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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Mechanical Maintenance and TSBs: Break-in / Oil & Fluids / Servicing / TSBs and Service Bulletin > How do you warm up your engine?
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      03-23-2017, 02:13 PM   #67
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Quote:
Originally Posted by Gamb1t View Post
Might want to invest in an engine block heater if the car sits outside under these conditions.
Idling when the car runs rich is terrible.
The car doesn't run rich though, it runs lean (normal) I believe it was 14.5 AFR.
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      03-23-2017, 07:05 PM   #68
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I don't warm it up any particular way. Only according to what conditions call for. Sometimes that's soccer dad style, taking the kiddos to school, in which case it gets started when the little ones are getting seated and before I get into it. Usually I hear the exhaust valve close on my way around the car.

Other times, it gets warmed up while I drive it like I'm trying to reverse time itself. Leaving late for a meeting? Ah, the Bimmer can fix that!

Overall, I'd say I drive it without much regard for the mechanicals. I've found most vehicles can't stand up very well to my (ab)use. But, if it breaks, I'll typically upgrade it. Even it that means engineering a new solution myself.

I'm hoping to progress to vehicles that take well to a good romping, as long as they're well cared for otherwise. We'll see how this X3 fares. I've laid Mazda, Subarus, Nissans and VWs to rest in the past. I'm hoping having moved up the scale a little bit buys some longevity. Although I hear that water pump is a time bomb.
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      03-24-2017, 05:24 PM   #69
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Quote:
Originally Posted by chaungo View Post
The car doesn't run rich though, it runs lean (normal) I believe it was 14.5 AFR.
That's stoichy reading probably read during idle after warming up.

Try reading AFR at initial startup after the car sits overnight. It's set for rich mixture until warmed up for combustion and forces the cat to work overtime to deal with emissions. Nothing like the gas aroma in the morning to wake up the gearhead.
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      03-24-2017, 07:12 PM   #70
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Quote:
Originally Posted by Gamb1t View Post
That's stoichy reading probably read during idle after warming up.

Try reading AFR at initial startup after the car sits overnight. It's set for rich mixture until warmed up for combustion and forces the cat to work overtime to deal with emissions. Nothing like the gas aroma in the morning to wake up the gearhead.
I don't have a catted DP so....

I believe it sits at 14.0 AFR.
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      03-27-2019, 11:29 AM   #71
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We so rarely have anything resembling "cold" weather that I'm out of practice. Like most of you, I start, let the car's idle speed fall while I buckle up, take the parking brake off if need be, and get the radio onto my preferred station. I might also change the display on the iDrive. Then I drive "sanely," as someone above said, through the bad surfaces of my apartment complex parking lot until I reach the main 6-lane street.

After that I go: two miles at 45 mph or a bit more to the bridge, and everybody up there behaves as if they're in Grand Theft Auto, so I have to be ready to hustle.

If the weather is really cold, below freezing, I'll give the car an extra 30 seconds or so.
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      03-27-2019, 01:06 PM   #72
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About as long as it takes to roll one of those funny cigarettes....

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      03-28-2019, 09:23 AM   #73
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I enjoy the cold start for 30 seconds then limit to 3k RPM for the first few minutes of driving. Then I'll more or less simulate the old school M guages that gradually raise the RPM as the oil heats.
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      03-28-2019, 11:03 AM   #74
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Get in and floor it to redline for 3 minutes, gets the heater hot a lot quicker...
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      04-12-2019, 07:26 PM   #75
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Quote:
Originally Posted by KGB_123_99 View Post
I like to use Eco Pro when the engine is really cold. Keeps the RPMs from going high and turbo boost to a minimum.
Quote:
Originally Posted by smithf80 View Post
Eco Pro, then I pull away after however long it takes for me to pick a radio station and look at traffic info to see which highway I should take. Unfortunately my car doesn't have much time to warm up before having to enter the highway as I live right by the entrance.
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Originally Posted by wolves View Post
Eco Pro start, no idle, about a mile or two keeping the revs low.
^^^ and I wait for about 30 sec. or just when the RPM starts to drop from its peak (~1500) at start-up. Cold engine will result in more unburned fuel and more carbon deposit in the chamber; so avoid hard acceleration sounds logical. But then again, this will take years to be significant enough and cause problems, shouldn't matter if you're not keeping your car past 100K miles.

Last edited by anh3; 04-12-2019 at 07:32 PM..
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      04-12-2019, 10:30 PM   #76
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Those who think warming the engine before driving it have a valid point, because while the oil is still cold it doesn't flow as well as it does after it warms, which results in increased wear. But the engine and oil warm faster when it's being driven than when it sits at an idle, so it's best not to let the engine warm before driving it. That's why BMW says don't let it idle to warm up. It's also why BMW says not to wind the engine up until the engine does warm to the point that the oil is flowing well enough to do its job.
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