What would cause the Micra to bang from the front corner over speed bumps? 
As it drops over the top of the bump, if I have to drive right over one, 
there's a thump as though the leg has bottomed out but it does it when it 
goes 'light', IYSWIM, when it's coming off the lump. When it's done it once 
it doesn't tend to do it again and doesn't do it if there's a passenger.

It's recently had new cv joints and track rod ends, which has made no 
difference.

Si

"Mungo "Two Sheds" Toadfoot"  wrote in message 
news:g7muli$hrt$1@registered.motzarella.org...
> What would cause the Micra to bang from the front corner over speed bumps?
Most likely it's the oil sump...
> As it drops over the top of the bump, if I have to drive right over one, 
> there's a thump as though the leg has bottomed out but it does it when it 
> goes 'light', IYSWIM, when it's coming off the lump. When it's done it 
> once it doesn't tend to do it again and doesn't do it if there's a 
> passenger.
Now, the cause would likely to be old non-working shoke absorbers,
though I can not understand your "When it's done it once it doesn't tend to 
do it again" - What? Ever? On the next speed bump? For the next 10 mins?
I am afraid you will need to explain that...
>
> It's recently had new cv joints and track rod ends, which has made no 
> difference.
CV joints AND track rod ends should have NO effect on this...
I would say (again) check your shocks (and maybe springs), unless something 
is actually hanging under your car...
Try to find a quite road and drive over AND STOP once your front wheeels are 
over the bump, look under the car and check what is the point of minimum 
clearance - I suspect [and it should be] an oil sump.
>
> Si
> 


** Posted from http://www.teranews.com **

GArlington wrote:
> "Mungo "Two Sheds" Toadfoot"  wrote in
> message news:g7muli$hrt$1@registered.motzarella.org...
>> What would cause the Micra to bang from the front corner over speed
>> bumps?
> Most likely it's the oil sump...
>> As it drops over the top of the bump, if I have to drive right over
>> one, there's a thump as though the leg has bottomed out but it does
>> it when it goes 'light', IYSWIM, when it's coming off the lump. When
>> it's done it once it doesn't tend to do it again and doesn't do it
>> if there's a passenger.

> Now, the cause would likely to be old non-working shoke absorbers,
> though I can not understand your "When it's done it once it doesn't
> tend to do it again" - What? Ever? On the next speed bump? For the
> next 10 mins? I am afraid you will need to explain that...

It doesn't do it again that journey.

>>
>> It's recently had new cv joints and track rod ends, which has made no
>> difference.
> CV joints AND track rod ends should have NO effect on this...
> I would say (again) check your shocks (and maybe springs), unless
> something is actually hanging under your car...
> Try to find a quite road and drive over AND STOP once your front
> wheeels are over the bump, look under the car and check what is the
> point of minimum clearance - I suspect [and it should be] an oil sump.

No, it's nothing hitting the road. Definitely a suspension noise and 
definitely when the susp. is unloading, i.e. atm or near, full stretch as 
the wheel is dropping away from the body.

All I can think is that something at the top of the leg mount is knackered 
but I don't know what's replaceable in there.

Si

On Aug 10, 11:36 pm, "Mungo \"Two Sheds\" Toadfoot"
 wrote:
> GArlington wrote:
> > "Mungo "Two Sheds" Toadfoot"  wrote in
> > messagenews:g7muli$hrt$1@registered.motzarella.org...
> >> What would cause the Micra to bang from the front corner over speed
> >> bumps?
> > Most likely it's the oil sump...
> >> As it drops over the top of the bump, if I have to drive right over
> >> one, there's a thump as though the leg has bottomed out but it does
> >> it when it goes 'light', IYSWIM, when it's coming off the lump. When
> >> it's done it once it doesn't tend to do it again and doesn't do it
> >> if there's a passenger.
> > Now, the cause would likely to be old non-working shoke absorbers,
> > though I can not understand your "When it's done it once it doesn't
> > tend to do it again" - What? Ever? On the next speed bump? For the
> > next 10 mins? I am afraid you will need to explain that...
>
> It doesn't do it again that journey.
Do you have electric/hydrolic adjustable shock absorbers?
If not, I have no idea why something would happen only once during the
journey and only happen again after you turn the car off and on
again...
>
>
>
> >> It's recently had new cv joints and track rod ends, which has made no
> >> difference.
> > CV joints AND track rod ends should have NO effect on this...
> > I would say (again) check your shocks (and maybe springs), unless
> > something is actually hanging under your car...
> > Try to find a quite road and drive over AND STOP once your front
> > wheeels are over the bump, look under the car and check what is the
> > point of minimum clearance - I suspect [and it should be] an oil sump.
>
> No, it's nothing hitting the road. Definitely a suspension noise and
> definitely when the susp. is unloading, i.e. atm or near, full stretch as
> the wheel is dropping away from the body.
>
> All I can think is that something at the top of the leg mount is knackered
> but I don't know what's replaceable in there.
If it were to be a leg mount (or in fact anything mechanical) it would
not happen only once per journey...
I would guess it is something that is switched on when the car is
started, getting stuck and un-sticking only after the first bump...
>
> Si

fast_cars_guy wrote:

> Do you have electric/hydrolic adjustable shock absorbers?
> If not, I have no idea why something would happen only once during the
> journey and only happen again after you turn the car off and on
> again...

Bizarre, isn't it? No, no poncy suspension. It's quite a loud bang too. All 
I could think was that something at the top of the leg settled overnight and 
put itself out of location, as it were, then it relocates when the leg is 
pulled down when the wheel drops off a speed bump or summat and stays there 
until next time. *Shrug*

Si

On Wed, 13 Aug 2008 18:23:55 +0100, Mungo "Two Sheds" Toadfoot  
 wrote:

> fast_cars_guy wrote:
>
>> Do you have electric/hydrolic adjustable shock absorbers?
>> If not, I have no idea why something would happen only once during the
>> journey and only happen again after you turn the car off and on
>> again...
>
> Bizarre, isn't it? No, no poncy suspension. It's quite a loud bang too.  
> All
> I could think was that something at the top of the leg settled overnight  
> and
> put itself out of location, as it were, then it relocates when the leg is
> pulled down when the wheel drops off a speed bump or summat and stays  
> there
> until next time. *Shrug*
>
> Si
>
>
>


Loose strut insert?

We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember "Mungo \"Two Sheds\" Toadfoot"
 saying something like:

>Bizarre, isn't it? No, no poncy suspension. It's quite a loud bang too. All 
>I could think was that something at the top of the leg settled overnight and 
>put itself out of location, as it were, then it relocates when the leg is 
>pulled down when the wheel drops off a speed bump or summat and stays there 
>until next time. *Shrug*

I've had mysterious rattling clonks coming from the top of struts if
there's been a loose nut under the top cap. Sometimes it's just wear.
-- 

Dave
SE6a

Grimly Curmudgeon wrote:
> We were somewhere around Barstow, on the edge of the desert, when the
> drugs began to take hold. I remember "Mungo \"Two Sheds\" Toadfoot"
>  saying something like:
>
>> Bizarre, isn't it? No, no poncy suspension. It's quite a loud bang
>> too. All I could think was that something at the top of the leg
>> settled overnight and put itself out of location, as it were, then
>> it relocates when the leg is pulled down when the wheel drops off a
>> speed bump or summat and stays there until next time. *Shrug*
>
> I've had mysterious rattling clonks coming from the top of struts if
> there's been a loose nut under the top cap. Sometimes it's just wear.

Probably is just wear. Nothing's fallen off and it still goes round corners 
so it can't be that bad.

Si

We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember "Mungo \"Two Sheds\" Toadfoot"
 saying something like:

>Probably is just wear. Nothing's fallen off and it still goes round corners 
>so it can't be that bad.

Famous last words, eh? Still, fingers crossed for you and all that...
-- 

Dave
SE6a