Front Bush replacement on Rear Subframe

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WGB

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With a spare couple of hours tonight I hoisted the 6.9 and decided to install the front bushings in the rear subframe.

I am also going to do the semi-trailing arm bushes but not tonight.

Here are the "before" pictures showing the right front rear-subframe bush in tension and compression and showing near enough to 1 cm of movement in the joint.

Oldrearsubframebushingintension.jpg

Here is the mounting with the rear end hanging under it's own weight.

Oldrearsubframebushing.jpg

Here is the same mounting with a jack under the subframe lifting it.

The Meyle joint kit cost US$46.70 from AutohausAZ and includes upper and lower mountings both sides, new 17 mm headed replacement bolts and spring washers for the 17mm bolts and the 24 mm main bolts.

The diff has to be supported and the joints undone.

The old mounting has to be prised out - stiff but a pry bar will do the job, not necessary to use the puller described in the manual.

The diff is lowered on the jack and with a hammer handle as leverage the upper rubber "Doughnut" is removed and replaced on each side.

PressinghometheBushing.jpg

The new lower bushing is coated with rubber lubricant and I used a broom on a trolley jack to press each one home.

The large mounting bolts were very hard to start on their threads and I used a length of iron rod, the trolley jack and a 24 mm open ended spanner to get the bolt to start on it's thread.

The new joint resembles the appearance of the second photo and has no perceptible movement whatsoever.

When the rain stops I will take it for a drive and see what difference it has made before I do the semi-trailing arm bushes as I think this will make an enormous difference to the stability of the car in corners.

Bill
 

Styria

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Hi WGB, thanks for this comprehensive write-up and the pics. You can't really beat them, can you, especially when you so quietly and unobtrusively slip in your gearbox jack. I am jealous, but then again its no use buying one as I have no hoist to slip it under !

As a matter of interest, do you think it has made any differewnce handling wise ? I recall your mention of the car exhibiting strange behaviour going around right (?) hand sweepers. It'd be interesting to know. Regards Styria
 
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WGB

WGB

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Hi WGB, thanks for this comprehensive write-up and the pics. You can't really beat them, can you, especially when you so quietly and unobtrusively slip in your gearbox jack. I am jealous, but then again its no use buying one as I have no hoist to slip it under !

As a matter of interest, do you think it has made any differewnce handling wise ? I recall your mention of the car exhibiting strange behaviour going around right (?) hand sweepers. It'd be interesting to know. Regards Styria


Sometimes unfortunately you need two Gearbox jacks!!! You never can have enough.

Every time I have made an "improvement" in the bushes the handling improves and this bush replacement has made the greatest change yet.

It now tracks straight and true and there is very little difference between left and right bends particularly after this subframe mount replacement.

I am going to concentrate on my much neglected 450 for a while and finish the painting of that but will pick up on the ongoing replacement of all rubber bushes on the 6.9 as and when I have time but I have the car driving reasonably well now.

I am still interested in the RR strut balljoint when you are ready?

Bill
 

BenzBoy

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Well Bill, I have been at work on my bushes too. As you can see in the photo several layers of leather give just the right body to chassis mount - just the same as the original but not sqaushed now by 3 tonnes over a 75 year period. Simplicity has its advantages. :D Bareley visible is my new petrol tank on the lower right - handcrafted by a sheet metal worker and enamelled. :eek: Not quite clear in this picture though.
Regards,
BenzBoy
BodyMount.png
 
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WGB

WGB

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Lovely view - it's lucky you do not have all the mouths to feed that I do.

Lovely car and worth all the effort to get it as good as possible.

If it was in WA I wouldn't leave it parked for too long or the local voracious termites would be eyeing up that tasty Ash frame.:D

Mind you if I had to cut up one of my good leather belts to make body shims it starts to make the cost of M-B rubber look quite economical.

Bill
 

BenzBoy

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Lovely view - it's lucky you do not have all the mouths to feed that I do.

Lovely car and worth all the effort to get it as good as possible.

If it was in WA I wouldn't leave it parked for too long or the local voracious termites would be eyeing up that tasty Ash frame.:D

Mind you if I had to cut up one of my good leather belts to make body shims it starts to make the cost of M-B rubber look quite economical.

Bill

That's why I have sent Miss Olga out to work. :D
Termites? Never thought of that. I giess they like to travel First Class too...:eek:
Regards,
BenzBoy
 
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