Adrian Higdon

Help?

I have a knocking noise coming from the left hand rear of my 99 XJR. It has
been gradually getting worse.

It only happens when travelling over uneven road surfaces, seems to be all
the time on UK roads.

I have checked boot area and nothing is rattling or loose there.

I think it is something in the rear suspension, but I have just took it for
its annual MOT and it passed with no problems and the chap couldn't find
anything loose or with excessive play.

I realise it could be a number of things but I wondered whether there is
something common that it could be?

Any thoughts / help muchly appreciated.

Thanks

Adrian

EdFielder

Check your rubber tailpipe mount

"Adrian Higdon" <adrian.higdon@ntlworld.com> wrote in message
news:JkUCe.2708$Oe4.427@newsfe3-gui.ntli.net...
> Help?
>
> I have a knocking noise coming from the left hand rear of my 99 XJR. It
has
> been gradually getting worse.
>
> It only happens when travelling over uneven road surfaces, seems to be all
> the time on UK roads.
>
> I have checked boot area and nothing is rattling or loose there.
>
> I think it is something in the rear suspension, but I have just took it
for
> its annual MOT and it passed with no problems and the chap couldn't find
> anything loose or with excessive play.
>
> I realise it could be a number of things but I wondered whether there is
> something common that it could be?
>
> Any thoughts / help muchly appreciated.
>
> Thanks
>
> Adrian
>
>
>
>
>

David Wilson

Try checking the stiffness of the ehaust mounting at the back - pipe rune
close to the body that side & is v heavy, so not much excess play needed to
allow pipe & body to clash - noisily!


"Adrian Higdon" <adrian.higdon@ntlworld.com> wrote in message
news:JkUCe.2708$Oe4.427@newsfe3-gui.ntli.net...
> Help?
>
> I have a knocking noise coming from the left hand rear of my 99 XJR. It
has
> been gradually getting worse.
>
> It only happens when travelling over uneven road surfaces, seems to be all
> the time on UK roads.
>
> I have checked boot area and nothing is rattling or loose there.
>
> I think it is something in the rear suspension, but I have just took it
for
> its annual MOT and it passed with no problems and the chap couldn't find
> anything loose or with excessive play.
>
> I realise it could be a number of things but I wondered whether there is
> something common that it could be?
>
> Any thoughts / help muchly appreciated.
>
> Thanks
>
> Adrian
>
>
>
>
>

Adrian Higdon

Thanks for teh two suggestions on checking the exhaust mounting, I had
checked and couldnt seem to get enough play to cause a noise but i am going
to get her up at the weekend and take a thorough look at all the back end. i
will pay particular attention to the exhaust mounts.

Thanks again. Will advise if the weekend resolves it.


"David Wilson" <david.wilson@maybe.pipex.com> wrote in message
news:42dd75ac$0$6475$cc9e4d1f@news-text.dial.pipex.com...
> Try checking the stiffness of the ehaust mounting at the back - pipe rune
> close to the body that side & is v heavy, so not much excess play needed
> to
> allow pipe & body to clash - noisily!
>
>
> "Adrian Higdon" <adrian.higdon@ntlworld.com> wrote in message
> news:JkUCe.2708$Oe4.427@newsfe3-gui.ntli.net...
>> Help?
>>
>> I have a knocking noise coming from the left hand rear of my 99 XJR. It
> has
>> been gradually getting worse.
>>
>> It only happens when travelling over uneven road surfaces, seems to be
>> all
>> the time on UK roads.
>>
>> I have checked boot area and nothing is rattling or loose there.
>>
>> I think it is something in the rear suspension, but I have just took it
> for
>> its annual MOT and it passed with no problems and the chap couldn't find
>> anything loose or with excessive play.
>>
>> I realise it could be a number of things but I wondered whether there is
>> something common that it could be?
>>
>> Any thoughts / help muchly appreciated.
>>
>> Thanks
>>
>> Adrian
>>
>>
>>
>>
>>
>
>

Blake Dodson

Hmmm.

My car had a strange knock on rough roads and it turned out to be a
defective shock absorber (damper).

Blake

webserve

I agree with Blake. While I am not familiar with the '99 XJR set-up, I have
had knocking sounds from both the front and the rear shocks on my XJ40
because the rubber separators had deteriorated to the point metal was
hitting metal. It started as a dull thud and increased in intensity
proportional to the deterioration.

Webserve


"Blake Dodson" <dieinterim@comcast.net> wrote in message
news:1121870044.721936.6620@g14g2000cwa.googlegroups.com...
> Hmmm.
>
> My car had a strange knock on rough roads and it turned out to be a
> defective shock absorber (damper).
>
> Blake
>

Mike Smith

I had expensive noise from rear on same model - all occupants agreed on the
source and the likely cost.
I'm still gobsmacked because it turned out to be the sunshine roof panal
riding up and down on the roof. A finger run round the edge of the opening
with silicone oil effected permanent cure - still can't believe it!

"webserve" <webserve00@hotmail.com> wrote in message
news:da7c1$42de6d4b$45282aa5$14594@ALLTEL.NET...
>I agree with Blake. While I am not familiar with the '99 XJR set-up, I
>have
> had knocking sounds from both the front and the rear shocks on my XJ40
> because the rubber separators had deteriorated to the point metal was
> hitting metal. It started as a dull thud and increased in intensity
> proportional to the deterioration.
>
> Webserve
>
>
> "Blake Dodson" <dieinterim@comcast.net> wrote in message
> news:1121870044.721936.6620@g14g2000cwa.googlegroups.com...
>> Hmmm.
>>
>> My car had a strange knock on rough roads and it turned out to be a
>> defective shock absorber (damper).
>>
>> Blake
>>
>
>

Adrian Higdon

Mike,

Thanks for suggestion however mine doesnt have the sunshine roof, so that
counts it out.

But thanks for your suggestion.

I am inclined to think its probably the damper at the moment, but will have
a look under her at the weekend.

Adrian


"Mike Smith" <mikes66@ntlworld.com> wrote in message
news:GzyDe.9118$vv6.4097@newsfe6-gui.ntli.net...
> I had expensive noise from rear on same model - all occupants agreed on
> the source and the likely cost.
> I'm still gobsmacked because it turned out to be the sunshine roof panal
> riding up and down on the roof. A finger run round the edge of the
> opening with silicone oil effected permanent cure - still can't believe
> it!
>
> "webserve" <webserve00@hotmail.com> wrote in message
> news:da7c1$42de6d4b$45282aa5$14594@ALLTEL.NET...
>>I agree with Blake. While I am not familiar with the '99 XJR set-up, I
>>have
>> had knocking sounds from both the front and the rear shocks on my XJ40
>> because the rubber separators had deteriorated to the point metal was
>> hitting metal. It started as a dull thud and increased in intensity
>> proportional to the deterioration.
>>
>> Webserve
>>
>>
>> "Blake Dodson" <dieinterim@comcast.net> wrote in message
>> news:1121870044.721936.6620@g14g2000cwa.googlegroups.com...
>>> Hmmm.
>>>
>>> My car had a strange knock on rough roads and it turned out to be a
>>> defective shock absorber (damper).
>>>
>>> Blake
>>>
>>
>>
>
>

Vlad

On Wed, 20 Jul 2005 23:02:36 GMT, "Adrian Higdon"
<adrian.higdon@ntlworld.com> wrote:

>Mike,
>
>Thanks for suggestion however mine doesnt have the sunshine roof, so that
>counts it out.
>
>But thanks for your suggestion.
>
>I am inclined to think its probably the damper at the moment, but will have
>a look under her at the weekend.
>
>Adrian
>
>
>"Mike Smith" <mikes66@ntlworld.com> wrote in message
>news:GzyDe.9118$vv6.4097@newsfe6-gui.ntli.net...
>> I had expensive noise from rear on same model - all occupants agreed on
>> the source and the likely cost.
>> I'm still gobsmacked because it turned out to be the sunshine roof panal
>> riding up and down on the roof. A finger run round the edge of the
>> opening with silicone oil effected permanent cure - still can't believe
>> it!
>>
>> "webserve" <webserve00@hotmail.com> wrote in message
>> news:da7c1$42de6d4b$45282aa5$14594@ALLTEL.NET...
>>>I agree with Blake. While I am not familiar with the '99 XJR set-up, I
>>>have
>>> had knocking sounds from both the front and the rear shocks on my XJ40
>>> because the rubber separators had deteriorated to the point metal was
>>> hitting metal. It started as a dull thud and increased in intensity
>>> proportional to the deterioration.
>>>
>>> Webserve
>>>
>>>
>>> "Blake Dodson" <dieinterim@comcast.net> wrote in message
>>> news:1121870044.721936.6620@g14g2000cwa.googlegroups.com...
>>>> Hmmm.
>>>>
>>>> My car had a strange knock on rough roads and it turned out to be a
>>>> defective shock absorber (damper).
>>>>
>>>> Blake
>>>>
>>>
On my friend's Prelude, it was a golf boll in the trunk


>>
>>
>

Graham L

"Vlad" <Vlad@dot.com> wrote in message
news:negvd1hugepaamlnud2sen0t17h7qimi70@4ax.com...
> On Wed, 20 Jul 2005 23:02:36 GMT, "Adrian Higdon"
> <adrian.higdon@ntlworld.com> wrote:
>
> On my friend's Prelude, it was a golf boll in the trunk


Then there's the story of the loose nuts and bolts or even Coke bottle
welded up inside body sections on the production line.

Graham L