Engine Warm-up: Necessary or not?

[Scott Bernard]

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Common sense na ni ang e warm up.

[harphaul]

For car or any 4 wheeled vehicles:
I think I have a different approach with the others.
For me, idle warm up is not necessary, especially if the engine of your vehicle has a good response after starting up.
Around 5 seconds after starting the engine, turn on the radio, then the aircon, then ready your self by adjusting the seat if necessary and other accessories like the mirrors, and then you're ready to go. I think those are enough.
Or you may start the engine, and then run the vehicle.
Just run the vehicle nicely and slowly on the first kilometer.
And never, and I really mean never, rev the engine after starting the vehicle.

If the engine does not respond well after starting up, or it dies suddenly or if you won't rev, then there's something wrong with your vehicle, and it needs care.

[jayson921]

tan.aw pud nako necessary jud imbis 1 min or 45 secs. pero sa ako case, ako ipa.andar nya ipagawas ra sa garage nya sa gawas nako pa warm-up kay kung sa sud, baho man kaau ug aso. tan.aw ninyo ok ra na?

[kit_cebu]

...... use comon sense....warm up gyud specially on cold mornings......do we need to argue on this issue ? c'mon !

kung di i-warm up, di mo-circulate ang oil?
senxa sa bogits....pero can you provide a simple/common tao explanation?

this can be a subject for a debate....

[harphaul]

kung di i-warm up, di mo-circulate ang oil?
senxa sa bogits....pero can you provide a simple/common tao explanation?

this can be a subject for a debate....

For 4 wheeled vehicles:
After starting the engine, oils start to circulate (I think the transmission oil too).
And oil circulation does not crawl. Oils circulate fast.
The best way to really warm up the engine is to drive it.
The engine is not the only part of the vehicle that needs warm up.
Wheel bearings, steering, suspension, transmission and tires also need warm up, and they can be warmed up too through driving.
Drive slowly on first few kilometers (Max. rev = 2000rpm) until the engine reaches, or is near, its normal engine temp.

1. Start the engine
2. Lock the doors
3. Check, and if necessary, adjust the mirrors
4. Turn on the radio
5. Turn on the aircon
6. Wear seatbelt

I think that would be an enough idle warm up, and you're ready to go.

Some key points to remember (in my opinion)
Drive slowly and never rev < 2000rpm on first few kilometers until your engine reaches its normal temperature.
Sound engines, whether gasoline or diesel powered vehicles, will not weaken or die after a cold morning start up.

And besides, we're in a tropical country. Our coldest temperature here is a far-cry from freezing point.

But if you really want an idle warm up of your vehicle, 1 minute is more than enough.

[harphaul]

...... use comon sense....warm up gyud specially on cold mornings......do we need to argue on this issue ? c'mon !

Yeah, warming up is common sense indeed. But I think what TS wants to clarify is "idle warm up", meaning leaving the vehicle for quite a time before running it.

I just noticed on some motorcycles, like XRM, it suddenly dies after a cold start up. Is it natural? Even the brand new ones.
Sometimes, or most of the times, you need to start up more than once, and rev high...
I don't have any motorcycle, and much more any idea on their behaviour. I just noticed this one.

[binarypill]

kung hunahunaon jud, since metal parts mana ang engine, susceptible jud na siya sa compression/expansion due to temperature. this is why most engines have an optimal temperature range for best performance.

obviously, if cold starting ang engine, dili pa jud na siya naa sa iyang optimal temperature. kung inana, ang oil is sluggish pa unya di pa kaayo maayo ang iyang combustion. mao pud usahay mapalong kay posibleng dili kaapas ang compression/expansion cycle.

so, if inana ang situation, don't you think it's much better nga inanayon nato ang pag-init sa makina instead of dali-dalion?

if dalion nimo ang metal ug painit, as you know, mabuak or, ang iyang deformation due to expansion is irregular. so inig compression na pud sa metal due to cooling down, kuyaw na mo-crack.

[harphaul]

kung hunahunaon jud, since metal parts mana ang engine, susceptible jud na siya sa compression/expansion due to temperature. this is why most engines have an optimal temperature range for best performance.

obviously, if cold starting ang engine, dili pa jud na siya naa sa iyang optimal temperature. kung inana, ang oil is sluggish pa unya di pa kaayo maayo ang iyang combustion. mao pud usahay mapalong kay posibleng dili kaapas ang compression/expansion cycle.

so, if inana ang situation, don't you think it's much better nga inanayon nato ang pag-init sa makina instead of dali-dalion?

if dalion nimo ang metal ug painit, as you know, mabuak or, ang iyang deformation due to expansion is irregular. so inig compression na pud sa metal due to cooling down, kuyaw na mo-crack.

Sir, is this for motorcycle or 4 wheeled, or more, vehicle?
Because in cars or trucks, if you start the engine and it suddenly dies, there's something wrong with your vehicle.
Cars or trucks, no matter how old it is, when properly maintained, should not die, or should not be weak, after a start up.

Yes, you're right there that we have to slowly warm up the engine. And one way of warming it up is to run the vehicle slowly on its few kilometers, and never rev it up more than 2000rpm, until the right engine temp is reached.
And about the heat, if the metal can handle the heat. Engine parts are built to handle the engine heat, even at its peak, for as long as your cooling system is okay.
And I guess, metals surrounding the engine won't crack easily. There must be something wrong if the metal cracks (like too much bolt tightening, etc) hehehehe

And if you have a good quality of engine oil, no matter how cold it is in our place (Cebu), it won't matter during cold start up 'coz the required kind of engine oil for our country won't degrade just because its cold in the morning or in the evening.
Dba we have this 0W, 5W, etc. I think here in our country, the required engine oils are labelled 10W-40, 15W-40 (correct me if I'm wrong on this one).
Well, if your oil degrade over time, it's a different story.

In my opinion, if your vehicle's engine is weak after a cold start up, I think it needs a check by a mechanic.
Maybe it needs tune up, or top overhaul, or whatever it is needed.

And for motorcycle, no idea, really hehehe

[UrbaNo]

engine warm up? sa kinaunhan pag andar sa adlaw. yep recommended sa tanan its like a routine for the car and you. pero kng gikan na gani ang awto ug paandar, no need to idle for many sec.

[SuperStar]

warm up ko pero mga 30secs ra