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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 01-09-2014, 09:23 AM
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MP3_E46 MP3_E46 is offline
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More definitive warm up numbers

Real world tests here folks. It shows my ~17K 328i (NA straight six) takes an age to warm up and blow hot air.

Nipping out for lunch today I monitored from my garage to destination and the journey back after lunch (~15 mins later):

5 mins/ 2 miles there - vaguely hot air was blowing in footwell by arrival
5 mins 30s/ 2.2 miles back - hot air blowing in footwell, vaguely warn from dash vents

All vents were open, upper temp dial on full red and climate control set to 84F (max). Even with ~42F outside it didn't fully warm up.

Until engine temp is over about 200F I don't believe really hot air blows from the upper vents. Last night I noticed the OBD can show ~200F and the dash temp gauge not have moved so warm occurs before the dash gauge shows warm up has occured

Of course if you jump straight on a highway and go 80mph it'll heat up a lot quicker (poor engine!)



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  #2  
Old 01-09-2014, 09:32 AM
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cwinter cwinter is offline
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Are you suspecting a faulty system?

If it's in the 40s outside and I have the auto climate control set to 72F (where it usually sits) with the temp wheel set to hot of course (under the center vent), I get warm air blowing in the car as soon as I get out of the alley. That is, about driving 1/10th of a mile at 10 mph in first gear. One I toodled through the neighborhood and get the car in 3rd and 4th gear going around 40 mph the car is blowing hot air with reckless abandon. I hit the highway after about 5 miles and the car is well warmed up.

Last week it was 13F in the morning here and it took quite a bit longer to blow hot air, but still, by the time I got to the hwy the system was spitting hot air at full speed!
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  #3  
Old 01-09-2014, 09:38 AM
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MP3_E46 MP3_E46 is offline
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All seven of my BMWs and every larger engines car I've owned has been like this. I'd be interested to see data showing a large engine warmed up by the end of the street - it seems unlikely that I had seven bad BMWs in a row (six new from the factory).

The 'Auto' climate control mode turns the fan up within 2/10->2/10 of a mile and starts blowing, but it's far from very warm.

Am curious what people are experiencing here. Perhaps I have a feather foot?
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  #4  
Old 01-09-2014, 09:41 AM
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cwinter cwinter is offline
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Quote:
Originally Posted by MP3_E46 View Post
All seven of my BMWs and every larger engines car I've owned has been like this. I'd be interested to see data showing a large engine warmed up by the end of the street - it seems unlikely that I had seven bad BMWs in a row (six new from the factory).

The 'Auto' climate control mode turns the fan up within 2/10->2/10 of a mile and starts blowing, but it's far from very warm.

Am curious what people are experiencing here. Perhaps I have a feather foot?
I have no idea how warm the engine is, as the N52 E90 does not have a gauge. However, another piece of experience I have is from a 1.6L 4cyl E36 I used to drive in Germany. Even in cold winters, when I pulled out of the garage onto the road and slowly sped up to around 45 mph, the temp gauge in the car would make it to warmed up (sitting straight in the center of the dial) after about half a mile. Of course, this is water temp, not engine oil temp, which I think the E9X with the N54/55 shows on its dial.

My experience has always been that BMWs warmed up much faster than any other cars I had previously.
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Old 01-09-2014, 09:47 AM
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Quote:
Originally Posted by cwinter View Post
I have no idea how warm the engine is, as the N52 E90 does not have a gauge. However, another piece of experience I have is from a 1.6L 4cyl E36 I used to drive in Germany. Even in cold winters, when I pulled out of the garage onto the road and slowly sped up to around 45 mph, the temp gauge in the car would make it to warmed up (sitting straight in the center of the dial) after about half a mile. Of course, this is water temp, not engine oil temp, which I think the E9X with the N54/55 shows on its dial.

My experience has always been that BMWs warmed up much faster than any other cars I had previously.
Water temp drives the heater core (effectively a reverse radiator). My 328i has a temp gauge in the bottom right of the cluster but has serious lag compared to what the OBD says.

All my smaller engine cars in Europe used to blow hot generally by the 'end of the street' - doubt any of them had a temp gauge though. When driving my Parents cars over the years I noticed they always too a while to heat up in winter (generally 2.7 liter or higher).
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  #6  
Old 01-09-2014, 12:00 PM
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Thats a long time ..... my 328i is blowing hot air by the time I turn out of the neighborhood ...... 1/2 mile.

The heat seats are cooking by the time I leave my driveway.
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  #7  
Old 01-09-2014, 12:36 PM
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You all have me questioning my cars now..

Bah, it's spring soon and the top's virtually always down then.
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  #8  
Old 01-09-2014, 01:42 PM
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Does your engine ever really get up to temperature as indicated by a normal dash reading, since it seems the E92 328i has the gauge?
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  #9  
Old 01-09-2014, 01:56 PM
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Quote:
Originally Posted by cwinter View Post
Does your engine ever really get up to temperature as indicated by a normal dash reading, since it seems the E92 328i has the gauge?
Yup. In winter I am pretty sure it is a little lower. I have highway trip to the city tonight so will check the dash + OBD. Am, fairly sure the dash says ~220F in summer and ~210F in winter but that could be in my head (it makes no sense as the thermostat should regulate)

After 10->15 minutes it gets to over 200F and blows super hot air. Perhaps people's definition of hot is different, I really don't think anything is wrong with the car. Will hook up INPA soon and check for shadow codes but you see from the pics that codes have not been reset in ~7K miles (had lots of minor warranty work done - roof adjusted, IBS replaced, door mirror etc).
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Last edited by MP3_E46; 01-09-2014 at 02:07 PM.
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  #10  
Old 01-09-2014, 02:09 PM
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Quote:
Originally Posted by MP3_E46 View Post
Yup. In winter I am pretty sure it is a little lower. I have highway trip to the city tonight so will check the dash + OBD. Am, fairly sure the dash says ~220F in summer and ~210F in winter but that could be in my head (it makes no sense as the thermostat should regulate)

After 10->15 minutes it gets to over 200F and blows super hot air. Perhaps people's definition of hot is different, I really don't think anything is wrong with the car. Will hook up INPA soon and check for shadow codes but you see from the pics that codes have not been reset in ~7K miles (had lots of minor warranty work done - roof adjusted, IBS replaced, door mirror etc).
Since your car shows oil temperature rather than water temperature, it is entirely normal to show a lower temp in the winter than in the summer, I would think.

I would be concerned if under any driving conditions (be it slow, city, hwy) the car is incapable of producing hot air within a few minutes. I guess in the North if you get sub-zero temps that statement might chance, but for normal winter temps of 20-30 F, there should be no issue getting hot air relatively quickly.
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  #11  
Old 01-09-2014, 02:35 PM
Fastpaddler Fastpaddler is offline
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If I read your cool report correctly you are looking at your OIL temp guage as you probably dont have a water temp guage. I dont and my guage is always low down at the bottom for quite a while before it starts moving up to the normal range. Using Auto on aircon will slow up heat generation and transfer to interior. I turn up my temp control to 20(70 or so on yours) and heat comes out faster. Make sure the blue/red wheel in centre of dash is rolled to RED. Your manual might help further. I agree with you that your car is fine and BMWs are , in my experience, just as fast to warm up as other cars. Heh. With my heated steering wheel, heated buns and heat from every output orifice(on the dash) I am toasty warm. Enjoy!!!

Last edited by Fastpaddler; 01-09-2014 at 02:37 PM.
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  #12  
Old 01-09-2014, 06:00 PM
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1/2 - 3/4 mile max to get heat.
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  #13  
Old 01-09-2014, 06:08 PM
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Figure it out on the way there tonight.. and now I recall it from my other E9x cars.

With the climate control on full auto little warm air flows through the top vents. Press the vent to middle button and hey-presto heat! Next time I use that car I'll see how fast it feels from with that button lit up.

I'd wager this is the main problem others are having.
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Old 01-09-2014, 08:18 PM
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Quote:
Originally Posted by MP3_E46 View Post
Figure it out on the way there tonight.. and now I recall it from my other E9x cars.

With the climate control on full auto little warm air flows through the top vents. Press the vent to middle button and hey-presto heat! Next time I use that car I'll see how fast it feels from with that button lit up.

I'd wager this is the main problem others are having.
BTW with full auto you are running the AC compressor and sending chilled air over the heating fins ....... turn off the AC, red/blue scroll wheel to full red, and put the hot air on your feet or in your face ...... all good!
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  #15  
Old 01-09-2014, 11:32 PM
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BTW with full auto you are running the AC compressor and sending chilled air over the heating fins ....... turn off the AC, red/blue scroll wheel to full red, and put the hot air on your feet or in your face ...... all good!
Did all the steps apart from the final one

Within about a month of owning this E93 I coded it to not turn on the AC when Auto is pressed - boy was that irritating
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Old 01-10-2014, 08:18 AM
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You know, after observing mine last night I was about to tell you that on automatic, the system does not direct much air to the center vents, most goes to the footwell and window. Personally, I think that makes sense since heat rises and I personally don't like hot air just blowing straight at me.

In either case, glad you figured it out. I always use the auto function and both during summer or winter I like how the system directs to the various vents. I guess not everyone does though.

I use A/C most days even in the winter, unless it is very dry. This morning, we had a lot of humidity in the air and the A/C made sure the windows didn't stay fogged up for long.
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Old 01-10-2014, 08:46 AM
hondo402000 hondo402000 is offline
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I think if your thermostat is failed open, during the winter the car wont get hot, could this be the issue?
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Old 01-10-2014, 08:51 AM
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Thanks cwinter

In many ways I prefer a simple knob for fan speed, one for hot/cold and one for vent control. Only one of my cars is still like that as climate control is standard on virtually everything now

80%+ of the time their tops are down and the climate off. Other than peak of winter/summer even my Prius has the windows rolled down and heating/cooling off
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Old 01-10-2014, 09:16 AM
hondo402000 hondo402000 is offline
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Just went to the bank, my car has been sitting for 4 hours, and got to the stop light about 200 yards up the road and already was blowing Hot air
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