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13th November 2019, 12:02 | #1 |
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2002 V6 2.5 Join Date: Apr 2019
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Operating Temperature
Hi all. Over recent months I have had new belts, thermostat, water pump, 2 speed fan and radiator. Temp is rising to 110 in stop start traffic before high speed fan brings it down. Operates at 92-97 in free flowing traffic. Getting cool air in passenger footwell and hot in drivers. Any idea what could be causing 110 operating temp and is this a problem?
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13th November 2019, 12:10 | #2 |
I really should get out more.......
Rover 75 Saloon Join Date: Jul 2011
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Sure you don't mean low speed fan? All fairly normal, the fan's doing it's job but your heater matrix is probably blocked.
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13th November 2019, 13:40 | #3 | |
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
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I beg to differ Mike. The slow speed fan should run well before 110 degrees is reached.
Quote:
First of all and most importantly, your profile says that you haven't got a car. If we are to help you with any degree of accuracy you need to tell us which engine you have. This is essential information in order to diagnose cooling system problems. So please could you correct your profile straight away. Please don't tell us in a posting and leave your profile as it is. Many thanks. To answer your question in general terms:
Yes, it's a problem. Simon
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"Whatever is rightly done, however humble, is noble." Sir Henry Royce. Last edited by SD1too; 13th November 2019 at 13:43.. |
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13th November 2019, 13:47 | #4 |
I really should get out more.......
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Sorry Simon misread the post to mean 100. Specsavers ?
Mike |
13th November 2019, 15:40 | #5 |
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2.5 V6. Cooling fans coming on at 100 and 106.in traffic. It will cool down to 92 via fans and driving. Then will go back to 105 plus when it hits traffic again. Sometimes it will go down from 105 to 92 in seconds. I've also had it sat on the driveway at home and the low speed fan at 100 soon cools it back to 92. So it seems to do this high temperature thing only whilst driving and when in lots of stop start driving.
Last edited by Dave6; 13th November 2019 at 15:47.. |
13th November 2019, 15:47 | #6 |
This is my second home
75 Tourer 2.5 Auto, 1.8T, 75V8ZT Join Date: Jun 2007
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So what is the problem?
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13th November 2019, 20:09 | #7 | |
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Quote:
The heat imbalance from each side of the cab heater is a sign that the matrix is silted up. A hosepipe back-flush with the inlet/outlet hoses detached from the system may well fix it. Did the reported temperature/fan activity start when the new fan was installed? Is it an MGR fan or after-market? TC |
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14th November 2019, 07:15 | #8 |
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Thank you for the responses. The two speed fan system is working at the correct temperatures according to the OBD so perhaps this is a pressurisation issue. I will buy a new expansion tank cap and if that doesn’t work I will get a reputable garage to refill and bleed the coolant to eradicate any possible air lock. Lots of niggly problems for what otherwise is a good car to drive.
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14th November 2019, 07:43 | #9 | ||
Doesn't do things by halves
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Quote:
Quote:
Simon
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"Whatever is rightly done, however humble, is noble." Sir Henry Royce. |
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14th November 2019, 09:40 | #10 |
This is my second home
Rover75 and Mreg Corsa. Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
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