Idling the Cars

[umarkhan1]

the idea is to not let the engine work hard when its cold, so drive gently till the temperature is normalized, after that you can go full power on it.

The post of PDM requiring daily check up is funny - no cars require that now, it has been somehow a tradition in Pakistan to open the stupid effing radiator cap to check the "null ka paani" in it. There is a reason the expansion bottle is transparent,

correction=expansion bottles are not transparent
they are full of rust due to tap water or become yellow due to diesel spray

[Xulfiqar]

Many Folks when start car in the morning, and most of them either push the accelerator again & again to make it warm 'or' will start driving after just couple of seconds from start. Both of these them bring bad results for Engines, but later.

Ideology for increasing RPMs (pushing the accelerator) is, to let the engine oil quickly circulate and lubricate each & every part of the engine. But these folk don't know that if they will NOT Push the accelerator so hard or again & again, even then the oil will lubricate each & every part of the engine. But it depends which kind of oils is being used.

Ok one more time,
....these folk don't know that if they will NOT Push the accelerator so hard or again & again, even then the oil will lubricate each & every part of the engine. BUT IT DEPENDS WHICH KIND OF OILS IS BEING USED.

Because every engine oil has its specific time to reach every part of engine & lubricate it, since cold start.

(again expecting many -ve comments, as usual, but lets see.)

those same sheep think that the oil takes an hour to vaporise and travel upwards in the engine, they have no idea the engine oil system is run via a pump and has a relief valve too. These people are the best for car manufacturers - they buy a new car every 4 years because the "shiny box on wheels" doesnt work.

The oil gets to upper galleries within a few seconds of startup unless you are starting your car at the base of K2 and have "tees chaalis ka mobilhaail" in the sump. In that case the pump can litearlly break apart too.

[Xulfiqar]

correction=expansion bottles are not transparent
they are full of rust due to tap water or become yellow due to diesel spray

oh yes - I forgot, phosphoric acid to the rescue.

[zamza]

free tip

don't seat your children in front always keep them in backseat

[GoodMan7]

the idea is to not let the engine work hard when its cold, so drive gently till the temperature is normalized, after that you can go full power on it.

The post of PDM requiring daily check up is funny - no cars require that now, it has been somehow a tradition in Pakistan to open the stupid effing radiator cap to check the "null ka paani" in it. There is a reason the expansion bottle is transparent,

Once it happened with my previous car (PDM). Its heat needle start rising while driving. I pulled over, opened bonnet felt the quite much of heat from whole engine. After giving rest for few minutes, I drove again. But after couple of minutes again heat index start rising upto the red level.
I checked the transparent bottle of water linked with radiator and it was showing full level. But infact Raditor water was leaked (from water body) and it never suck the water from the bottle.
Why it didn't suck water from the bottle while radiator ran short of water?

That?s why opening Radiator cap and checking water level is important in Pee Dee Amms.

[omarabdullah022]

1.Check fluids(weekly)
2.Start car
3.Fold car cover neatly and put it in the trunk(for me at least)
4. Open gate
5. Wear seat belt and recite dua.
All this takes about five minutes.
6.Drive with a very light foot till the engine reaches optimum operating temperature.
7. Floor the gas pedal all you like:P

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[Xulfiqar]

Once it happened with my previous car (PDM). Its heat needle start rising while driving. I pulled over, opened bonnet felt the quite much of heat from whole engine. After giving rest for few minutes, I drove again. But after couple of minutes again heat index start rising upto the red level.
I checked the transparent bottle of water linked with radiator and it was showing full level. But infact Raditor water was leaked (from water body) and it never suck the water from the bottle.
Why it didn't suck water from the bottle while radiator ran short of water?

That?s why opening Radiator cap and checking water level is important in Pee Dee Amms.

Honestly that is the most daft and silly reason Ive seen to open the radiator cap.

the system cannot create a vacuum under the radiator cap if there is a leak (you mentioned water pump) and hence not suck the expanded coolant. its not only PEE DEE AMMS - its a universal thing - if you have a leak in a closed system that is supposed to create vacuum - vacuum wont be created - no vacuum or even a leak in the overflow pipe or a bad radiator cap seal will lead to "AIR" being sucked in instead of the expanded liquid. - hence when you open the cap you see low liquid level because human eyes cannot see air and it is deduced that the system is low.

btw - your car has a heat index? WOW

and you can actually humanly FEEL the extra heat? - dude you are superman. When I work on hot engines - no matter if its 75C or 90C its freaking blazing hot to touch.

After your above comment, I believe you dont know how the system works, if your water pump was leaking you are at fault to keep driving it - with a leak like that you have air which can cause boil over inside the system...

[GoodMan7]

the idea is to not let the engine work hard when its cold, so drive gently till the temperature is normalized, after that you can go full power on it.

After a cold start there is a particular amount of time that we should give to Engine so that oil can well circulate in each & every part of it that needs lubrication.

In a separate post a gentleman quoted that manual of Honda City says that its ok to drive right after cold start and no need to burn fuel on idling. Perhaps they should write to give it xyz amount of "seconds" after cold start before driving because oil takes bit of time to circulate properly within engine. And majorly it depends that which type of oil is feeded to engine.

I am searching for that post and will post some facts over there but perhaps you already known them very well.

[GoodMan7]

Honestly that is the most daft and silly reason Ive seen to open the radiator cap.

the system cannot create a vacuum under the radiator cap if there is a leak (you mentioned water pump) and hence not suck the expanded coolant. its not only PEE DEE AMMS - its a universal thing - if you have a leak in a closed system that is supposed to create vacuum - vacuum wont be created - no vacuum or even a leak in the overflow pipe or a bad radiator cap seal will lead to "AIR" being sucked in instead of the expanded liquid. - hence when you open the cap you see low liquid level because human eyes cannot see air and it is deduced that the system is low.

btw - your car has a heat index? WOW

and you can actually humanly FEEL the extra heat? - dude you are superman. When I work on hot engines - no matter if its 75C or 90C its freaking blazing hot to touch.

After your above comment, I believe you dont know how the system works, if your water pump was leaking you are at fault to keep driving it - with a leak like that you have air which can cause boil over inside the system...

The leak happened from the water body. And it was so minute whole to pass 1 drop per second. But as the engine's functioning temperature is above 100C, hence all the drops continuously coming out from it, were evaporating in the fraction of seconds and there was not a single drop on the floor underneath.

[Xulfiqar]

The leak happened from the water body. And it was so minute whole to pass 1 drop per second. But as the engine's functioning temperature is above 100C, hence all the drops continuously coming out from it, were evaporating in the fraction of seconds and there was not a single drop on the floor underneath.

what car do you own that operates its engine above 100C ?????

[Xulfiqar]

After a cold start there is a particular amount of time that we should give to Engine so that oil can well circulate in each & every part of it that needs lubrication.

In a separate post a gentleman quoted that manual of Honda City says that its ok to drive right after cold start and no need to burn fuel on idling. Perhaps they should write to give it xyz amount of "seconds" after cold start before driving because oil takes bit of time to circulate properly within engine. And majorly it depends that which type of oil is feeded to engine.

I am searching for that post and will post some facts over there but perhaps you already known them very well.

As soon as the engine fires (above 400 rpm) the oil pump starts to spin at crankshaft rpm and push oil to the crank immediately, the oil filter will also work in bypass mode as the pressure is too high on the thicker oil - this is done to prevent wear on the crankshaft - its not that all oil lives in the sump, some of it is trapped in the oil filter which acts a buffer to get pushed out immediately - engines with correctly placed filters have this advantage with full filter capacity. Upside down filter canisters need a very high quality anti drain back valve for this job. (leppon etc. dont have the correct coil spring loaded silicon material anti drain back valve like OE or higher brand filters do)

[GoodMan7]

what car do you own that operates its engine above 100C ?????

OMG.... It was Mehran. And it has its water body connected very closely to the engine & radiator. And it was confirmed that leak was from water body which I have it changed after that incident.

About temperature, I've read it somewhere on American website of oils that Gasoline engines working temperature is 150~250C
And Diesel engines working temperature is upto 350C.
Is it correct?

[awais.9]

i dont idle my cars,i just start em up n start driving at low rpm n very slow until it gets warmed up

[Xulfiqar]

OMG.... It was Mehran. And it has its water body connected very closely to the engine & radiator. And it was confirmed that leak was from water body which I have it changed after that incident.

About temperature, I've read it somewhere on American website of oils that Gasoline engines working temperature is 150~250C
And Diesel engines working temperature is upto 350C.
Is it correct?

your engine thermostat is of 82C - the cooling fan cuts in at 92C and cuts out at 87C - how did you get the silly 150C figure, you wont have a working engine with that temperature.

In american cars the temp is mentioned in Fahrenheit on the gauge. you may have seen that.

350*C - that would be murder for the engine - lock siezed and melted plastic parts around it. you sure what you read was not exhaust gas temperature.

even that is incorrect - EG temperature of a gasoline engine is higher than a diesel.

[GoodMan7]

your engine thermostat is of 82C - the cooling fan cuts in at 92C and cuts out at 87C - how did you get the silly 150C figure, you wont have a working engine with that temperature.

In american cars the temp is mentioned in Fahrenheit on the gauge. you may have seen that.

350*C - that would be murder for the engine - lock siezed and melted plastic parts around it. you sure what you read was not exhaust gas temperature.

even that is incorrect - EG temperature of a gasoline engine is higher than a diesel.

yes there was infact misunderstanding of C & F.
i got confirmed that given temperatures (from where i read) were in F.
thanks.

[huzaifa.haroon]

guess what, i already gone through the topics "idling" and "anti-idling" comprehensively on wiki.
lets forget what they have mentioned because in Pak. the air that we breath in is not so pure like those countries.
but lets see if this real practice (of idling couple of more min) brings good or no effect at all.

Yar who the hell are u ???
Pakistan is your own country ab petrol pure nahi tou kis ne kaha k hava bhi pure nahi ?
Bro plz support pakistan
And kaun sa aisa mulk hay jahan ki hava pure hay ? America ? Whan ki bhi pure nahi hay bro ..
Jahan par ye garian waghera hoen ge to wahan pe hava itni pure to nahi ho ge na lekin is se gari ko koi masla nahi hota (it v little unpure)

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[Xulfiqar]

Yar who the hell are u ???
Pakistan is your own country ab petrol pure nahi tou kis ne kaha k hava bhi pure nahi ?
Bro plz support pakistan
And kaun sa aisa mulk hay jahan ki hava pure hay ? America ? Whan ki bhi pure nahi hay bro ..
Jahan par ye garian waghera hoen ge to wahan pe hava itni pure to nahi ho ge na lekin is se gari ko koi masla nahi hota (it v little unpure)

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I once met a kid in a loud Honda which wont start after a "svap"

his reason - this engine is so awesome level JDM it only works on "japanese domestic air"

[faiz.aslam.121]

i dont idle my cars,i just start em up n start driving at low rpm n very slow until it gets warmed up

I usually start the car, open garage gate, check if main gate is open and by the time i come back it has been idle for 1 min. Multi-tasking

[GoodMan7]

I usually start the car, open garage gate, check if main gate is open and by the time i come back it has been idle for 1 min. Multi-tasking

its kinda good practice.
But if you use 20/50 engine oil, then perhaps it need a bit more time than a minute for a proper warm up.

[GoodMan7]

Yar who the hell are u ???
Pakistan is your own country ab petrol pure nahi tou kis ne kaha k hava bhi pure nahi ?
Bro plz support pakistan
And kaun sa aisa mulk hay jahan ki hava pure hay ? America ? Whan ki bhi pure nahi hay bro ..
Jahan par ye garian waghera hoen ge to wahan pe hava itni pure to nahi ho ge na lekin is se gari ko koi masla nahi hota (it v little unpure)

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as i have mentioned that i have gone through the idling & anti-idling topics on wiki. And they wrote alot about the idlings effect on atmosphere, health and other issues, etc. So before someone dragg the discussions to the enviornmental issues, i just wanted to stay focused on idling only.
Hope clear.