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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Cool down time and warm up time



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      02-21-2017, 10:00 AM   #1
LamboCalrissian
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Cool down time and warm up time

Hello everyone,

I am a new(er) 335i owner. I know, in general, with turbocharged cars you normally want to give them time to warm up when they are cold, and cool down for a bit once you have stopped. How long do you guys let your cars warm up and cool down? Any opinions are appreciated!

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      02-21-2017, 10:05 AM   #2
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Have you read the owners manual?

Generally, you don't let the engine sit and idle to warm up. It's designed to be driven right away. Naturally, you don't want to beat on it when it's cold. I'm under the impression that 335i's have oil temp gauges, so that would be a good thing to pay attention to.

As for cool down - maybe if you're doing a track day in the summer, but if you're just driving to work or something I don't think it's neccesary. That idea had a lot to do with the turbo & bearing construction of the '80s and '90s, and also the lack of using synthetic oil.
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      02-21-2017, 10:12 AM   #3
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Warm up time, just wait until the oil temperature gauge on the dash reaches normal operating temperature before getting on it. Yes the gauge on the dash shows the oil temperature, and not the coolant temperature like most cars.

The turbos on the n54 are water cooled, and the n54 has an electric water pump which will keep running for a few minutes after the car has been shut down if the coolant/oil temperature is too high. With that said, if i'm hard on my car, and the oil temperature goes up because i'm pushing it, i'll drive around easy until the oil temp goes back to normal before shutting the car off.
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      02-21-2017, 10:41 AM   #4
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I let it warm up 10min regardless of weather outside, and when I'm close to my destination I take it easy and when I park I sit another 5min or so for oil pressure to drop.. Idc what manuals or anything say, for me this has always been the right way in maintaining turbos.
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      02-21-2017, 11:07 AM   #5
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The manual says start it up and drive away. It specifically says NOT to let the car sit to warm up - it's a waste of gas and is actually worse for the engine. I'm pretty sure it also says it's unnecessary to let the car cool down, but that probably doesn't do any harm.
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      02-21-2017, 11:15 AM   #6
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I remember reading somewhere, that since all of our parts are mechanical and what not, cool down time is not required because after you shut your car off it keeps pumping fluids and what not..
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      02-21-2017, 11:18 AM   #7
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Quote:
Originally Posted by mojobmw_e90 View Post
I let it warm up 10min regardless of weather outside, and when I'm close to my destination I take it easy and when I park I sit another 5min or so for oil pressure to drop.. Idc what manuals or anything say, for me this has always been the right way in maintaining turbos.
Yeah, technology, who needs it?
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      02-21-2017, 11:23 AM   #8
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I think you mean, owners manuals, who needs them?
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      02-21-2017, 11:23 AM   #9
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Quote:
Originally Posted by hassmaschine View Post
Have you read the owners manual?

Generally, you don't let the engine sit and idle to warm up. It's designed to be driven right away. Naturally, you don't want to beat on it when it's cold. I'm under the impression that 335i's have oil temp gauges, so that would be a good thing to pay attention to.

As for cool down - maybe if you're doing a track day in the summer, but if you're just driving to work or something I don't think it's neccesary. That idea had a lot to do with the turbo & bearing construction of the '80s and '90s, and also the lack of using synthetic oil.
This. Read the manual. Warm up time is when you're driving and oil temps go up to operatic temp. Period. Cool down time is when you shut it off and walk away. These cars have electric water pumps. They circulate coolant for a short time after you shut it off based on how hot the oil temps were.

If you're at the track I'd let it cool down a bit more but for daily use this is absolutely unnecessary.
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      02-21-2017, 11:39 AM   #10
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Quote:
Originally Posted by mojobmw_e90 View Post
I let it warm up 10min regardless of weather outside, and when I'm close to my destination I take it easy and when I park I sit another 5min or so for oil pressure to drop.. Idc what manuals or anything say, for me this has always been the right way in maintaining turbos.
Wow, Really? For some reason 15 minutes each trip sounds egregious.

I let it warm up for a minute or two MAX, then drive.

Back in the days of turbo timers and such yeah I could see the need to warm up and cool down. But that's old school, like changing your oil every 3k.

The cars are designed to be driven almost immediately and don't really need to be cooled down.
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      02-21-2017, 11:44 AM   #11
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Nope, start and drive - stop and leave.

I don't drive very aggressively unless the oil temp needle is moving. But I don't drive like a little old lady before it does either.

No need to do anything after you pull up, as others have said the cooling pump keeps running for a while if needed.

This isn't the 80's and 90's anymore - no need for turbo timers lol.
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      02-21-2017, 12:27 PM   #12
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Quote:
Originally Posted by hassmaschine View Post
I think you mean, owners manuals, who needs them?
Indeed. Now, where did I leave that paperweight? Ha.
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      02-21-2017, 12:38 PM   #13
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Quote:
Originally Posted by mojobmw_e90 View Post
I let it warm up 10min regardless of weather outside, and when I'm close to my destination I take it easy and when I park I sit another 5min or so for oil pressure to drop.. Idc what manuals or anything say, for me this has always been the right way in maintaining turbos.
It takes 5 min for the oil pressure to drop?
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      02-21-2017, 12:47 PM   #14
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Quote:
Originally Posted by tlow98 View Post
Yeah, technology, who needs it?
Yea liquids and turbines must be electrical
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      02-21-2017, 12:49 PM   #15
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Quote:
Originally Posted by Gizm0 View Post
It takes 5 min for the oil pressure to drop?
Again you guys can do what you want. I do it my way. It's been working for me for 3yrs now, never had any complaints, but also gotta realize all the other fluids in the car get to slow down there work prior to shutting it off
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      02-21-2017, 02:27 PM   #16
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Quote:
Originally Posted by mojobmw_e90 View Post
Again you guys can do what you want. I do it my way. It's been working for me for 3yrs now, never had any complaints, but also gotta realize all the other fluids in the car get to slow down there work prior to shutting it off
I put a sign in my front yard saying "giraffes not allowed on my lawn" and it's working too! I've had it for 5 years now and still haven't seen a single giraffe on my lawn
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      02-21-2017, 02:40 PM   #17
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Do not wait for the engine to warm up while the
vehicle remains stationary. Start driving right
away, but at moderate engine speeds.

Source: 2011_3seriescoupeandconvertible_ownersmanual_withi drive.pdf (p.58)
located: http://www.bmwusa.com/standard/content/owner/dgh.aspx
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      02-21-2017, 03:07 PM   #18
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Originally Posted by Gizm0 View Post
I put a sign in my front yard saying "giraffes not allowed on my lawn" and it's working too! I've had it for 5 years now and still haven't seen a single giraffe on my lawn
U must live in Africa to have giraffes on your front yard. Better yet they must be super smart to even be able to read the sign 😆
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      02-21-2017, 03:21 PM   #19
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Quote:
Originally Posted by mojobmw_e90 View Post
Quote:
Originally Posted by Gizm0 View Post
I put a sign in my front yard saying "giraffes not allowed on my lawn" and it's working too! I've had it for 5 years now and still haven't seen a single giraffe on my lawn
U must live in Africa to have giraffes on your front yard. Better yet they must be super smart to even be able to read the sign 😆
Lol.

I think his point is, just because he put the sign out there, doesn't mean the sign is the reason Giraffes aren't showing up

Just because you're warming up and cooling down your car, isn't a reason to think that is "maintaining" your vehicle. Especially when the owners manual says otherwise lol

I can't believe I just had to explain that
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      02-21-2017, 03:35 PM   #20
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Quote:
Originally Posted by hassmaschine View Post
Have you read the owners manual?

Generally, you don't let the engine sit and idle to warm up. It's designed to be driven right away. Naturally, you don't want to beat on it when it's cold. I'm under the impression that 335i's have oil temp gauges, so that would be a good thing to pay attention to.

As for cool down - maybe if you're doing a track day in the summer, but if you're just driving to work or something I don't think it's neccesary. That idea had a lot to do with the turbo & bearing construction of the '80s and '90s, and also the lack of using synthetic oil.
Quote:
Originally Posted by Krynos View Post
Nope, start and drive - stop and leave.

I don't drive very aggressively unless the oil temp needle is moving. But I don't drive like a little old lady before it does either.

No need to do anything after you pull up, as others have said the cooling pump keeps running for a while if needed.

This isn't the 80's and 90's anymore - no need for turbo timers lol.
I know right... so much ignorance on this thread. what is this, the 1980's? carburetors that need 10 minutes of useless idling to warm up? and turbos which need to be cooled down before you shut it off... no.

to whoever is blatantly disregarding manufacturer recommendations, stupid and ignorant. Idling would take at least half an hour to bring oil temperatures up. start it up and drive off right away. as soon as the oil temp gauges comes above the very first tick, you're good to start hammering it. drive softly until then.

and again... this isnt 1990. like someone said, if the oil or coolant temps are high, the pumps will keep running for a couple minutes to cool things down after you shut the engine off. you dont need to sit around idling once you reach your destination..

Last edited by STR8-6IX; 02-21-2017 at 07:45 PM.
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      02-21-2017, 03:36 PM   #21
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Quote:
Originally Posted by catcher22 View Post
Lol.

I think his point is, just because he put the sign out there, doesn't mean the sign is the reason Giraffes aren't showing up

Just because you're warming up and cooling down your car, isn't a reason to think that is "maintaining" your vehicle. Especially when the owners manual says otherwise lol

I can't believe I just had to explain that
Thank you!
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      02-21-2017, 07:00 PM   #22
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Quote:
Originally Posted by catcher22 View Post
Lol.

I think his point is, just because he put the sign out there, doesn't mean the sign is the reason Giraffes aren't showing up

Just because you're warming up and cooling down your car, isn't a reason to think that is "maintaining" your vehicle. Especially when the owners manual says otherwise lol

I can't believe I just had to explain that
Manual says don't change your transmission fluid ever, it's lifetime.. Make sure you follow that manual as well

Manual also says to change plugs every 40k or so,when u get a misfire hold off replacing them till you reach the 40k mark

Just because it's written in the manual doesn't mean you have to follow it. Same exact reason on what the other guy said. I'm done

Last edited by mojobmw_e90; 02-21-2017 at 07:06 PM.
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