I all - I have a 93 XJ40 that when riding over certain bumps in the road
will exhibit a loud clunk that seems to emit from the right front wheel. I
have looked at all of the suspension components and it appears that
everything is okay. any ideas?
Bill H 93 white XJ40 108k
William C. Heuerman
Northrop Grumman Corporation
Electronic Sensors and Systems Sector
*desk (410)765-1814 lab (410)765-8751
pager (410)541-0352 fax (410)981-2362
*email: @Heuerman_William_C
Bill,
If you look way up into the fender wheel well you will see a polypropelyne
bushing that surrounds your front shock rod as it goes through the wheel
well. There is another bushing on the engine compartment side.
When I had my “thunk” sound from going over certain potholes and bumps,
it was caused by the play from this bushing having shrunk. Once I replaced
all 4, I never heard the “thunk” again. A VERY easy item to change.
Just a thought
Clark
'88 XJ40----- Original Message -----
From: “Heuerman, William C.” william_c_heuerman@md.northgrum.com
To: “‘jag-list’” xj40@jag-lovers.org
Sent: Wednesday, May 01, 2002 8:48 AM
Subject: [xj40] front end clunk
I all - I have a 93 XJ40 that when riding over certain bumps in the road
will exhibit a loud clunk that seems to emit from the right front wheel.
I
have looked at all of the suspension components and it appears that
everything is okay. any ideas?
Bill H 93 white XJ40 108kWilliam C. Heuerman
Northrop Grumman Corporation
Electronic Sensors and Systems Sector
*desk (410)765-1814 lab (410)765-8751
pager (410)541-0352 fax (410)981-2362
*email: william_c_heuerman@md.northgrum.com
William wrote -
CLIP << I have a 93 XJ40 that when riding over certain bumps in the road
will exhibit a loud clunk that seems to emit from the right front wheel. I
have looked at all of the suspension components and it appears that
everything is okay. any ideas?>> END CLIP
William - Do you have the original yellow/orange shock bushings ?? Could be the
problem. I had similar symptoms on my '88 a month or two ago, and replaced the
old upper shock bushings w/ the new, “soft”, black foam type, and haven’t had
the problem since. Very inexpensive, and not very time consuming - I’ve read
about some folks having done this in 10 minutes/shock. Took me over an hour,
though.
I had a left side “selective clunk” on my '90, which I resolved by changing out
the shocks (did both sides) as I had the wheels & everything else disassembled
for the rotors and bearings, and because they had more miles on 'em then Apollo
11.
Best Regards,
John
'88 XJ40
'90 VDP - post alignment test drive in a few hours.
Re Williams e-mail----
I, too, have a 93 XJ40 with a right front clunk most
noticable at low speed. I’ve changed shocks to no
avail.
All bushings appear sound and I can find no “play”
anywhere…very frustraing! I plan to change the poly
bushes at top of shock (even though new) to see if
that might help.
Roy
61k miles__________________________________________________
Do You Yahoo!?
Yahoo! Health - your guide to health and wellness
Same here - I have developed a clunk from the driver’s side front. My
shocks are nice and tight up top, so that’s not the problem. Besides, if
they are loose, the result is more of a rattle than a clunk. I checked the
brake assemblies, and they look OK
I have looked all around underneath for a bad bushing, and they also look
OK. Trouble is, I am not sure you can tell that way.
Does someone have a good procedure for doing the checks?
Dave
At 12:38 PM 5/1/02 -0700, you wrote:
Re Williams e-mail----
I, too, have a 93 XJ40 with a right front clunk most
noticable at low speed. I’ve changed shocks to no
avail.
All bushings appear sound and I can find no “play”
anywhere…very frustraing! I plan to change the poly
bushes at top of shock (even though new) to see if
that might help.
Roy
61k miles
Do You Yahoo!?
Yahoo! Health - your guide to health and wellness
http://health.yahoo.com
David Hurlston
ViaData LP
I had a similar clunk on my '94 that only went away after I checked and
tightened the wheel bearings. Don’t know - but may be related.
Ron
94 XJ6 (For Sale)
97 XK8
At 12:38 PM 5/1/02 -0700, you wrote:
Re Williams e-mail----
I, too, have a 93 XJ40 with a right front clunk most
noticable at low speed. I’ve changed shocks to no
avail.
All bushings appear sound and I can find no “play” anywhere…very
frustraing! I plan to change the poly bushes at top of shock (even
though new) to see if that might help.
Roy
61k miles
Do You Yahoo!?
Yahoo! Health - your guide to health and wellness
http://health.yahoo.com
David Hurlston
ViaData LP
bear in mind that I am a complete numpty at anything mechanical, but I too
had similar clunks and it disappeared when I paid my mechanic a fiver to
change all the “bump stops” under the car (little rubber things). Not much
help I know, but it worked for me!
L
1990 LPG Sov - 112k miles-----Original Message-----
From: Roy Raymond [mailto:royaraymond@yahoo.com]
Sent: 01 May 2002 20:38
To: xj40@jag-lovers.org
Subject: [xj40] front end clunk
Re Williams e-mail----
I, too, have a 93 XJ40 with a right front clunk most
noticable at low speed. I’ve changed shocks to no
avail.
All bushings appear sound and I can find no “play”
anywhere…very frustraing! I plan to change the poly
bushes at top of shock (even though new) to see if
that might help.
Roy
61k miles
Do You Yahoo!?
Yahoo! Health - your guide to health and wellness
I had similar noises, even after replacing shocks, wheel bearings,
spindles, ball joints, upper control arm bushings.
The noise went away when I replaced the lower control arm bushings, which
looked fine prior to replacement. They a little difficult to replace
because spring needing to be compressed, I made a spring compressor using
5/8" all thread.
Good luck,
Kirk
'89 xj40
'96 VDP
It’s probably the upper shock bushing, but, just to muddy the water,
front end clunking in my '89 was cured by new upper A arm bushings. I
also recall having a lower shock fastener on my Xj12 loosen a bit after I
changed the shocks and that caused a slight clunk. The fastener seemed
tight enough, but a bit more torque on it stopped the clunk.
Win Dooley
Fort Smith, Arkansas
89 Xj6
90 VDP
93 Xj12 - drove it last night - WOW!________________________________________________________________
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Hi Bill,
When clunks like this happened to me, I found that the nut & bolt at the
bottom of the
front damper were loose. The damper seemed firm when I jacked the
car up and investigated, but I guess that it was then under tension of
the road spring and thus felt rock solid. I discovered the actual cause
when I eventually checked the tightness of all bolts. The nut was more
than a turn loose.
Mike Craig
94 XJ40 3.2S----- Original Message -----
From: “Heuerman, William C.” william_c_heuerman@md.northgrum.com
To: “‘jag-list’” xj40@jag-lovers.org
Sent: Wednesday, May 01, 2002 4:48 PM
Subject: [xj40] front end clunk
I all - I have a 93 XJ40 that when riding over certain bumps in the road
will exhibit a loud clunk that seems to emit from the right front wheel.
I
have looked at all of the suspension components and it appears that
everything is okay. any ideas?
Bill H 93 white XJ40 108kWilliam C. Heuerman
Northrop Grumman Corporation
Electronic Sensors and Systems Sector
*desk (410)765-1814 lab (410)765-8751
pager (410)541-0352 fax (410)981-2362
*email: william_c_heuerman@md.northgrum.com
John:
Where did you find your replacement upper shock bushings? I’ve check
several stores and can’t seem to locate a source for them. I noticed that
mine are old and have gotten so soft that they compress completely down to
the washers, and I would like to replace them with new.
Tom, '90 XJ40, '66 E-Type
William wrote -
CLIP << I have a 93 XJ40 that when riding over certain bumps in the road
will exhibit a loud clunk that seems to emit from the right front wheel. I
have looked at all of the suspension components and it appears that
everything is okay. any ideas?>> END CLIP
John wrote-
William - Do you have the original yellow/orange shock bushings ?? Could be
the
problem. I had similar symptoms on my '88 a month or two ago, and replaced
the
old upper shock bushings w/ the new, “soft”, black foam type, and haven’t
had
the problem since. Very inexpensive, and not very time consuming - I’ve read
about some folks having done this in 10 minutes/shock. Took me over an hour,
though._________________________________________________________________
Chat with friends online, try MSN Messenger: http://messenger.msn.com
Jag part #MMD2144AA
www.jagbits.com $30 both sides.
This is the part # for the #88 XJ40, verify it’s the same for yours…
Dennis----- Original Message -----
From: “Tom Keohan” tomkeohan@hotmail.com
To: scalonge.jf@pg.com
Cc: XJ40@jag-lovers.org
Sent: Thursday, May 02, 2002 2:24 PM
Subject: [xj40] front end clunk
John:
Where did you find your replacement upper shock bushings? I’ve check
several stores and can’t seem to locate a source for them. I noticed that
mine are old and have gotten so soft that they compress completely down to
the washers, and I would like to replace them with new.Tom, '90 XJ40, '66 E-Type
William wrote -
CLIP << I have a 93 XJ40 that when riding over certain bumps in the road
will exhibit a loud clunk that seems to emit from the right front wheel.
I
have looked at all of the suspension components and it appears that
everything is okay. any ideas?>> END CLIPJohn wrote-
William - Do you have the original yellow/orange shock bushings ?? Could
be
the
problem. I had similar symptoms on my '88 a month or two ago, and replaced
the
old upper shock bushings w/ the new, “soft”, black foam type, and haven’t
had
the problem since. Very inexpensive, and not very time consuming - I’ve
read
about some folks having done this in 10 minutes/shock. Took me over an
hour,
though.
Chat with friends online, try MSN Messenger: http://messenger.msn.com
I think part of the problem is the setup some shock
makers use for the upper bushings.
Bilstein has a cup the bushings sit in, and a spacer
between the upper and lower bushing seat that sets the bushing compression
to the correct amount.
You tighten the shock nut till it stops when the bushing
seats hit the spacer.
I think (its been a while) there are actually 6 or 7 pieces
that hold the bushings, the lower bushing seat (1), the upper
bushing seats (1), the bushings (2), the spacer between them (1)
and the nut?
I think the bushings had a thin part that fit through the hole
in the body…
I DO remember you just tighten the nut till the bushings are compressed the
correct amount and the seats hit the spacer.
I have heard other brands don’t have the spacer, and you have
to guess? how much to compress the bushings.
I have not had a problem with the bushings on my car,
the original shocks had 80,000 miles on them and the bushings
were fine, the new shocks have 55,000 miles on them and are fine.
Brett
1990 XJ6> > Where did you find your replacement upper shock bushings?
I’ve check
several stores and can’t seem to locate a source for them.
I noticed that
mine are old and have gotten so soft that they compress
completely down to
the washers, and I would like to replace them with new.Tom, '90 XJ40, '66 E-Type
William wrote -
CLIP << I have a 93 XJ40 that when riding over certain
bumps in the road
will exhibit a loud clunk that seems to emit from the right
front wheel.
I
have looked at all of the suspension components and it appears that
everything is okay. any ideas?>> END CLIPJohn wrote-
William - Do you have the original yellow/orange shock
bushings ?? Could
be
the
problem. I had similar symptoms on my '88 a month or two
ago, and replaced
the
old upper shock bushings w/ the new, “soft”, black foam
type, and haven’t
had
the problem since. Very inexpensive, and not very time
consuming - I’ve
read
about some folks having done this in 10 minutes/shock. Took
me over an
hour,
though.
In reply to a message from Brett Gazdzinski sent Mon 6 May 2002:
I had a similar clunk on my '88 xj40 that seems to emit from the
right front wheel when riding over certain bumps in the road . My
tech First replace the shock bushing thinking this was the
problem, but after replacing the bushing the clunk sound was
still there and seam to be more noticeable than before. The
problem went away after my tech replaced the sub-frame bushings
and now no more clunking sound. Now I can take those bumps in the
road head on with out coming to a almost complete stop to get
over them. cost abit high I think $500 but worth it.–
P.O Box 15706, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
In reply to a message from Heuerman, William C. sent Wed 1 May 2002:
My right front area has the same noise, which I would describe as
more like a dull ‘‘thuk thuk’’ when going over road imperfections
(bumps, holes, etc.). Too bad we can’t compare audio notes, as to
what this is a sign of.
Actually, that’s an idea. We have a place for lister pics … why
not have one to which we can download wavs of sounds from our
Jags? Could be a great help in identifying mechanical probs!
???–
&:-)) Paul '88 XJ6 VP 127K miles (black on doeskin)
Garland, Texas, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
In reply to a message from AttyDallas sent Mon 28 Oct 2002:
Sounds like the upper shock mounting bushings have gone bad. I
would recommend just replacing the front shocks entirely if they
are still original. The phome bushings they use are prone to this
problem.–
wylde8
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–