.
It's an interesting point from rovertone. The gauge goes up and down so fast it makes sense that the sensor is faulty. I assume it's this one: https://www.dmgrs.co.uk/products/oem...45-75-zr-zs-zt At that price it's worth changing. Where is it? Nestling somewhere awkward I imagine... How about the diagnostic trick where you display the temperature on the dash? If the numbers go up and down too fast that might point to a faulty sensor?
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2005 Connoisseur 2.5 auto SE Tourer in BRG with Sandstone Beige and Black piping interior (the 2nd of only 7 Rover 75s produced 5th November 2004, and it’s the 244th of 303 facelift British Racing Green 75 tourers built worldwide). All I've done is add Rover walnut gear knob and handbrake... 2016 Vauxhall Viva SL (Father Jack) "assisted manual" (auto) in purple. Going rusty underneath already... |
23rd October 2020, 04:33 | #17 |
I really should get out more.......
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Surprised you haven't already checked the OBD temp as that's the "real" one - here it is: https://www.the75andztclub.co.uk/for...d.php?t=308576
Yes that's the right sensor, located in one of the most inaccessible places: in the engine's V right beside the thermostat. Regards |
23rd October 2020, 09:00 | #18 | ||
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Quote:
1 Here you can see with the manifolds removed marked by purple dots. 2
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23rd October 2020, 09:20 | #19 |
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Hi Pete,
Whilst I understand that the prospect of a cheap replacement part has its attractions, from what you've told us I doubt that the coolant temperature sensor is faulty but you might have a dirty electrical connection where the sensor lead meets the loom. You'll find it tucked underneath the rear of the throttle body. The wiring colours are pink/green and pink/black. Here's my reasoning:
I'd be looking for an air lock or loss of pressurisation due to, for example, worn seals on the expansion tank cap. If you genuinely haven't lost a drop of coolant during these episodes then check the connector I mentioned. As Vitesse has pointed out, you won't want to renew the sensor without incontrovertible proof. There's a lot of dismantling involved. Simon
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23rd October 2020, 16:20 | #20 |
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I now have a thirty minute video of the diagnostic readout thingy...
I started recording when the gauge reached just about 9 o'clock and the readout said 78. The climate control was off. At 5 minutes it says 99. At 8 minutes it says 106 and the high speed fan starts. At 15 minutes it says 114 (by this point I was bored and whacked the aircon on full cold to load the engine a bit). At 16 minutes it says 116 and at that moment the gauge shifted off 9 o'clock to 9:30. At 16 minutes and 30 seconds it says 117 and the gauge moves to 10 o'clock. At 17m 30s it says 118 and the gauge moves near to 11 o'clock. At 20m it says 119 and the gauge is past 11 o'clock. It's going between 118 and 119. Now I get nervous and whack the heating up full on econ. After a minute the temperature decreases gradually. After 28 minutes it's down to 107 and I give up. Any thoughts?
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2005 Connoisseur 2.5 auto SE Tourer in BRG with Sandstone Beige and Black piping interior (the 2nd of only 7 Rover 75s produced 5th November 2004, and it’s the 244th of 303 facelift British Racing Green 75 tourers built worldwide). All I've done is add Rover walnut gear knob and handbrake... 2016 Vauxhall Viva SL (Father Jack) "assisted manual" (auto) in purple. Going rusty underneath already... |
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