Wheel spinning while car jacked w/ engine running???.....

Al Capwned

Was changing the oil on my dads car (06 Kia Rio 1.4) today, had car running to heat oil, and jacked car up on drivers side.

• Front wheels started spinning!!!! Reading about 10kph on speedo.
• Car in Neutral
• So stopped one of them with my hand - started spinning again.
• Spun it backwards - started spinning again.

What in the name of Jaysus is going on with that? Any ideas, anyone?
Thanks,
Al.:)

-Corkie-

Thats the oil in the gearbox doing that. The drives in the box are spinning the oil around very fast hence it turns the wheels.

MugMugs

Auto and in drive ?

peasant

Darwin award in the making, that's what's going on

Jacking a running car, that's a bit stupid

Al Capwned

Manual....

Ok - oil in gearbox - never seen it before on ANY car / van i've owned/worked on. Is it something to be concerned about? Is it normal?

Al Capwned

peasant wrote: »

Darwin award in the making, that's what's going on

Jacking a running car, that's a bit stupid

2 wheels chocked, and jacked it up while waiting for oil to heat - don't see anything dangerous about that at all....

-Corkie-

alproctor wrote: »

Manual....

Ok - oil in gearbox - never seen it before on ANY car / van i've owned/worked on. Is it something to be concerned about? Is it normal?

It happens in every vehicle with an engine and gearbox unless of course you drop the oil out of the box but that wouldnt be a great idea.

Al Capwned

-Corkie- wrote: »

It happens in every vehicle with an engine and gearbox unless of course you drop the oil out of the box but that wouldnt be a great idea.

Of course not - so just to be clear - This is not something I should be telling my 70y.o. father about (i.e. nothing to worry about)

MugMugs

alproctor wrote: »

Of course not - so just to be clear - This is not something I should be telling my 70y.o. father about (i.e. nothing to worry about)

No OP. It's normal

Gary ITR

alproctor wrote: »

Of course not - so just to be clear - This is not something I should be telling my 70y.o. father about (i.e. nothing to worry about)

It's perfectly normal fella

Al Capwned

Sound lads....
Just can't understand why I've never seen it happen before.

CiniO

peasant wrote: »

Darwin award in the making, that's what's going on

Jacking a running car, that's a bit stupid

Any reason why?

CiniO

CiniO wrote: »

Any reason why?

Don't see too much wrong with it either to be honest.

galwaytt

RoverJames wrote: »

Don't see too much wrong with it either to be honest.

....whilst I agree that it's daunting looking, with gearbox in neutral etc, it shouldn't be an issue.

However, it's with the engine running, that if something did go wrong.........that thing's would be worse.

For instance (and I'm kind nit-picking...)
Engine running, the car vibrates, and I'd be afraid it'd slip/move of the axle stands/jack.
I'd be afraid of getting something caught in a moving pulley - a sleeve, arm, hand, hair, w.h.y. a black pulley, spinning, look's like a black pulley........not spinning.
And, on a Renault, say, the gear linkage underneath is very exposed........knock that and....well......

I'd much rather not take the risk, tbh. Why not run the car around the block. Or, leave it on the ground running - the oil won't cool instantly you know!!

Of course, I could just be an old fart.

peasant

CiniO wrote: »

Any reason why?

As galwaytt said ...nothing should go wrong, in principle ...but if it did, the consequnces would be so much more severe.

You just don't jack running cars / run jacked cars the same way you don't work on electrics without pulling the plug/fuse.
A sensible precaution and no real inconvenience.

dr.fuzzenstein

peasant wrote: »

Darwin award in the making, that's what's going on

Jacking a running car, that's a bit stupid

In theory you should be able to jack just one wheel, put the car in gear and let the clutch out.
If the diff is doing it's job, the jacked wheel will start to spin, while the one on the ground will remain stationary.
Don't try this at home kids, and especially not with a car with a limited slip/locked diff.:eek:
As I said, in theory, one day I might decide to try that, but only with a car I don't care about and nothing in front of it.:D

mickdw

To be honest, wheels will be inclined to spin even on non driven axles if hanging free in the air due to vibration and frequencies etc.

peasant

peasant wrote: »

As galwaytt said ...nothing should go wrong, in principle ...but if it did, the consequnces would be so much more severe.

You just don't jack running cars / run jacked cars the same way you don't work on electrics without pulling the plug/fuse.
A sensible precaution and no real inconvenience.

Point taken but not a great analogy really.

Stinicker

You sure you weren't trying to roll back the clock by running the car high speed in reverse :P

https://www.youtube.com/watch?v=OX1Yj-fhiTA

CiniO

galwaytt wrote: »

Engine running, the car vibrates, and I'd be afraid it'd slip/move of the axle stands/jack.

If the enigne vibrations could knock the car down from the jack, I would just think about getting better jack, as with engine or without such one would be dangerous anyway.

I'd be afraid of getting something caught in a moving pulley - a sleeve, arm, hand, hair, w.h.y. a black pulley, spinning, look's like a black pulley........not spinning.

Why would you put anything towards the pulleys.
Has nothing to do with car being jacked or not.
The same you can put your hand into the pulley while doing something under the bonnet while engine is running.
That's a reason to be careful with pulley while engine running, but not to avoid lifting a car on the jack while running.

And, on a Renault, say, the gear linkage underneath is very exposed........knock that and....well......

And well what?
The lifted wheel starts rolling, and nothing happens.

CiniO

peasant wrote: »

As galwaytt said ...nothing should go wrong, in principle ...but if it did, the consequnces would be so much more severe.

You just don't jack running cars / run jacked cars the same way you don't work on electrics without pulling the plug/fuse.
A sensible precaution and no real inconvenience.

Really - I can't see any more danger in leaving car with engine running while lifted on jack, comparing to leaving the car running with all 4 wheels on the ground.
Absolutely the same thing.

CiniO

dr.fuzzenstein wrote: »

In theory you should be able to jack just one wheel, put the car in gear and let the clutch out.
If the diff is doing it's job, the jacked wheel will start to spin, while the one on the ground will remain stationary.

That's not only in theory.
That's how it works (unless you've got locked diff or 4wd).

I've done it plenty of times.

Al Capwned

CiNiO- The Voice of Reason....

n97 mini

My car does the same. As pointed out, it's normal.

It's called viscous coupling, and is the principle by which cars with automatic gearboxes and no clutches are able to stand still, and creep forward when the brakes aren't applied.

dr.fuzzenstein

CiniO wrote: »

That's not only in theory.
That's how it works (unless you've got locked diff or 4wd).

I've done it plenty of times.

Let's see if that can be taken a step further.
Jack her up on one side and take her through the gears, will she reach to whack (without leaving a car shaped hole in the garage wall)?:D

kona

No doubt some jackass has done this in a BMW.:rolleyes:

Besides, when changing out my sump plug is at the front of the engine, so jacking the car up at the front is pointless

Sure while its up on jacks stick it in reverse and watch the clock go back.



I think its a darwin award too, especially with one wide of the car jacked.

Fishtits

I can't believe something so basic has gone to two pages...

As my Great Great Grandmother used to say... Jesus Wept...