cannot remove crankshaft nut on Vauxhall Vectra 2.0DTi on a 53 reg plate
Graham Brooker
sheared (well known problem) and my mechanic is having difficulty removing
the crankshaft nut that holds the pulley in place. Vauxhall tech support
tells him to keep persevering with his air powered breaker wrench designed
for a lorry (he burnt one out and had to replace it). They say it is a
normal RH thread and it could take hours of work with an air tool to loosen
it as it tightens up in use and has a locking fluid holding it in place. He
does not want to heat it as it would damage the oil seal and pump behind.
He is scared to freeze the crankshaft end as it could weaken the metal. He
is worried about whacking it with a long bar on the wrench.
Has anyone got any ideas. Graham
Mrcheerful
3 quarter drive socket on a BFO breaker bar and turn the key.
Duncan Wood
Get a new mechanic with a bigger compressor and a decent air wrench.
Rob
Get a socket and a bar on the nut then a couple of quick turns of the
key. Bar up against part of the car/block of wood. Should move the bolt.
Graham 2
news:Rz0Bo.85550$Dv.3...@newsfe07.ams2...
As I found out accidentally once when turning the engine by hand to set up
the points gap on my old allegro !
(left the nut/bar on the pulley !)
Graham
Rob
this is an accepted method in workshops see my other post
Dave Plowman (News)
Duncan Wood <dun...@dmx512.co.uk> wrote:
> Get a new mechanic with a bigger compressor and a decent air wrench.
My thoughts too. An impact device is ideal for such things. But you want
one which can produce a deal of 'momentary' torque. Like about 300 ft.lb.
--
*Support bacteria - they're the only culture some people have *
Dave Plowman da...@davenoise.co.uk London SW
To e-mail, change noise into sound.
Mrcheerful
> In article <op.vlssx...@newsony.gateway.2wire.net>,
> Duncan Wood <dun...@dmx512.co.uk> wrote:
>> Get a new mechanic with a bigger compressor and a decent air wrench.
>
> My thoughts too. An impact device is ideal for such things. But you
> want one which can produce a deal of 'momentary' torque. Like about
> 300 ft.lb.
the impact wrench I have supposedly knocks out 600 ftlb in reverse, yet I
have still come across stuff it can't move, generally a 4 ft scaffold pole
plus my weight is enough for those odd occasions.
Duncan Wood
wrote:
That's against a rigid object though, any spring in the system
dramatically reduces the torque applied by an impact wrench.
Mrcheerful
what is frightening is that I have come across wheel nuts that it hasn't
shifted, yet it almost always gets crank shaft nuts.
Dave Plowman (News)
Duncan Wood <dun...@dmx512.co.uk> wrote:
> On Wed, 10 Nov 2010 21:50:47 -0000, Mrcheerful <nbk...@hotmail.co.uk>
> wrote:
> > Dave Plowman (News) wrote:
> >> In article <op.vlssx...@newsony.gateway.2wire.net>,
> >> Duncan Wood <dun...@dmx512.co.uk> wrote:
> >>> Get a new mechanic with a bigger compressor and a decent air wrench.
> >>
> >> My thoughts too. An impact device is ideal for such things. But you
> >> want one which can produce a deal of 'momentary' torque. Like about
> >> 300 ft.lb.
> >
> > the impact wrench I have supposedly knocks out 600 ftlb in reverse,
> > yet I have still come across stuff it can't move, generally a 4 ft
> > scaffold pole plus my weight is enough for those odd occasions.
> >
> >
> That's against a rigid object though, any spring in the system
> dramatically reduces the torque applied by an impact wrench.
An impact wrench relies on the *mass* of the object. A spanner of any type
is far more influenced by 'spring' in the system.
--
*I see you've set aside this special time to humiliate yourself in public
Duncan Wood
<da...@davenoise.co.uk> wrote:
> In article <op.vl0wt01ycet1rb@newsony>,
> Duncan Wood <dun...@dmx512.co.uk> wrote:
>> On Wed, 10 Nov 2010 21:50:47 -0000, Mrcheerful <nbk...@hotmail.co.uk>
>> wrote:
>
>> > Dave Plowman (News) wrote:
>> >> In article <op.vlssx...@newsony.gateway.2wire.net>,
>> >> Duncan Wood <dun...@dmx512.co.uk> wrote:
>> >>> Get a new mechanic with a bigger compressor and a decent air wrench.
>> >>
>> >> My thoughts too. An impact device is ideal for such things. But you
>> >> want one which can produce a deal of 'momentary' torque. Like about
>> >> 300 ft.lb.
>> >
>> > the impact wrench I have supposedly knocks out 600 ftlb in reverse,
>> > yet I have still come across stuff it can't move, generally a 4 ft
>> > scaffold pole plus my weight is enough for those odd occasions.
>> >
>> >
>
>> That's against a rigid object though, any spring in the system
>> dramatically reduces the torque applied by an impact wrench.
>
> An impact wrench relies on the *mass* of the object.
Which needs to be rigidly attached.
> A spanner of any type
> is far more influenced by 'spring' in the system.
>
A spnner doesn't care, you have to turn it further but the torque applied
is still proprtional to how hard you push it & how far away, what the
bolts attached to doesn't influence it.
Dave Plowman (News)
Duncan Wood <nntp...@dmx512.co.uk> wrote:
> >> That's against a rigid object though, any spring in the system
> >> dramatically reduces the torque applied by an impact wrench.
> >
> > An impact wrench relies on the *mass* of the object.
> Which needs to be rigidly attached.
Like a crankshaft?
> > A spanner of any type
> > is far more influenced by 'spring' in the system.
> >
> A spnner doesn't care, you have to turn it further but the torque
> applied is still proprtional to how hard you push it & how far away,
> what the bolts attached to doesn't influence it.
The torque will be opposed by any spring.
--
*If a thing is worth doing, wouldn't it have been done already?
Duncan Wood
<da...@davenoise.co.uk> wrote:
> In article <op.vl4iq...@lucy.cable.virginmedia.net>,
> Duncan Wood <nntp...@dmx512.co.uk> wrote:
>> >> That's against a rigid object though, any spring in the system
>> >> dramatically reduces the torque applied by an impact wrench.
>> >
>> > An impact wrench relies on the *mass* of the object.
>
>> Which needs to be rigidly attached.
>
> Like a crankshaft?
>
I'd expect one of those to be rigid.
>> > A spanner of any type
>> > is far more influenced by 'spring' in the system.
>> >
>
>> A spnner doesn't care, you have to turn it further but the torque
>> applied is still proprtional to how hard you push it & how far away,
>> what the bolts attached to doesn't influence it.
>
> The torque will be opposed by any spring.
>
Yes, but that won't reduce it, it'll just increase the angle you have to
turn it through. The force remains the same.
Duncan Wood
wrote:
I've burst a 6point Elora socket on a wheel bolt with a long bar, some
people really don't understand that overtightning thinss is a bad idea.