Kv6 new thermostat leaks?

[SD1too]

Originally Posted by Dorchester2

What's wrong with slightly low-ish temperatures say around 80°?

Well first of all the engine was designed to run hotter than that. This isn't peculiar to the KV6, or even MG Rover, petrol engines for the UK climate have always been like this since I started driving.

The oil temperature will be affected via the oil cooler or conduction. It will be lower viscosity and therefore will not perform as intended.

Fuel consumption could well be higher. I experienced this recently when my city car's thermostat started opening early. Only the ECM manufacturer and MGR will know the exact relationship between coolant temperature and fuelling so claims that 80˚ coolant won't affect fuelling is doubtful and speculative.

Possible reduced heater maximum output (diesel owners have complained about this).

Originally Posted by MGtom91

The way I see it is although 80 is slightly lower than 'ideal' , it is within calibrated range of 75 to 115°, hot enough for the fuelling to be normal ...

• I'd say that 80˚ is more than "slightly" low Tom! It's 12 to 15˚ lower.
• The temperature gauge "normal" range has nothing to do with fuelling. It was programmed like that so that drivers wouldn't worry about normal variations in coolant temperature.

Simon

[MGtom91]

Can the inline thermostat mod made for the diesels be fitted to the petrol cars ?

[Arctic]

HI Tom
No inline is only for the diesel cars.

[MGtom91]

Originally Posted by Arctic

HI Tom
No inline is only for the diesel cars.

That's a pig, means I'm going to have to do this thermostat change... Again....and then hope I don't have another low temp or faulty part.

[SD1too]

Originally Posted by MGtom91

... I'm going to have to do this thermostat change... Again....and then hope I don't have another low temp or faulty part.

Hi Tom,

To stand the best chance of getting a 88˚ thermostat I'd recommend that you buy only from an X-Part agent (such as E Car Parts 01767 682900, Summit Garage 01384 259555, A.E. Wilcox 01454 294213). Try your utmost to get one of the Chinese modified housings with the four supporting legs.

Simon

[Dorchester2]

According to Torque monitoring, when cruising my KV6 engine is cooled on a relative large range of values from even 70/80° to 85/95° and always moving up or down even if slightly according situations.
As we all know it depends upon lots of factors: ambient temperature outside indeed, going uphill or downhill obviously, and motorways, country roads, towns or villages.
TBH I'm using the KV6 mainly on medium or long journeys (never less than 50km or 30 mls), and preferably outside towns & busy areas.
Never was I upset by low-ish temperatures say below 85°, rather reassured.
I don't want to see those temperatures flirting with the 3 digits.
Anyway in the huge French 1999 workshop documentation I've just received (10 kg!), as expected it reads that the thermostat initial aperture is done at 88 +/-2° and minimum at 96°. Fan speeds being: 1 at 100°, 2 at 106° & 3 at 112°, respectively stopping at 96°, 102° & 108°.
Besides to be kept out of trouble I'm always filling up every 2 or 3 year the coolant system with orange OAT fluid (MOTUL Inugel Optimal if available) protecting from -37° to +120° (I don't remember exactly the latter).
The engine is working a treat since 4 years.
At the last MOT (CT for us every 2 year) the pollution was absolutely nil, i.e. perfect & bang in the middle of the tiny range.
So no fuss to be done and no headache to be had...

[Shuriken_57]

Originally Posted by SD1too

Hi Tom,

To stand the best chance of getting a 88˚ thermostat I'd recommend that you buy only from an X-Part agent (such as E Car Parts 01767 682900, Summit Garage 01384 259555, A.E. Wilcox 01454 294213). Try your utmost to get one of the Chinese modified housings with the four supporting legs.

Simon

Hello Simon, i've baught an original thermostat from E car parts ( on eBay), but the température is around 82° too.
:hausser les épaules:

[biffa75]

Hi shuriken. Thanks for highlighting this. I was intending to buy my next thermostat from e car parts, if your reporting that these are also selling thermostats that operate at the incorrect temperature, then I won't be buying one from them.

Ill keep my thread up dated and reply here if I find a solution shuriken.

[MGtom91]

Maybe this has something to do with the Chinese versions? Wondering if the original part made in UK (but do not have the supporting lugs) will be the 88° and all Chinese variants are the lower temp.

[biffa75]

Shuriken -

The one you bought from e car parts - did this have the little supporting lugs on the housing?

Thanks
Rob