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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 12-26-2008, 05:37 AM
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Snareman Snareman is offline
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Location: Ohio
 
Join Date: Nov 2006
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Mein Auto: 435, Grand Cherokee
Anyone notice how fast the cars heat up in the winter?

With past cars you'd have to wait until the temp gauge moved from its "cold" position all the way over to the left before you could hope to get any heat out of the vents. It seems that with BMWs though that I'm getting warm air from the vents within just minutes of starting the car, even before the gauge has moved. I don't know if they divert some warm air somehow or what, but its always nice. Same goes for the seat heaters. My but starts getting warm a long time before it did in my G35.
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  #2  
Old 12-26-2008, 05:48 AM
roadkillrob roadkillrob is offline
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Mein Auto: 325CIC, 335CIC
One thing is that you have an oil temp guage and the heating system uses the coolant to heat the interior of the car, the coolant will get warm much quicker then the oil, but yes it does heat up fast, most likely because it is a turbo car and gernerates a lot of heat at any time including getting up to temp!
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  #3  
Old 12-26-2008, 06:27 AM
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BerkleyBMW BerkleyBMW is offline
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The seat heaters are the quickest of any car I have had.
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  #4  
Old 12-26-2008, 06:33 AM
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AzNMpower32 AzNMpower32 is offline
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Mein Auto: 2006 325i sport
The modern BMWs use an electric coolant pump which allows the vehicle's coolant to circulate and warm up quicker than a conventional pump.

In vehicles equipped with EfficientDynamics, there are also active aerodynamics, where the slats inside the grille remain shut to allow the engine to warm up quickly, and only open when additional air is needed to cool the motor. This improves aerodynamics and reduces fuel consumption.
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  #5  
Old 12-26-2008, 06:56 AM
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DSXMachina DSXMachina is offline
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Mein Auto: 335i E92 TiAg 6MT ED
Uh uh guys, here's why the heater output occurs more quickly than previously: Newer cylinder head coolant passageways combined with thermostats which allow coolant flow throughout the head (until it's warmed up to the proper temperature), and pumps which are arranged to pump that quickly warming coolant to the heater core are the reason.
In years past the coolant would circulate through the 'cold' engine (block and cylinder head) and take much longer to warm up. Then the t'stat would open and the freezing cold coolant in the radiator would slug the block and the whole process would have to start over. Some thermostats today are controlled by-are you ready for this- the ECU! No longer do they just sit there dumbly expanding and contracting based on the coolant temperature. Now the ECU can precisely control the metering to help prevent overheating, etc.

Last edited by DSXMachina; 12-26-2008 at 06:57 AM. Reason: clarification
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  #6  
Old 12-26-2008, 07:28 AM
roadkillrob roadkillrob is offline
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I would agree, my E46 seat heaters where fast also, BMW seat heaters are very quick compared to my Lexus or Volvo, which is nice on a cold day!
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  #7  
Old 12-26-2008, 08:08 AM
AndreyATC AndreyATC is offline
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Mein Auto: 2008 E92 335i
Quote:
Originally Posted by BerkleyBMW View Post
The seat heaters are the quickest of any car I have had.
+1

Also nice read from DSXMachina
I was also wondering why my car heats up so quickly in the winter
My FX takes forever to warm up anything
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  #8  
Old 12-26-2008, 08:47 AM
ProRail ProRail is offline
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Mein Auto: 1999 BMW 528A--165K
Quote:
Originally Posted by AzNMpower32 View Post
The modern BMWs use an electric coolant pump which allows the vehicle's coolant to circulate and warm up quicker than a conventional pump.

In vehicles equipped with EfficientDynamics, there are also active aerodynamics, where the slats inside the grille remain shut to allow the engine to warm up quickly, and only open when additional air is needed to cool the motor. This improves aerodynamics and reduces fuel consumption.
My 1999 528 provides cabin heat quicker than any car I ever had before. Also retains engine heat when parked longer than anything lese I ever had.
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  #9  
Old 12-26-2008, 08:50 AM
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Pat_X5 Pat_X5 is offline
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Yeah, +1 for seat heaters in Southern California - even sunny 45 degree weather I appreciate it!
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  #10  
Old 01-24-2013, 03:37 PM
redline325 redline325 is offline
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Location: Germantown, WI USA
 
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Mein Auto: 2006 330xi
fast heat sometimes, sometimes not

My 2006 330xi had fantastic quick heat on cold mornings untill the outside temp went below about 25 degrees. The fan speed increases but blows ice cold air for about 15 minutes or more. As soon as outside temp gets above 25 degrees I can hear the electric pump run and heat is there within 1-2 minutes. any ideas what could be wrong?

Marc
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