akiratdk

Hey guys~~~
I was just reading my BMW manual right now and I found this....
and I was wondering is this true to our cars as well??? and why???

"Do not allow the engine to warm up by leaving it runnin while the vehicle remains stationary. Instead, drive off immediately at a moderate engine speed."

For me I always thought we should warm up the car when cold... and let it sit untill its warmed up.... but I'm I wrong???
any advice is appreciated.
Thanks

SRA-FD3S

wtf!!!!.....damn You Got Me Thinking!

twisted7

iTrader: (3)

the car will def warm up faster if u drive it around...u will want to let it sit for a few minutes before doing so and not boosting ur car if u do...i always let my sit and warm up and wait for the idle to drop to where it is supposed to be...i could be wrong but maybe bmw says this because correct me if im wrong it leads to carbon buildup...but thats my 2 cents hope it helps..

cblake3

iTrader: (2)

I have read posts on this topic in the past that have said NOT to let your Rex sit in the driveway and warm up on it's own. The reason that was noted was that it idle the oil injectors are not functioning or functioning only slightly. Not sure of the validity of this, but it makes sense. The oil pump on my FC was operated in conjunction with the throttle by use of a rod connected to the throttle via linkages.
I believe the oil pump on the FD is electronic, but I am sure that they opperate similarly.
Given this info, I tend to let my car warm up for a couple of minutes in the driveway and then I cruise around the neighborhood at very low speeds (10-15mph) until it is proper operating temperature. Thank goodness it is not a daily driver or it would take me forever to get to work in the morning.
Can anyone verify the function of the oil injectors at idle.

rynberg

You people are being silly.

YES, it's better to warm-up the car while driving. Just let it idle for 0.5-1 min before driving (cold start).

YES, the oil injectors function during idle.

NO, you don't have to drive around at 10-15 mph just to safely warm the car up.


Geez guys, it's a CAR. Start it up, let the fluids circulate for 30sec to 1min and drive. Just don't go crazy on the throttle or revs until the car is warmed up.

SayNoToPistons

i agree with rynberg haha. even for our infiniti and 93 mpv. i let it drop done to 1k rpm and then slowly drive off.

David Beale

One reason the manufacturers want you to drive it away is the cat. converter works extra hard at idle. It will overheat (read the RX manual - it warns of this at idle).

It's a good idea to try to stay out of boost as when cold the oil flow to the turbos isn't very good, but these are really the only things to consider.

I start mine up, back out of the garage, close the doors and drive away, keeping it out of boost until the coolant temp. is close to normal.

HAI-TEK7

iTrader: (31)

Cant get better than that^^

adam c

iTrader: (2)

Letting your car sit and warm up is a waste of time, gas, and money. In addition, you are putting additional wear on the engine while you are not even driving it

akiratdk

Cool~~~ yea I was just wondering why its not good to do that because I mean... if a factory manual says that then there has got to be a reason.... hehehe. But yes... this is just a CAR.....
For me I am stereotypically convinced that you should let the car stay idle and not move till normal opperating tempuratures. Anyways..... its a good subject to talk about~~

Shinobi-X

What would be the difference in moving if your engine rpm and load are still minimal? Other parts of the car get to warm up too, so long as you're taking it easy. With the recent cold weather, most mornings my car has been seeing stating temps of 7c and lower. I let it warm while I get my things together (usually to about 20c by the time I'm done) and keep it out of boost and under 2.5k-3k rpm until fully warm. No problems.

RX 4 Speed

I do this too... ^^ Are you guys proposing that I stop doing this for fearing of damaging my engine and other components? Main reason why I let it idle in my garage before heading out, is so that when I DO go out, I can at least drive it normally (still not into boost that much until normal op temps). I guess I've been wasting all that time before letting it warm up AND hurting my car?

Shinobi-X

I doubt anything will be damaged by just driving it and keeping things easy. Keep in mind, that I don't let my car FULLY warm while idling. Its just when I go to finally driving after gathering my stuff, its up to 20c (anything less, and its actually more difficult to shift than anything). I keep it easy until 82c- I have the thermal pellet mod and I premix.

Retserof

iTrader: (1)

The coolant heats up quickly and the gauge needle reaches "normal: before the engine is fully warmed up, so you might want to wait a while after that before any hard acceleration. My FD doesn't have an oil temp gauge, but conventional wisdom for piston engines is to take it easy until the oil temp is at least 150 F.

DamonB

I start the car and immediately drive it. I never run it hard until I see at least 170F though.

Letting a car idle in the driveway to warm the motor is pointless and it takes longer to warm the motor that way than if you just drive the car!

akiratdk

Agreed!!~~~~ with DamonB!!~~~~

1QWIK7

iTrader: (33)

i agree with rynberg however according to time, mood and temp, i maybe let the car idle more or less..

my friends used to always let their car idle for like 20 minutes in the winter time and i would laugh at them. then they would curse at me saying i dont know how to take care of a car..well i got more mpg than all of them lol..

in the summertime, both the fd and dd, i let it idle literally for 20 seconds and im off, low revs for about 5 minutes and the temps are already at operating mode..in the wintertime, idle for about 1 to minute and a half and im off with low revs for about 10 minutes..

t-von

iTrader: (8)

Exactly. You also build up more carbon build-up while idling (especially when the engine is cold). I don't even blip the throttle to drop the idle when I start it. Once the idle settles down then I drive off and keep the revs low until it's fully warm.

rynberg

To be fair, I tend to let my car idle for a few minutes before driving it anyway... The car just doesn't drive that well when it's really cold (could be PFC tuning issue). I don't use idling as a substitute for properly warming up the car though.

1QWIK7

iTrader: (33)

you're right..the car doesnt seem to rev when its still cold (even though you let it idle for about 3-5 minutes). like today, i havent drove the car since sunday when i went to the track. i let it run for about 5-6 minutes til the stock temp gauge was at normal yet my real water temp gauge was still showing at min (its about 38 degrees btw). and i go drive up my block and the car doesnt want to seem to rev past 3k..so i have to shift mega early in each gear with people riding my *** on every block (sucks when you're non seq)..

about 10 minutes later, temp gauge is reading 155=160f, i step on it a bit and its awake lol