Temp Sensor

Imola02 · Thu, Dec-16-2010, 09:15:51 PM

Please help me!! When I turn my heater on my temp gauge dips to the first dot. Ive change my T-stat twice thinking it was stuck open. The gauge also never gets to high noon even when the heater is off. I live in Dallas so its getting cold. I noticed in the summer that the needle would move to the second dot but it would come back to high noon. Any help is appreciated. 2002 Imola M3 95000miles

mpower22 · Thu, Dec-16-2010, 10:58:55 PM

Are you still getting sufficient heat from your vents?

Imola02 · Thu, Dec-16-2010, 11:06:05 PM

The heater works great.

mpower22 · Thu, Dec-16-2010, 11:11:44 PM

Ok, check your coolant level, make sure the bobber in the reserve tank is up to the top. If the level is good, its def the temp sensor. To change it, you need to remove the intake manifold. It's a very inexpensive part, just involved process to change one little sensor.

Imola02 · Thu, Dec-16-2010, 11:33:12 PM

Thanks for the info. Do you think the Bentley manual will help me in removing the intake?

Imola02 · Thu, Dec-16-2010, 11:33:37 PM

Is there a DIY on here?

mpower22 · Fri, Dec-17-2010, 12:32:07 AM

Yes, Bentley should help, but I don't have one. There is a DIY for the intake manifold somewhere around here. You need CV boot clamp pliers to get the rings off. After that its just disconnecting hoses here and there. There's 2 or 3 on the bottom of it. Not complicated, just time consuming. After that - voila - the sensor is there for the taking.

Imola02 · Fri, Dec-17-2010, 02:25:34 PM

Thanks for all your help....I will tackle this in a couple of weeks. Why does the needle dip when I turn the heater on?

Thu, Dec-16-2010, 09:15:51 PM	#1
Imola02 Registered User Join Date: Jun 2010 Posts: 30 Reputation: 0	Temp Sensor Please help me!! When I turn my heater on my temp gauge dips to the first dot. Ive change my T-stat twice thinking it was stuck open. The gauge also never gets to high noon even when the heater is off. I live in Dallas so its getting cold. I noticed in the summer that the needle would move to the second dot but it would come back to high noon. Any help is appreciated. 2002 Imola M3 95000miles

Thu, Dec-16-2010, 10:58:55 PM	#2
mpower22 10-Year Member Join Date: Dec 2002 Age: 31 Posts: 2,497 In the garage: '13 MERCEDES-BENZ ML350 '09 TOYOTA RAV4 '03 BMW M3 Reputation: 0 Location: Maryland	Are you still getting sufficient heat from your vents? __________________ ///M3 - Dream Car: Acquired 2003 M3Laguna Seca Blue/6MT/Black Leather Cloth Interior/Full [CSL] Exhaust/evolve-R Original Owner, Custom Built - PDC, Moonroof, Bi-xenons, Brushed Aluminum Trim, Bluetooth ULF European - Rotors (F&R), Bumper, Mirrors, Warning Triangle, Console, First Aid Kit, Fire Extinguisher OE LED Conversion/Outer Ring Mod \| V1 Hardwired/Ashtray Display \| 3M 35% Tint \| Diamond S600s, JL 10W3v3, HD900/5

Thu, Dec-16-2010, 11:11:44 PM	#4
mpower22 10-Year Member Join Date: Dec 2002 Age: 31 Posts: 2,497 In the garage: '13 MERCEDES-BENZ ML350 '09 TOYOTA RAV4 '03 BMW M3 Reputation: 0 Location: Maryland	Ok, check your coolant level, make sure the bobber in the reserve tank is up to the top. If the level is good, its def the temp sensor. To change it, you need to remove the intake manifold. It's a very inexpensive part, just involved process to change one little sensor. __________________ ///M3 - Dream Car: Acquired 2003 M3Laguna Seca Blue/6MT/Black Leather Cloth Interior/Full [CSL] Exhaust/evolve-R Original Owner, Custom Built - PDC, Moonroof, Bi-xenons, Brushed Aluminum Trim, Bluetooth ULF European - Rotors (F&R), Bumper, Mirrors, Warning Triangle, Console, First Aid Kit, Fire Extinguisher OE LED Conversion/Outer Ring Mod \| V1 Hardwired/Ashtray Display \| 3M 35% Tint \| Diamond S600s, JL 10W3v3, HD900/5

Fri, Dec-17-2010, 12:32:07 AM	#7
mpower22 10-Year Member Join Date: Dec 2002 Age: 31 Posts: 2,497 In the garage: '13 MERCEDES-BENZ ML350 '09 TOYOTA RAV4 '03 BMW M3 Reputation: 0 Location: Maryland	Yes, Bentley should help, but I don't have one. There is a DIY for the intake manifold somewhere around here. You need CV boot clamp pliers to get the rings off. After that its just disconnecting hoses here and there. There's 2 or 3 on the bottom of it. Not complicated, just time consuming. After that - voila - the sensor is there for the taking. __________________ ///M3 - Dream Car: Acquired 2003 M3Laguna Seca Blue/6MT/Black Leather Cloth Interior/Full [CSL] Exhaust/evolve-R Original Owner, Custom Built - PDC, Moonroof, Bi-xenons, Brushed Aluminum Trim, Bluetooth ULF European - Rotors (F&R), Bumper, Mirrors, Warning Triangle, Console, First Aid Kit, Fire Extinguisher OE LED Conversion/Outer Ring Mod \| V1 Hardwired/Ashtray Display \| 3M 35% Tint \| Diamond S600s, JL 10W3v3, HD900/5

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Thu, Dec-16-2010, 11:06:05 PM	#3
Imola02 Registered User Join Date: Jun 2010 Posts: 30 Reputation: 0	The heater works great.

Thu, Dec-16-2010, 11:33:12 PM	#5
Imola02 Registered User Join Date: Jun 2010 Posts: 30 Reputation: 0	Thanks for the info. Do you think the Bentley manual will help me in removing the intake?

Thu, Dec-16-2010, 11:33:37 PM	#6
Imola02 Registered User Join Date: Jun 2010 Posts: 30 Reputation: 0	Is there a DIY on here?

Fri, Dec-17-2010, 02:25:34 PM	#8
Imola02 Registered User Join Date: Jun 2010 Posts: 30 Reputation: 0	Thanks for all your help....I will tackle this in a couple of weeks. Why does the needle dip when I turn the heater on?