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Knackered Rear Shocks

baldilocks
Snr Member
Posts: 258
Joined: Tue Jun 24, 2014 9:44 am
Location: Invercargill, New Zealand

Knackered Rear Shocks

Postby baldilocks » Fri Jan 12, 2018 10:51 pm

I was sorting the rear shocks on daughters jag, Jerry a 3.2. I went for a ride in the back which is unusual and there was a constant knocking, when asked apparently been there "for ever"..
No surprise knackered bush on the shock passenger side. To fix I took shocks of our spare car and built 1 good set out of the 2 with best composite set of bushes. However I found this on one shock, fortunately on the scrapper but those shocks had originally been on hers and were swapped a couple of years ago.
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Looks like it has moved, the shaft of the shock has eaten through the bush and the top housing. Didnt know they could do that. So glad it was no longer on daughters car.
A Monroe shock which I notice do not get a good rep on here. Needless to say will not be using that again, its now relegated to keeping spare car movable.
93 4.0 Sovereign, James, 687486, 94MY
93 3.2 XJ6, Jerry, 94MY
93 3.2 XJ6, parts supply, 94MY

naki_k
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Posts: 27023
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Location: Kirton, nr Boston, Lincolnshire

Re: Knackered Rear Shocks

Postby naki_k » Tue Feb 06, 2018 11:32 am

I have seen this issue quite often, even on OE rear shocks. So I don’t think it’s specific to Monroe/ aftermarket parts.
Essentially, the central rod is not being kept in the Centre by the bushes, so moves around. Over the space of the cars lifetime will produce this wear.
I think there should be a top hat type bush in the middle, there. I bought some PU versions to try out to see if they can hold the position better. But I haven’t tested them yet.
SNG Barratt have them last time I looked.
90 Range Rover Vogue SE 3.9 V8 LPG
2000 LR Discovery ES TD5 A
93 3.2s - 4.0 Manual conv
91 3.2 XJ6 SportPack Manual
91 4.0 XJ6 Manual
92 4.0 XJR Manual
92 4.0 XJR
94 4.0 XJR
93 4.0 Sovereign
93 6.0 XJ81 DD6
93 6.0 XJ81 XJ12
97 4.0 X300 Sport Manual
96 4.0 X306 XJR
96 4.0 X300 D6
88 3.6 XJ6 PDH/CEM
Breaking 40/ 300

Donkeychote
Posts: 146
Joined: Fri Jun 20, 2014 1:17 pm

Re: Knackered Rear Shocks

Postby Donkeychote » Tue Feb 06, 2018 6:14 pm

The same happened on my car. Don't use that top plate again, because if it's the same as on mine, it will eat through new bushes really quickly. I was stupid enough to try, and had to re-do them in a year.
1988 3.6 Sovereign Talisman Silver Metallic

pimgmx
Distinguished Mbr
Posts: 2882
Joined: Tue Jul 08, 2014 12:07 pm
Location: Haarlem area, Netherlands

Re: Knackered Rear Shocks

Postby pimgmx » Tue Feb 06, 2018 6:52 pm

Just adding more pictorial evidence: these came from my Sovereign...

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the daily: 01 S8 D2 http://bit.ly/2kIwP4m
the eyecatcher: 93 HFM 4.0 Insignia http://bit.ly/1iGrmsU
the GT: 89 JFJ XJS http://bit.ly/1WQGpC5
the problem child: 95 HFB X306 http://bit.ly/1cW11DN
the pocket rocket: 97 2.8 E36/7 http://bit.ly/12IfE7B
the ex-daily: MY94 BRG 3.2 http://bit.ly/14GTNrq

abercanadian
Snr Member
Posts: 998
Joined: Tue Oct 16, 2012 6:50 am
Location: Vancouver Island

Re: Knackered Rear Shocks

Postby abercanadian » Tue Feb 06, 2018 7:23 pm

When I changed mine (they weren't as far gone as the above BTW :) ) I ended up using the X300 style upper bush arrangement. The shocks came with the necessary parts which do away with the "top hat" bush, replace the steel collar with a thicker one, use a pair of much larger isolators and a pair of "deep-dish" washers with a more pronounced flat near the centre. A couple of years and 10,000 kilometers later, no issues.
This "improved" system would work on any earlier year shock, but of course you would have to source the newer bits individually as they only come with the later shocks for cars with X300 style cast wishbones.

The ones I took off had the disintegrated top hat bushes and at first I thought I'd ordered the wrong shocks because of the different upper layout but when I fitted them the isolation system made sense even though the top hat bush was "missing".

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cheers

Larry
Image
94 XJ40 VDP vin 701729
Oyster Metallic/Doeskin on Aero Alloys
220,000 Kilometers/136,700 Miles
Daily Driver

94 XJ40 SOVEREIGN vin 703632
Diamond Blue Metallic/Barley
111,000 Kilometers/69,000 Miles
Parts Car


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