Outer Limits 4x4 Board

I wondering how do you guys let the engin warm up Iam giving it 1minute at the moment but when it get colder i'll give it bit more.

I just don't rev it hard until the temp gauge is at the normal position. I start driving right away after starting.

HotFourOk wrote:I just don't rev it hard until the temp gauge is at the normal position. I start driving right away after starting.

I wait until I have oil pressure and/or the engine check light is gone - then I move off gently.

If the engine is cold I usualy start the engine with my foot all the way to the floor and when it fires I hold my foot down till the valves start to bounce then hold it there for about 5 minutes more (sometimes I use a brick on the throttle) if the engine is already warm I do exactly the same thing.

And when I am not in a hire car,,,,,,

Peter.

i usually start it, wait at least a minute and then drive of gently till the temp gauge reaches normal.
i dont like doing it, but i can never get out of bed early enough to warm the car up properly..
with the bike on the other hand, it never gets ridden in the morning unless its been warming up for at least 3-5 minutes

Have heard that its better to drive off straight away once oil pressure comes up but take it easy - no high revs, no lugging, no full throttle until fully warmed up , not just when temp gauge reaches normal as takes a fair bit longer than that for all internal temps to reach normal operating temps.
Driving will warm the coolant quicker which will tell the EFI to lean out the mixture (ie turn choke off) and reduce oil dilution on cylnder walls.

For best engine life, minimising short trips will have the greatest effect, especially for a diesel.

My 2.8 gets around 5 mins of warm up every morning

If i'm going to work, I get dressed, go outside, start the engine. Then I pack the car, tie the ladder on, have brekky or whatever, and when i'm done drive off. Trying to drive it when cold just feels wrong, the gears don't change as smooth, its louder, sounds rougher, all very slight differences to when it's hot, but I've got a keen ear in my car as I'm always listening for any new 'noises'

Your crazy of you don't give it AT LEAST 1min. More if its a diesel.

if my car wasnt factory imobilised i would have put an engine start alarm in it to warm it up in the mornings..
but my next car will have it in it

RockyF70 wrote:My 2.8 gets around 5 mins of warm up every morning

Trying to drive it when cold just feels wrong, the gears don't change as smooth,.

How does 5 mins of engine time warm the gearbox?
Peter.

but if you pop the transfer in neutral and the gearbox in gear it does.... I have seen crusty types doing this, and have done it myself from time to time.

Steve.

-Scott- wrote:

HotFourOk wrote:I just don't rev it hard until the temp gauge is at the normal position. I start driving right away after starting.

I wait until I have oil pressure and/or the engine check light is gone - then I move off gently.

My oil light goes off in a second or less

Diesels do not have as much power when cold due to incomplete combustion... thats why they feel crapper to drive when cold.

RockyF70 wrote:My 2.8 gets around 5 mins of warm up every morning

Your crazy of you don't give it AT LEAST 1min. More if its a diesel.

I thought you were tight with your fuel Nath 5 Mins, damn
Time is money

droopypete wrote:

RockyF70 wrote:My 2.8 gets around 5 mins of warm up every morning

Trying to drive it when cold just feels wrong, the gears don't change as smooth,.

How does 5 mins of engine time warm the gearbox?
Peter.

I dont know

But i'm going to try what steve said.

I guess there'd be heat transition from the enginne block to the gearbox, but I can just feel it change smoother when its warmed up for a while, compared to when i've only had it running for 30 secs -1min or so.


And Hot4, 5 mins of idling would be less than 20c of fuel a day. But could be thousands of k's more enging life

slick fifty

jonamaphone1 wrote:slick fifty

Is pure snake oil, and it is now illegal for them to include most of their previous claims in ads.

Back on topic, I at least wait until the oil light is off (takes about 5-10 seconds on the ISUZU - minimum pressure is quite high), and another minute or two if I have time. I also take it easy until it is warm.

ISUZUROVER wrote:

jonamaphone1 wrote:slick fifty

Is pure snake oil, and it is now illegal for them to include most of their previous claims in ads.

true? so it doesn't protect your engine from wear for the first few minutes if running?

warm my td42 up usually for 5 minuts or more and drive it real easy till the temp gauge comes up to normal. Not warming up a car, any car, in my opinion is stupid

jonamaphone1 wrote:

ISUZUROVER wrote:

jonamaphone1 wrote:slick fifty

Is pure snake oil, and it is now illegal for them to include most of their previous claims in ads.

true? so it doesn't protect your engine from wear for the first few minutes if running?

It has been proven that the claims of slick50 and many other similar additives were unverifiable. Du-pont (the makers of the PTFE compound) have also told slick50 not to put its name anywhere on its literature or documentation.

I turn the key when I get into the car.
Then I put on my seatbelt and do whatever else I need to do.
Then I drive off.

If I'm by myself the above is done in about 5 secs.
If my wife is with me it might take a few minutes.

I'll take it easy until the gauge says it has warmed up either way. Which doesn't take long in a Rover V8.

My work truck, it's in gear and the clutch is already half engaged during start up so the instant the engine fires i am driving away Hell sometimes the starter motor is half the reason travelling has already begun.

r0ck_m0nkey wrote:My work truck, it's in gear and the clutch is already half engaged during start up so the instant the engine fires i am driving away Hell sometimes the starter motor is half the reason travelling has already begun.

Warming up an engine is actually bad for it!!!! All you need is oil preasure up before driving off easy. The biggest problem with warming up an engine at idle is oil dilution through un burnt fuel and condensation saturating the oil. The un burnt fuel comes from the rich fuel levels of a cold idleing motor slowly heating up and SLOWLY expanding and closing up the tollerences.
Driving off easy heats the engine quicker blows the condensation and rich fuel out the exhaust and is better for the engine.

I warm up the 80. get up shower, dressed, walk out put lunch in the car start it set the turbo timer to 5minutes go inside have breakfast then if I am quick enough I beat the timer before it switches off.

It just will not go without being warmed up for at least a couple of minutes. Even the gear box feels more loose then if I just get in and drive.

The other reason why I leave it for a good 5minutes + is by the time I idle out of my suburb it has warmed up to normal temp, if I do not let it warm up it will not be at normal temp by the time I am on the freeway doing 100+ km/h which I think would be bad for it. I also need (want) to accelerate up the on ramp as it is a bit of a hill.

But who knows I am no expert, maybe a mixture of both is better.

My experience with diesels is in boats and I was told by a very knowledgeable diesel expert that once it is started and everything seems fine to get underway but avoid full load straight away. Long periods of idling to so call "warm up" the engine were detrimental and reduced its life. He explained why but it's so long ago I can't remember the details.

HotFourOk wrote:Diesels do not have as much power when cold due to incomplete combustion... thats why they feel crapper to drive when cold.

Try twin DCOEs with no "choke." Coughs, splutters, farts for a few minutes on a cold morning. I cover a km or so in that time - share the love around the neighbourhood.

EFI getting closer...

I never knew that there were con's about warming up my middy is a lot smoother after a couple of minute's I have always done this with all my cars and always will creature off habit

RockyF70 wrote:

droopypete wrote:

RockyF70 wrote:My 2.8 gets around 5 mins of warm up every morning

Trying to drive it when cold just feels wrong, the gears don't change as smooth,.

How does 5 mins of engine time warm the gearbox?
Peter.

I dont know

But i'm going to try what steve said.

I guess there'd be heat transition from the enginne block to the gearbox, but I can just feel it change smoother when its warmed up for a while, compared to when i've only had it running for 30 secs -1min or so.


And Hot4, 5 mins of idling would be less than 20c of fuel a day. But could be thousands of k's more enging life

When ur engine is runing with the g/box in neutral and ur foot isn't on the clutch the input shaft and cluster shaft r both turning. ie making frition and heat.

droopypete wrote:If the engine is cold I usualy start the engine with my foot all the way to the floor and when it fires I hold my foot down till the valves start to bounce then hold it there for about 5 minutes more (sometimes I use a brick on the throttle) if the engine is already warm I do exactly the same thing.

And when I am not in a hire car,,,,,,

Peter.

Laughed my head off.

droopypete wrote:If the engine is cold I usualy start the engine with my foot all the way to the floor and when it fires I hold my foot down till the valves start to bounce then hold it there for about 5 minutes more (sometimes I use a brick on the throttle) if the engine is already warm I do exactly the same thing.

And when I am not in a hire car,,,,,,

Peter.

Its funny cause our next door neighbour is an old lady that hates us she starts hers the same way the backs out the driveway foot flat to the floor the dumps the clutch wheel spin all the way up the road ... poor little charade

DR Frankenstine wrote:Warming up an engine is actually bad for it!!!! All you need is oil preasure up before driving off easy. The biggest problem with warming up an engine at idle is oil dilution through un burnt fuel and condensation saturating the oil. The un burnt fuel comes from the rich fuel levels of a cold idleing motor slowly heating up and SLOWLY expanding and closing up the tollerences.
Driving off easy heats the engine quicker blows the condensation and rich fuel out the exhaust and is better for the engine.

this is correct. idling is about the worst thing you can do to an engine, hot or cold. For best engine life, start the engine and drive as soon as you have oil pressure, bringing the engine to operating temperature as quickly as possible minimises wear. Not only is oil dilution a problem, but oil pressure is at its lowest at idle and bearing and cam/rocker gear protection can be compromised. Change oild and filter regularly, use a good oil and maintain your air filter. Maintaining your air filter means using a good filter (ie not foam or cotton crap) and only changing it when it needs changing.

there is also a cost benefit from the fuel wastage viewpoint not to mention an environmental advantage.