[xj40] Noise from rear shock absorber XJ40 3.2 '94

Hello,
I am experiancing a knock noise when driving over uneaven road, and
here in Belgium we have a lot…
I went through almost every post there is on this topic, and did
the following.
I replaced the shock absorber upper busings, altough they looked
fine, and changed the rear subframe front bushings.
The noise changed a little bit, sounds like it lowered.
The isolator between spring and body also looks fine.
The rubber isolator between lower control arm and springs also
looks fine.

I am wandering if the noise could be generated in the shock
absorber itself??
I can not reproduce the noise by pusing down the rear of the car,
probably I can not push it down fast enough.

The bushings from the rear silencers also look ok.

I am a bit lost here.

Thanks in advance for your help!–
Saint1
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In reply to a message from Saint1 sent Sat 11 Jul 2009:

I gather from your description that your car is post- VIN
696460 - i.e. with the rear spring lower mount directly on
to the lower control arm, X300 style?

Have you checked the spherical joint in the lower mounting
of the shock absorber or in fact that the shock on your car
does have that type of joint as opposed to the ‘solid’
silentbloc bush on the shocks on earlier cars?

I believe that without that spherical joint, the shocks can
become noisy and even snap the piston rod.–
The original message included these comments:

I replaced the shock absorber upper busings, altough they looked
fine, and changed the rear subframe front bushings.
The noise changed a little bit, sounds like it lowered.
The isolator between spring and body also looks fine.
The rubber isolator between lower control arm and springs also
looks fine.
I am wandering if the noise could be generated in the shock
absorber itself??


Bryan N, '91 Sovereign 4.0 L, RHD
Cambridgeshire, United Kingdom
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In reply to a message from Bryan N sent Sat 11 Jul 2009:

Hello Bryan,
Thanks for the reply.

You are right, she has the suspension as it is used on the X300.
Yes I have checked the bushes. There is nothing suspected to create
the noise. I also was looking for metal to metal contact, nothing
found.
The noise has a frequency of about max. 5 knock/ second. Depending
of the road.–
Saint1
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In reply to a message from Saint1 sent Sun 12 Jul 2009:

I found the cause for the noise yesterday.
The noise is comming from the lower shock absorber bush.
I checked it 2 times and could not see any issues last week.
Hence, my question: can I buy this part seperate ilo buying a
complete shock absorber?–
Saint1
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In reply to a message from Saint1 sent Tue 14 Jul 2009:

That is the part I suggested may be at fault in my earlier
response.

It is called a ‘Spherical Joint’ and the part number is CCC6782.

The only doubt may be if your car does not have the correct
shocks fitted (if they have been changed since it left the
factory) to suit the X300 type rear suspension.
Other wise, this is one source :- (no affiliation!)

http://www.jagspares.co.uk/Manners/PartView.asp?partno=CCC6782&imageField.x=32&imageField.y=10&imageField=submit&perpage=10--
The original message included these comments:

I found the cause for the noise yesterday.
The noise is comming from the lower shock absorber bush.
I checked it 2 times and could not see any issues last week.
Hence, my question: can I buy this part seperate ilo buying a
complete shock absorber?


Bryan N, '91 Sovereign 4.0 L, RHD
Cambridgeshire, United Kingdom
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In reply to a message from Bryan N sent Tue 14 Jul 2009:

Bryan,
I am sorry, I was not familiar with the word.
We call it here unibal…
The shock which is under my car is an original Jaguar one
(Bilstein, MMB3541AA)

Damn expensive for the part.
Do you know if tis part can be changed while the shock is still in
the car?
With the bolt loose and the car in normal ride hight, the lower
part of the shock comes down +/- 5cm.

Looking on Ebay; the Boghe shocks can be purchased for 75�/pce.

Many thanks for your help!–
Saint1
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In reply to a message from Saint1 sent Wed 15 Jul 2009:

Don’t know the answer to that - I don’t have that type on my
car.

Found this picture from another source - you may be able to
press it out and replace it using the usual combination of
bolts, washers and old sockets.

http://www.sngbarratt.com/catalogue/parts/show.asp?id=18588&keys=CCC6782&modelfamilyid=&categoryid=&stype=1&pagepos=0&back=n--
The original message included these comments:

Do you know if tis part can be changed while the shock is still in
the car?


Bryan N, '91 Sovereign 4.0 L, RHD
Cambridgeshire, United Kingdom
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
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