MINI2

crunchie · Dec 12th, 2002, 05:15 PM

Advice Please.
Before I ring my dealer
I have noticed on start-up and for about half a mile the temperature gauge rises, to half way between normal and hot, then settles at the normal.

(Weather has been near freezing lately) could be something to do with the thermostat opening.

Has anybody else experienced this?

Thanks in advance for any replies.

Crunchie

Dec 12th, 2002, 06:50 PM

I think I would get this checked out. Usually, at least as far as I know, the valve from the engine to the radiator is opened by the same sensor that gives you the engine temp on the dash. Your mini might actually be overheating, and then cooling down to normal. But then again, it might just be the gauge.

I would get it checked out, better safe than sorry.

-Andrew

cosworth · Dec 12th, 2002, 09:33 PM

Yeah, I think Apex may be right. Mine comes up slow and steady to the halfway mark, and stays there. Possibly a sticking thermostat. Take her in for a check.

sjbartnik · Dec 13th, 2002, 09:12 AM

The coolant thermostat (as in pretty much all cars) is a completely mechanical device and is not controlled by any type of sensor. It is a thermostatic device that is totally controlled by the temperature of the coolant.

That said, you should certainly get it checked out. Perhaps the thermostat is sticking and is not opening on time, or perhaps you just have a faulty gauge or sensor.

here2help · Dec 13th, 2002, 05:31 PM

The thermostat is located in the cylinder head and is retained in a plastic housing located at right side
of the engine (viewed from the front of the car).
The thermostat begins to open at 89-92 °C and is
fully open at 103 °C. The thermostat housing also incorporates the cooling system pressure cap on a
MINI ONE and MINI COOPER.
The engine temp guage is also damped..The needle will remain in the straight up(12o'clock position)when the cooling systems is between 76 °C and 112 °C.
So any temp change above 112 °C and the guage goes into the red, and any temp below 76 °C and it shows cold..
Hope this info helps

Dec 13th, 2002, 06:10 PM

Quote:

sjbartnik The coolant thermostat (as in pretty much all cars) is a completely mechanical device and is not controlled by any type of sensor. It is a thermostatic device that is totally controlled by the temperature of the coolant.

Yeah, thats what I meant..You just said it more accurately.

-Andrew

loder · Dec 14th, 2002, 12:15 AM

except it stayed at about 3/4. Dealer says it is a faulty gauge.

crunchie · Dec 14th, 2002, 10:58 AM

I Have got the car booked in for friday 20th, will post my findings.

Thanks
Crunchie

Dec 12th, 2002, 05:15 PM	#1
crunchie MINI2 Regular Join Date: Apr 2002 Location: gloucester Local Time: 10:17 PM Posts: 176 Offline	Is Temperature Gauge OK? Advice Please. Before I ring my dealer I have noticed on start-up and for about half a mile the temperature gauge rises, to half way between normal and hot, then settles at the normal. (Weather has been near freezing lately) could be something to do with the thermostat opening. Has anybody else experienced this? Thanks in advance for any replies. Crunchie

Dec 12th, 2002, 09:33 PM	#3 (permalink)
cosworth MINI2 Regular Join Date: Nov 2002 Location: New Jersey Local Time: 04:17 PM Posts: 204 Offline	Yeah, I think Apex may be right. Mine comes up slow and steady to the halfway mark, and stays there. Possibly a sticking thermostat. Take her in for a check. 2002 MCS, DS/B/BBS, Sport, Prem, Cloth, 17's 1969 Morris Cooper MK2, Tartan Red/Black, 998cc, Twin HS2's

Dec 13th, 2002, 09:12 AM	#4 (permalink)
sjbartnik MINI2 Senior Join Date: Jul 2002 Location: Virginia Beach, VA Local Time: 05:17 PM Posts: 629 Offline	The coolant thermostat (as in pretty much all cars) is a completely mechanical device and is not controlled by any type of sensor. It is a thermostatic device that is totally controlled by the temperature of the coolant. That said, you should certainly get it checked out. Perhaps the thermostat is sticking and is not opening on time, or perhaps you just have a faulty gauge or sensor. Sean Bartnik 2003 MINI Cooper S

Dec 13th, 2002, 05:31 PM	#5 (permalink)
here2help MINI2 Senior Join Date: Sep 2002 Local Time: 09:17 PM Posts: 540 Offline	Info only.... The thermostat is located in the cylinder head and is retained in a plastic housing located at right side of the engine (viewed from the front of the car). The thermostat begins to open at 89-92 °C and is fully open at 103 °C. The thermostat housing also incorporates the cooling system pressure cap on a MINI ONE and MINI COOPER. The engine temp guage is also damped..The needle will remain in the straight up(12o'clock position)when the cooling systems is between 76 °C and 112 °C. So any temp change above 112 °C and the guage goes into the red, and any temp below 76 °C and it shows cold.. Hope this info helps

Dec 14th, 2002, 12:15 AM	#7 (permalink)
loder MINI2 Regular Join Date: Jun 2001 Local Time: 09:17 PM Posts: 175 Offline	same problem except it stayed at about 3/4. Dealer says it is a faulty gauge.

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Dec 12th, 2002, 06:50 PM	#2 (permalink)
L8 Apex Posts: n/a	I think I would get this checked out. Usually, at least as far as I know, the valve from the engine to the radiator is opened by the same sensor that gives you the engine temp on the dash. Your mini might actually be overheating, and then cooling down to normal. But then again, it might just be the gauge. I would get it checked out, better safe than sorry. -Andrew

Dec 13th, 2002, 06:10 PM	#6 (permalink)
L8 Apex Posts: n/a	Quote: sjbartnik The coolant thermostat (as in pretty much all cars) is a completely mechanical device and is not controlled by any type of sensor. It is a thermostatic device that is totally controlled by the temperature of the coolant. Yeah, thats what I meant..You just said it more accurately. -Andrew

Dec 14th, 2002, 10:58 AM	#8 (permalink)
crunchie MINI2 Regular Join Date: Apr 2002 Location: gloucester Local Time: 10:17 PM Posts: 176 Offline	I Have got the car booked in for friday 20th, will post my findings. Thanks Crunchie

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