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Old 23rd May 2021, 18:58   #21
vitesse
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And not to forget the question of fuel economy. My V6 runs at a more or less constant 95 degs, confirmed by not only the onboard diagnostics but by Torque Pro.

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Old 23rd May 2021, 19:07   #22
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I don't know where is the problem.
I will try to purge again because the last time, I only purged part of the coolant(5 liters).

Last edited by Shuriken_57; 23rd May 2021 at 19:11..
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Old 23rd May 2021, 19:39   #23
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Quote:
Originally Posted by vitesse View Post
And not to forget the question of fuel economy. My V6 runs at a more or less constant 95 degs, confirmed by not only the onboard diagnostics but by Torque Pro.
Regards
95°C! Isn't it a tad high? Are you fuelling with full E85?
If so such a difference between yours and mine looks rather weird.
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Old 23rd May 2021, 19:42   #24
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Here is an example of a sequence a few days ago between 77 and 80° while cruising on an A-road (the 6,410 revs was a kick-down in sport mode!). Mind that the mpg (l/100 km) is overstated. In fact I'm doing a 22.6 mpg (12.5 l/100 km) average in the space of 4 years, but Torque Pro can't cope correctly with E85. The rather freezing temperature is a mocked one because of the 24k Ohms resistor which is tricking the ECU to give more fuel and comply with E85 stoechiometric ratio (1:14.7 instead of 1:9.7 for E5).


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Rover 75 V6 2.5 Auto Connie born 1 July 1999, 24 kOhms resistor, 10 kOhms manual starter, full E85, modified airbox, full derestricted SS exhaust line, power & torque remap -> 202 bhp
  • This vehicle was the 7,517th 75 to run off the production line, out of 112,381
  • This vehicle was the 1,190th 75 2.5 V6 Contemporary to be made out of 8,214
  • This vehicle was the 2,032nd 75 in Atlantic Blue Pearlescent (code: JEY) to be made out of 2,572 Atlantic Blue Pearlescent 75s

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Old 23rd May 2021, 19:48   #25
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Quote:
Originally Posted by Dorchester2 View Post
Here is an example of a sequence a few days ago between 77 and 80° while cruising on an A-road (the 6,410 revs was a kick-down in sport mode!):


I don’t think it uses e85 fuel but I will try to drive with E10 to see a difference or not.
Has your thermostat been replaced?

Last edited by Shuriken_57; 23rd May 2021 at 19:50..
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Old 23rd May 2021, 20:00   #26
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I don’t think it uses e85 fuel but I will try to drive with E10 to see a difference or not.
Has your thermostat been replaced?

Not at all. All is 22 year old genuine Rover but the resistors.
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Rover 75 V6 2.5 Auto Connie born 1 July 1999, 24 kOhms resistor, 10 kOhms manual starter, full E85, modified airbox, full derestricted SS exhaust line, power & torque remap -> 202 bhp
  • This vehicle was the 7,517th 75 to run off the production line, out of 112,381
  • This vehicle was the 1,190th 75 2.5 V6 Contemporary to be made out of 8,214
  • This vehicle was the 2,032nd 75 in Atlantic Blue Pearlescent (code: JEY) to be made out of 2,572 Atlantic Blue Pearlescent 75s
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Old 24th May 2021, 06:49   #27
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Quote:
Originally Posted by Shuriken_57 View Post
I will try to purge again because the last time, I only purged part of the coolant(5 litres).
Hi Brahim,

With your car's problems it is important that you carry out procedures fully. I recommend that you drain your cooling system completely, including the cylinder block drain plug at the left hand bank, and follow the MG Rover procedure exactly.

Dorchester2 has modified his engine so a comparison isn't valid.

There's no point in buying E10 fuel Brahim. It isn't going to make your engine run 10 degrees hotter.

Simon
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Old 24th May 2021, 08:26   #28
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Quote:
Originally Posted by Dorchester2 View Post
95°C! Isn't it a tad high? Are you fuelling with full E85?
If so such a difference between yours and mine looks rather weird.
Use standard 95 octane fuel which at the moment contains 5% ethanol. (E10 is being introduced during the summer with of course no views of the common motorist being heard).

We run four V6s here, three are used on a daily basis and all record roughly the same running temperature 92 - 95 degs, run with ACC active. I believe the standard thermostat opening temperature is 88 degs, so I'm quite happy with 92 - 95 especially as several others have confirmed the same sort of results.

Keep well
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Old 24th May 2021, 08:26   #29
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Quote:
Originally Posted by SD1too View Post
Hi Brahim,

With your car's problems it is important that you carry out procedures fully. I recommend that you drain your cooling system completely, including the cylinder block drain plug at the left hand bank, and follow the MG Rover procedure exactly.

Dorchester2 has modified his engine so a comparison isn't valid.

There's no point in buying E10 fuel Brahim. It isn't going to make your engine run 10 degrees hotter.

Simon
I'll try this Thanks you.
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Old 24th May 2021, 11:24   #30
Dorchester2
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Quote:
Originally Posted by vitesse View Post
Use standard 95 octane fuel which at the moment contains 5% ethanol. (E10 is being introduced during the summer with of course no views of the common motorist being heard).

We run four V6s here, three are used on a daily basis and all record roughly the same running temperature 92 - 95 degs, run with ACC active. I believe the standard thermostat opening temperature is 88 degs, so I'm quite happy with 92 - 95 especially as several others have confirmed the same sort of results.

Keep well
Good for you.
The reason why I thought you were fuelling with E85 is that you're living in Sweden. But I remember that the price is now less attractive.
Anyway why fearing E10? ... I can't understand. But that's another question and I don't want to begin an argument...
Keep you safe as well. Always glad to hear of you.
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Rover 75 V6 2.5 Auto Connie born 1 July 1999, 24 kOhms resistor, 10 kOhms manual starter, full E85, modified airbox, full derestricted SS exhaust line, power & torque remap -> 202 bhp
  • This vehicle was the 7,517th 75 to run off the production line, out of 112,381
  • This vehicle was the 1,190th 75 2.5 V6 Contemporary to be made out of 8,214
  • This vehicle was the 2,032nd 75 in Atlantic Blue Pearlescent (code: JEY) to be made out of 2,572 Atlantic Blue Pearlescent 75s
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