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[iansoutham]

Does anybody else have problems with the estate rear shock mounting plates?

Mine have split through for the second time in 3 years now. All genuine parts, driving fine and then a sudden bang and the drivers side rear shock absorber finds the plate cover in the boot area.

Both times on the same side. Left hand side shows no signs of movement or damage.

Has anybody had a good solution? Admittedly I do live in SE London and the whole area is speed bump city which does not help.

[Doctor Gollum]

Top mounts haven't been fitted correctly 

[iansoutham]

Does anybody have a diagram of the correct way as they are the same way they were when initially removed.

[Doctor Gollum]

Outside body:
Shock, Dished Washer, Large Rubber Bush with plastic support washer.

Inside body:
Smaller Rubber Bush with chamfered core, Dished Washer, Nut.

The two dished washers clamp onto a metal support bush as the nut is tightened. This bush slots around the shock rod and locates the two rubber bushes on the rod shaft.

Without it, the rubber bushes don't seat securely, allowing the movement which causes the top of the shock rod to contact the cover plate

A quid bets ten that this metal bush is missing

[ffcgary1]

Drivers side rear shocker on my tourer broke through a couple of years ago, seems to be a common although not a frequent problem, seem to be just the mounting bushes give up as far as i can assertain
Gary

[Nick W]

Outside body:
Shock, Dished Washer, Large Rubber Bush with plastic support washer.

Inside body:
Smaller Rubber Bush with chamfered core, Dished Washer, Nut.

The two dished washers clamp onto a metal support bush as the nut is tightened. This bush slots around the shock rod and locates the two rubber bushes on the rod shaft.

Without it, the rubber bushes don't seat securely, allowing the movement which causes the top of the shock rod to contact the cover plate

A quid bets ten that this metal bush is missing

The usual problem with this sort of part is that it is rusted to the shock top, and isn't obviously  removable. The sleeve gets thrown away along with the old shock, and the replacement bushes don't last long. This is not just an Omega problem.

[iansoutham]

Okay, I will take the £1 please.

It is assembled exactly as described above, including the bush insert.

The shock base has punched through the metal plate in the shock boot and through the lower metal plate. This has hen pushed the whole assembly through to the cover plate in the boot itself. Nut still tight on the top.

The only thing I could see was that the insert only goes through the lower bush (same height).

For now, I have taken a spare piece of metal (steel core plug) and drilled a hole in that, using it as a reinforcing plate under the shock boot, meaning that he forces are distributed over the whole plate, not just the small bit where the shock touches the washer if that makes any sense?

[Doctor Gollum]

What fittings?

[YZ250]

I remember saving this for some reason.    Sure it was from when I changed mine.

[annihilator]

I'm currently doing this very job and here is what came off and what I received with the new shocker (original in pic)



so after reading this post and checking the condition of the original fixings decided to re-use them.
John.

[Doctor Gollum]

Sound decision, none of the replacement parts are upto scratch imho...

[iansoutham]

None of the bits on the right are what you need as they are all cheap quality.

I have just found out from my guys at Vauxhall that the plate under the bush has been modified to the same as the top one.

In your picture, the 2x plates are different, the same as mine. They have been changed by Vx since to all being the top plate as it is twice the thickness due to this problem apparently.

If you can give me until this evening, I can explain better.

[annihilator]

yes thats what my parts list says

   90343956   436946   CUP,SHOCK ABSORBER TO UNDERBODY (NLS.- USE 90447244 4 36 959)    
   90447244   436959   CUP,SHOCK ABSORBER TO UNDERBODY                                                  
John.

[Diamond Black Geezer]

I can second the above, and show you a pic of that 'tube' which was on my back suspension - don't fit it, whatever you do! Better to fit an original 25-year old GM one than a brand-spanking one of them, seriously.

The don't seem bad, but they do compress heavily, and the GM ones (again, even well-used 2nd hand ones) are worth refitting. They can all be bought brand new, from Vx Stealers, though.

[Doctor Gollum]

Estate parts all need to be purchased separately now...

Saloon kit is identical EXCEPT for the lower rubber and the metal bush (items 5 and 6 on the diagram). Saloon ones are about 50% longer.