[c416]

Hello,

I have a question about turning off the car before the car reaches proper temperature. As I live about 1km from the gotrain and walking is not an option (don't ask ). Sometimes I have time to circle the area and run laps before I turn off the car, but not often.

I heard this is one of the worst things we can do to engines as the moisture (or carbon build up?) within the engine created don't have a chance to burn off and thus creates rust or issues within the engine.

Is this a legitiment concern with new engines, this being a thing of the past?

[vtec96]

I am on the same boat.....

[shaginwagon13]

I'm going to tag along as well to this question.

I know that if your ripping it and you turn your car off right away you destroy your turbos because they don't have a chance to cool down they basically stop and fry themself.

[Modded328FTW]

Not a bad idea to do a long drive about once a week to burn off excess moisture in the engine.

I used to commute 5 mins to a go train everyday, but I would do a nice drive 1 a week to stretch the cars legs and burn off any moisture.

[335BBS]

Originally Posted by jacewong

Hello,

I have a question about turning off the car before the car reaches proper temperature. As I live about 1km from the gotrain and walking is not an option (don't ask ). Sometimes I have time to circle the area and run laps before I turn off the car, but not often.

I heard this is one of the worst things we can do to engines as the moisture (or carbon build up?) within the engine created don't have a chance to burn off and thus creates rust or issues within the engine.

Is this a legitiment concern with new engines, this being a thing of the past?

If this is all the car ever does you may have a problem with exhaust (moisture build up) but Nothing serious in engine. You need to get it up to temp to dry it out every now and then.

Originally Posted by shaginwagon13

I'm going to tag along as well to this question.

I know that if your ripping it and you turn your car off right away you destroy your turbos because they don't have a chance to cool down they basically stop and fry themself.

In theory thats a slight possibility butt you cant take everything you read literally. If that was the case there would be fried turbos everywhere. They get cooled...I've never heard of this happening to anyone.

[QBall28]

I had a 2002 BMW 325i that i drove for a very short commute time in -20c to 0c. That resulted in a $2000 repair bill for a $70 dollar part.

To keep it short, as your engine warms it creates condensation = (cold block + combustion heat). When you reach optimal operating temperature, a valve opens PCV or CCV in a BMW and allows this moisture to be circulated into the combustion chamber, Viola no moisture in your oil.

But when you don't reach optimal temperature each time your creating moisture in the motor and engine oil. Since oil change intervals are so long you get a high moisture content. When that moisture surrounds a rubber membrane = CCV valve and freezes it tears and clogs that valve.

Go to e46 look up CCV valve, so look under your engine oil cap white film = moisture!

[BMWWW]

Originally Posted by 335BBS

If this is all the car ever does you may have a problem with exhaust (moisture build up) but Nothing serious in engine. You need to get it up to temp to dry it out every now and then.


In theory thats a slight possibility butt you cant take everything you read literally. If that was the case there would be fried turbos everywhere. They get cooled...I've never heard of this happening to anyone.

The reason why there are turbo timers are because if you drive spirited, and then shut off the car right away, the oil in oil-cooled turbos will just boil and cook. Turbo timers keep the engine running, and keep the oil circulating to get a chance to cool down sufficiently. I'm not scientist, I don't have a thermostat hooked up to the oil temps, but it's always good practice (certainly with older turbo'ed cars), to lay off the go pedal a few minutes before reaching your destination/sit in your car while checking your phone.

[c416]

shieetttt.. thanks for the info!
what is proper opt tempt? 110 degrees? takes me like 20mins to hit that.

Originally Posted by QBall28

I had a 2002 BMW 325i that i drove for a very short commute time in -20c to 0c. That resulted in a $2000 repair bill for a $70 dollar part.

To keep it short, as your engine warms it creates condensation = (cold block + combustion heat). When you reach optimal operating temperature, a valve opens PCV or CCV in a BMW and allows this moisture to be circulated into the combustion chamber, Viola no moisture in your oil.

But when you don't reach optimal temperature each time your creating moisture in the motor and engine oil. Since oil change intervals are so long you get a high moisture content. When that moisture surrounds a rubber membrane = CCV valve and freezes it tears and clogs that valve.

Go to e46 look up CCV valve, so look under your engine oil cap white film = moisture!

[Pierce330]

I think that this question came up somewhere else on this forum as well. I am in the same boat, I drive 2.2 km to get to work. However, I take a longer 15-20 km drive on the way home everyday. But, I do idle in the Tim Horton's drive through line in the morning, so my 325 does reach normal operating temperature. Regardless, short, cold trips are not well received from our cars

[Devas]

I reach 50 degrees oil temp after 20 mins of driving conservatively, especially in this recent weather

[335BBS]

Originally Posted by BMWWW

The reason why there are turbo timers are because if you drive spirited, and then shut off the car right away, the oil in oil-cooled turbos will just boil and cook. Turbo timers keep the engine running, and keep the oil circulating to get a chance to cool down sufficiently. I'm not scientist, I don't have a thermostat hooked up to the oil temps, but it's always good practice (certainly with older turbo'ed cars), to lay off the go pedal a few minutes before reaching your destination/sit in your car while checking your phone.

I know how they work. Have you ever heard of one seizing from overheating?