Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: bluebuss on 03 June 2014, 11:35:09

Title: rear/rear subframe mounts...not donut type
Post by: bluebuss on 03 June 2014, 11:35:09
 :-\
has anyone had any dealings with the rear/rear mounts on the subframe....
the pair close to the rear diff mounts....
finding new ones is a bit of a quest....
mine are all torn, including the front mounts (found and ordered)
the rear ones however..... any advice from the masses??

thanks in advance.... :)

http://www.partsbase.org/opel/omega-b-1994-2003-13-7-1-rear-axle-crossmember/#p-ope-402943

no 8 on the link above...
Title: Re: rear/rear subframe mounts...not donut type
Post by: 05omegav6 on 03 June 2014, 12:06:15
No longer available. I stripped all the rubber off mine and filled the void with a poly compound... takes some careful preparation to ensure that the central block is correctly positioned, but one of three options...

1. Do nothing.
2. Replace with good secondhand. (Good luck finding them)
3. Repair.

Use the search on here to see my posts about my repair :y I can't remember whether it was a separate thread or buried in the "What have you done to your car today..." one :-[

Was late November iirc :-\
Title: Re: rear/rear subframe mounts...not donut type
Post by: bluebuss on 03 June 2014, 12:13:32
thank you,
 i take it these blocks dont ware out very often hence the lack of replacements.
one shop in the eastern europe area wanted 61€ a piece.. cant find the bloody address again.... >:(
Title: Re: rear/rear subframe mounts...not donut type
Post by: chrisgixer on 03 June 2014, 12:35:21
Never let anyone jack on the dif on an omega. It will rip the rear mounts rubber apart.

Higher mileage ones become un bonded due to salt/general erosion of the aluminium. From what i've seen of these they will normally last 150k assuming no jacking if course.

No longer available from vx as Al says. So if your ever in a scrappy grab what you can. They are the same on all models.
Title: Re: rear/rear subframe mounts...not donut type
Post by: biggriffin on 03 June 2014, 19:52:15
Has anybody tried or approached power flex with the dimensions of said bush,or do pedders do an equivalent for say the early Holdens with a harrop diff., with a veiw to a group buy,as they are now an NLS item :)
Title: Re: rear/rear subframe mounts...not donut type
Post by: chrisgixer on 03 June 2014, 21:40:57
Powerflex took measurements of the rear subframe front donut bushes before we did the group buy from Pedders.

Long before actually. The sales team decisded there where more lucrative...

Yes we did, no they didn't. Not likely too either.

Holden dif's are different with a direct mounting point. But it's not a mounting that is related to the dif.

It's the rear of the subframe, to the body floor. There are seperate cylindrical bushes that hold the dif to the subframe, these never fail, luckily.

So its a rear subframe mount to floor. Rather than a bush, as such. Although it is rubber bonded like most bushes.
Title: Re: rear/rear subframe mounts...not donut type
Post by: chrisgixer on 03 June 2014, 22:32:59
These buggers. The ones that are undone to change the rear springs.

(http://i344.photobucket.com/albums/p326/chrisgixer/282C1D29-2D1C-4952-82FB-397B61A3601A_zpsus6mbhlw.jpg)
Title: Re: rear/rear subframe mounts...not donut type
Post by: 05omegav6 on 03 June 2014, 22:52:49
Harrop diff cover mounts use two bolts for each mount and the dimensions are different, sadly...
Title: Re: rear/rear subframe mounts...not donut type
Post by: 05omegav6 on 03 June 2014, 22:55:28
Too add, non Harrop monaros have a single centre mount ws the diff is bolted straight to the subframe unbushed. Again two vertical bolts at the rear mounting rather than one central bolt and two bushes :y

Not for the want of looking :y
Title: Re: rear/rear subframe mounts...not donut type
Post by: chrisgixer on 03 June 2014, 23:49:37
Nearest I've found so far is.... Second pic down

http://www.benzworld.org/forums/w126-s-se-sec-sel-sd/1268836-rear-subframe-mounts.html

But again, no idea on scale/size in those pics. Plus looks like 4 bolt holes to the floor, but might be able to drill for a single bolt either side.  :(
Title: Re: rear/rear subframe mounts...not donut type
Post by: 05omegav6 on 04 June 2014, 00:01:41
It's as much about the spacing where it bolts to the floor pan. In fact the subframe bolt position gives scope to raising/lowering the rear ride height...
Title: Re: rear/rear subframe mounts...not donut type
Post by: chrisgixer on 04 June 2014, 23:31:46
Nearest I've found so far is.... Second pic down

http://www.benzworld.org/forums/w126-s-se-sec-sel-sd/1268836-rear-subframe-mounts.html

But again, no idea on scale/size in those pics. Plus looks like 4 bolt holes to the floor, but might be able to drill for a single bolt either side.  :(

Further googling shows its a single rear dif mount on the Mercs, where as the omega has two, so is roughly double the size and probably price of what we're looking for. :(
Title: Re: rear/rear subframe mounts...not donut type
Post by: davieboy0312 on 05 June 2014, 10:18:17
When i was doing my bros wheel bearing he got a old Daewoo matiz gear box mounts look identical. Never measured them though >:(
Title: Re: rear/rear subframe mounts...not donut type
Post by: chrisgixer on 05 June 2014, 12:23:38
When searching Google images one or two results suggest that might be worth looking into.

But don't tell Esta, we'll never hear the last of it. ;D
Title: Re: rear/rear subframe mounts...not donut type
Post by: Mr Gav on 05 June 2014, 19:03:16
Nearest I've found so far is.... Second pic down

http://www.benzworld.org/forums/w126-s-se-sec-sel-sd/1268836-rear-subframe-mounts.html

But again, no idea on scale/size in those pics. Plus looks like 4 bolt holes to the floor, but might be able to drill for a single bolt either side.  :(

Those look like a good replacement for Carlton/Senator diff mounts as they`ve been nls for a while now
Title: Re: rear/rear subframe mounts...not donut type
Post by: Mr Gav on 05 June 2014, 19:07:33
This looks like it might fit if a little lightweight
CLICKY (http://www.ebay.com/itm/Engine-Mount-Mounting-Opel-Kadett-Vauxhall-Astra-Nova-FEM3020-/160968498728?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item257a785e28)
Title: Re: rear/rear subframe mounts...not donut type
Post by: Mr Gav on 05 June 2014, 19:12:11
OR THIS (http://www.ebay.com/itm/Engine-Transmission-Gearbox-Mounting-Mount-Right-Opel-Vauxhall-FEM3363-/310586050686?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item48505f087e)
Title: Re: rear/rear subframe mounts...not donut type
Post by: chrisgixer on 05 June 2014, 19:19:34
:y
Title: Re: rear/rear subframe mounts...not donut type
Post by: Mr Gav on 05 June 2014, 22:17:02
I`m gonna have a chat with one of the guys at autovaux and see if they have the later one in stock, If so I`ll take one of mine off and take it in for comparison and see where we go from there.
Title: Re: rear/rear subframe mounts...not donut type
Post by: sjc on 26 November 2014, 15:09:44
Any update on this?  I'm also in need of these due to wear and tear (15 years / 180k)

Thanks
Title: Re: rear/rear subframe mounts...not donut type
Post by: Diamond Black Geezer on 26 November 2014, 15:23:22
I'd like to know too. Had NO idea about these wearing and nls.... also had NO idea you're not supposed to jack them on the diff!! Can't remember if I have - perhaps just had an axle stand under there once or twice, but then again she's on 170k + so probably pretty stuffed through age, anyway.

I'm off to the scrappy!!!
Title: Re: rear/rear subframe mounts...not donut type
Post by: chrisgixer on 26 November 2014, 19:26:27
Might be a case of mixing up some poly and moulding your own. As Al did.

Poly goop available on ebay. Apparently.
Title: Re: rear/rear subframe mounts...not donut type
Post by: 05omegav6 on 26 November 2014, 19:31:59
Might be a case of mixing up some poly and moulding your own. As Al did.

Poly goop available on ebay. Apparently.
Will try and rustle up a linky thing... :y
Title: Re: rear/rear subframe mounts...not donut type
Post by: Mr Gav on 26 November 2014, 20:49:55
I never followed up any alternatives as the Omega mounts are rebated to give a secure mount and none of the others have this and you would be solely relying on the bolt itself to resist any upward or downward forces.
One thing I`ve thought about though, you could swap out the whole rear subframe for a Senator/Carlton 24v subframe including the diff, This would need the single central mount to be fixed accurately to the chassis rail but wouldn`t be too much of a problem. Upside is nearly all 24v`s had LSD fitted, downside is standard diff mount is also NLS so you would ned to hope the one on page 1 would actually be a viable replacement.
Title: Re: rear/rear subframe mounts...not donut type
Post by: 05omegav6 on 26 November 2014, 21:38:29
Might be a case of mixing up some poly and moulding your own. As Al did.

Poly goop available on ebay. Apparently.
Here do...

http://www.ebay.co.uk/itm/Fast-Cast-Polyurethane-Liquid-Plastic-Casting-Resin-Kit-1kg-960-ml-/281490331471?pt=UK_Crafts_DrawingSupplies_EH&var=&hash=item418a21974f :y
Title: Re: rear/rear subframe mounts...not donut type
Post by: chrisgixer on 27 November 2014, 08:52:33
It's as much about the spacing where it bolts to the floor pan. In fact the subframe bolt position gives scope to raising/lowering the rear ride height...

Nah. Ride height is set by the spring length, or rather via the spacing between the body and the trailing arm. Spring and pads.

The subframe can be dragging on the floor relatively speaking, via uj's in the drive shaft the subframe position can be where it wants, although the trailing arm pivot position will move. Which would need checking I guess.

Title: Re: rear/rear subframe mounts...not donut type
Post by: chrisgixer on 27 November 2014, 08:54:09
If anyone is removing these from a car at the scrappies, make sure the diff or rear subframe doesn't fall on you during removal.

It will be pre loaded by the springs as well.
Title: Re: rear/rear subframe mounts...not donut type
Post by: Diamond Black Geezer on 27 November 2014, 10:17:07
If anyone is removing these from a car at the scrappies, make sure the diff or rear subframe doesn't fall on you during removal.

It will be pre loaded by the springs as well.

Oooh - good point! Thanks for the warning!
Title: Re: rear/rear subframe mounts...not donut type
Post by: 05omegav6 on 27 November 2014, 11:02:55
It's as much about the spacing where it bolts to the floor pan. In fact the subframe bolt position gives scope to raising/lowering the rear ride height...

Nah. Ride height is set by the spring length, or rather via the spacing between the body and the trailing arm. Spring and pads.

The subframe can be dragging on the floor relatively speaking, via uj's in the drive shaft the subframe position can be where it wants, although the trailing arm pivot position will move. Which would need checking I guess.
I see what you mean, but moving the rear of the subframe relative to the floor might allow some compensation for rear camber on lowered cars :-\
Title: Re: rear/rear subframe mounts...not donut type
Post by: chrisgixer on 27 November 2014, 12:28:55
It's taken me all this time just to work out the ride height thing. You can imagine how how long the camber thing is going to take ;D
Title: Re: rear/rear subframe mounts...not donut type
Post by: 05omegav6 on 27 November 2014, 17:49:55
It's taken me all this time just to work out the ride height thing. You can imagine how how long the camber thing is going to take ;D
Should I get the Lego out again... ::)
Title: Re: rear/rear subframe mounts...not donut type
Post by: chrisgixer on 27 November 2014, 22:10:50
It's taken me all this time just to work out the ride height thing. You can imagine how how long the camber thing is going to take ;D
Should I get the Lego out again... ::)

In public? No! :)