BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

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      08-08-2009, 06:25 AM   #1
Jimmydean
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How long until engine is at proper operating temperature?

Guys, how long does it usually take to get your cars engine up to normal temperature? So you can unleash the beast?

I have a 128i and no temp gauge, so it sucks. All I do is a little suburban/highway driving to/from work, usually 20 minutes each way.
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      08-08-2009, 06:26 AM   #2
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2 - 3 minutes.
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      08-08-2009, 06:32 AM   #3
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^ Yep!

Not long at all.
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      08-08-2009, 06:45 AM   #4
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Is that just for the 128? The 135 takes ages to heat up - like 15mins.
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      08-08-2009, 07:04 AM   #5
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Agreed.... it takes me about 15mins to warm up...
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      08-08-2009, 08:15 AM   #6
Jimmydean
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I see there is no consensus on this one. Either 2-3 minutes or 15. Any others?
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      08-08-2009, 09:39 AM   #7
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Lester, how do you know the 128i is up to temp in 2~3 minutes?

Not liking the absence of a temp gauge on my 128i, I asked my dealer's service manager. He said that BMW's official word to them was that the 128i motor warmed up very quickly and could be revved without concern after 45 seconds to 1 minute.
Personally, I give mine at least 3~4 minutes before exceeding 3,000 rpm - more in very cold ambient temps.

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      08-08-2009, 10:24 AM   #8
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There are many variable of course - such as ambient outside temperature etc. But most normal modern engines are required to warm up quicky to meet emission standards. It does not take long, expecially if you are driving even under moderate load for the engine to reach an efficient operating temp. Two to three minutes is all it should take.
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      08-08-2009, 10:33 AM   #9
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Quote:
Originally Posted by sparoz View Post
Is that just for the 128? The 135 takes ages to heat up - like 15mins.
Keep in mind that the temperature reading on the 135i is taken from the oil level sensor in the bottom of the oil sump, which slows it down some, and I'm of the opinion that it's dumbed down electronically.

The water is up to temp after a few minutes in the summer time.
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      08-08-2009, 10:50 AM   #10
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Quote:
Originally Posted by jeremyc74 View Post
Keep in mind that the temperature reading on the 135i is taken from the oil level sensor in the bottom of the oil sump, which slows it down some, and I'm of the opinion that it's dumbed down electronically.
If it's similar to BMW's water temp gauges over the past decade or so, you're probably right. Unfortunately, they were so heavily buffered, they served as little more than idiot lights. But they did indicate if the motor wasn't warming up properly - a necessary function given the life expectancy of some BMW thermostats.
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      08-08-2009, 11:10 AM   #11
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my engine takes 10 min and it pisses me off sometimes
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      08-08-2009, 01:56 PM   #12
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I don't think the oil gauge on the 135i is buffered as it moves around a lot depending on how you drive . But it does it take a while for the oil temp to reach the normal operating temps, so I shouldn't take that and I can drive normally after 3-4 minutes?
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      08-08-2009, 03:11 PM   #13
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I don't think the oil gauge on the 135i is buffered as it moves around a lot depending on how you drive . But it does it take a while for the oil temp to reach the normal operating temps, so I shouldn't take that and I can drive normally after 3-4 minutes?

I don't think it's overly buffered, just delayed on cold starts.
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      08-08-2009, 06:55 PM   #14
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Quote:
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I don't think it's overly buffered, just delayed on cold starts.
So BMW doesn't want 135i drivers to push the motor until warmed for 10~15 minutes; but it's OK after 45 seconds for the non-turbo? Sounds like HP fuel pumps are the least of their worries!
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      08-08-2009, 07:16 PM   #15
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So what is "operating temperature" considered for the 128i and 135i anyway?
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      08-08-2009, 07:16 PM   #16
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Quote:
Originally Posted by Tom K. View Post
So BMW doesn't want 135i drivers to push the motor until warmed for 10~15 minutes; but it's OK after 45 seconds for the non-turbo? Sounds like HP fuel pumps are the least of their worries!
Tom

I'm not really sure if it's about the engine needing to be warmed up that long, or just a function of the sensor they're getting the reading from.

I've read that the oil level sensor determines the level based on how quickly the oil changes temperature. Checking it takes several minutes sometimes. I'm thinking the car does an oil level check on every cold start, and maybe the sensor doesn't start outputting temperature readings until it's finished the process. That's just a theory though.

What I do know is that I've had a lot of cars over the years, and I've NEVER seen one that takes even close to this long for the oil to actually come up to temp, so I have to believe we're not getting a real reading for the first several minutes of operation, for whatever reason.
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      08-08-2009, 08:05 PM   #17
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Personally, if you're only waiting a few minutes, especially just for the coolant to warm, you're doing it wrong. My M Coupe takes longer than the 135i to warm, and it makes sense that the 128i, without turbos, would also take longer than a 135i to warm. Waiting for the engine oil, and transmission oil to get to operating temperature will ensure the longevity of your engine, hammering it before this occurs certainly increases the odds of early problems. If it's a lease, carry on...
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      08-09-2009, 12:59 AM   #18
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Agree, 2-3 minutes.
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      08-09-2009, 02:01 AM   #19
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So on the 135i, is there any official information on how exactly should you drive before the engine is warm? An amount of RPM you should stay under?
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      08-09-2009, 10:13 AM   #20
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Quote:
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So on the 135i, is there any official information on how exactly should you drive before the engine is warm? An amount of RPM you should stay under?
To be safe, I keep it under 3000 rpms and no more then half throttle till its warm(around 200F)
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      08-09-2009, 11:07 AM   #21
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Quote:
Originally Posted by Eazy-e View Post
To be safe, I keep it under 3000 rpms and no more then half throttle till its warm(around 200F)
So oil temp at 200*F is officially considered "operating temperature"?
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      08-09-2009, 11:13 AM   #22
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Took mine out for a good run today, and it took just over 15 mins to get to 120 celcius. I dont go over 3000 rpm until the temp gauge is in the middle, then its fun time!
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