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Fact: Idling doesn't warm up the trany, tires or brakes. Watch F-1 race to see how they warm up the entire car.
Fact: Idling does more harm to the catalytic converters.
Common sense: ease up on the gas pedal after cold start. Slowly accelerate until optimal condition, Oil Temp at 3 bars.
Idling still gets the fluids moving in the transmission. I don't see how it can harm the catalytic converters. If anything at all you're just polluting more, and harming the environment.
I live in southwestern Ontario and the temps drop pretty low here during the winter. One thing I have noticed is that mine sounds like a damn diesel for a while until warmed up - I'd say about until I get close to the middle on the temp gauge. This only happens while accelerating though, my dad's old f150 was similar. The engine sounded really rough when accelerating while cold.
Hopefully this is normal, maybe i should be warming it up longer.....
I let car idle for about 4-10 minutes before I leave for work and drive exponentially harder as the car warms up and has served me right for years on many of my vehicles. If a car is not warmed up properly cars shift very harsh, clearances are to tight etc. Ofcoarse dependant of situation to low of climate weather etc, there is a point to where you will need to drive the vehicle to not cause excessive wear in warm up.
in my factory bmw M handbook, it says to never start and idle the car. its says to start car and drive immediately so the whole car can warm up the same (diff fluid etc).
so usually when the high idle drops, im gone. I know people who rev their car to warm up their car then drive off. Good luck to your valves.
Valves don't care about cold oil temperature. They hardly get any oil at all, and they're sliding friction anyway. Rod bearings do care about cold oil temps and they will be very unhappy if you starve your oil supply because they depend on continuous oil flow to prevent metal on metal contact.
BMW is right. As soon as your oil pressure light goes out, drive the car and put a light load on the engine to warm things up quickly without damaging anything. Idling is horrible for service life.
oh yeah i remember this thread
The conclusion i came to was to start driving after a few seconds
10-15 then just not rev to high or push the care to hard until the temp builds up
I believe this is the best method
I will typically allow the car to warm up for a minute or two before taking off. This is typically the amount of time it takes for me to plug in my cellphone, setup my iPod, or plan my route in the nav. It takes about 5 minutes for the car to reach operating temperatures here in the summer, which is roughly the amount of time it takes me to get to the highway's on ramp. I take it easy until I hit the on-ramp and by then the car is at operating temp, so I can start playing around a bit.
I basically do the same thing, but I do not take it over 3,500 rpm until I have two bars on the oil.
I warm up my F in the morning for about 3-5 min depending how late i am to work. No less the 3 min tho. When starting to dive, I usually dont drive more than 2k rpm for about a min for the tranny to really warm up. I drive the norm after it throughout the day. It gives me a peace of mind.
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