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[moggy]

Hi all,can anyone tell me the right size rear caliper for an omega 1995 3.l.To cut a long story short,i have ordered 2 now and my mechanic.Says they don't fit they are ATE but he says,the gap were the pads go in.On my car is 51mm but the ones i have got are only 45mm.Hope this makes scene,any advice welcome.Dean.

[05omegav6]

Where did you buy them from? Very early cars did have some technical differences, not sure rear brakes was on that list though

They should be the same, but I wonder, given the issues with fitting kits, perhaps there's some confusion between applications

[moggy]

Hi Al,this is the story.About 18 months ago just before i moved to hartlepool,my local mechanic fitted.New disks solid and new pads gm from andyc.But when he came to fitting the rear pads passenger side,he said he could not get the pads in.As the pistons would not go back far enough. So he left the old pads in,last week i had a new exhaust fitted here in hartlepool.While i was there i asked the mechanic to take a look at the rear brakes.He said the caliper was furberd and to have it refurbished or buy new,i decided on new.He took my VIN and ordered one from his local suppler,but when it arrived.He could not get the gm pads in,he says the gap on my caliper is 51mm.But the one delivered is 45mm,so he ordered another from a caliper suppler he knows well.But that one is wrong as well,ok i could just have my caliper refurbished.But what worry's me is that the disc and pads fit ok on the drivers rear,but not on the pass rear.Could it be a different caliper on the pass side,if so is that safe. .Dean.

[TheBoy]

Are we talking front or rear?

Accept the fact that most of the generic lookup systems that the motor factors use are wrong, so don't just buy stuff based on reg.

All Omega front discs/pads are the same, except pre 1998 2.0l ones, which were smaller.

All Omega rear pads are the same, but post 2001 V6 had vented rear discs (thus different calipers).

[moggy]

Are we talking front or rear?

Accept the fact that most of the generic lookup systems that the motor factors use are wrong, so don't just buy stuff based on reg.

All Omega front discs/pads are the same, except pre 1998 2.0l ones, which were smaller.

All Omega rear pads are the same, but post 2001 V6 had vented rear discs (thus different calipers).

Hi TB rear mate,when i got the car i am sure the rear were solid.So do i need to buy a vented disc caliper,even tho the discs are solid.Dean

[05omegav6]

Rears TB. They should be a matched pair ideally... Easily measured with the wheels off

Absolutely not re vented calipers unless you also fit vented discs...

[TheBoy]

Are we talking front or rear?

Accept the fact that most of the generic lookup systems that the motor factors use are wrong, so don't just buy stuff based on reg.

All Omega front discs/pads are the same, except pre 1998 2.0l ones, which were smaller.

All Omega rear pads are the same, but post 2001 V6 had vented rear discs (thus different calipers).

Hi TB rear mate,when i got the car i am sure the rear were solid.So do i need to buy a vented disc caliper,even tho the discs are solid.Dean

No, never fit vented calipers to cars with solid discs.

**ALL** omega rear pads are identical. Period.

If your man cannot fit them, they are either the wrong pad, or he is incompetent.

[05omegav6]

As above but there appear to be 3 caliper sizes based on the issues with fitting kits...

[moggy]

As above but there appear to be 3 caliper sizes based on the issues with fitting kits...

Al what do you mean,3 caliper sizes.Also what are the issues with fitting kits.Thanks Dean.

[05omegav6]

Omegas have one of two rear calipers fitted to match the discs... Vented or non vented. Pads are all the same but the fitting kits match the calipers.

Recently s couple of people have tried to order aftermarket kits from various places and have been sent two different size kits, neither of which is the correct kit for vented rear brakes.

This suggests that if there are three different fitting kits, then there must be three different calipers, of which only two are used on the Omega.

On this basis, as expensive as it might be the only two options are to either have your original calipers refurbished or obtain new from Vauxhal,  with the fittings also from Vauxhall and the pads from ananywhere...

[TheBoy]

As above but there appear to be 3 caliper sizes based on the issues with fitting kits...

For rears, GM provide 2 only. Vented and non vented.

Given the amount of confusion and completely incorrect information in the aftermarket/pattern sector, and that TC rear pads are about a tenner (+VAT), I'm at a complete loss why anybody would ever go non GM on braking components. Granted callipers are dear, but we have a good supply here on OOF

(For those not going down the Monaro/Merc brakes route)

[moggy]

Hi all,think i will start with refurbishing my calipers.If he still cant get the gm pads in then i am at a loss,as to what the problem is.How much do you think new vauxhall calipers and fixing kit would be.Dean. Also i think i will put a wanted add on here .

[Simon270172]

Hi, just been reading this and thought I'd offer my findings though I'm not sure if it helps at all.

In my time I've owned and worked on several Senators and Carltons as well as this Omega and they all had the same rear calipers with solid discs fitted though no doubt GM gave them different part numbers.
A work mate asked me to look at his('98 omega) brakes as they were squealing, they just need a clean and free up. The rattle springs and pins were past their best though so I offered to fit some good second hand ones I had in the garage, only I couldn't because they were too short.
Now, these pins came off of my Omega when I replaced the pads and I wanted shiny new ones in there cos I'm silly like that. I had to return the first lot of new pins however because they were too long, and when the replacements arrived the packaging said for vx carlton '89 onwards.
All this leads me to believe that GM fitted whatever was in the parts bin at the time which in turn leads to the situation above.
There are two different calipers for solid discs and one for vented discs even though officially only two were fitted and at some point in the past your car has had one replaced.
One last thought, are carlton/senator pads thinner?
Either way, I hope you get it sorted.

Simon.

[05omegav6]

Hi, just been reading this and thought I'd offer my findings though I'm not sure if it helps at all.

In my time I've owned and worked on several Senators and Carltons as well as this Omega and they all had the same rear calipers with solid discs fitted though no doubt GM gave them different part numbers.
A work mate asked me to look at his('98 omega) brakes as they were squealing, they just need a clean and free up. The rattle springs and pins were past their best though so I offered to fit some good second hand ones I had in the garage, only I couldn't because they were too short.
Now, these pins came off of my Omega when I replaced the pads and I wanted shiny new ones in there cos I'm silly like that. I had to return the first lot of new pins however because they were too long, and when the replacements arrived the packaging said for vx carlton '89 onwards.
All this leads me to believe that GM fitted whatever was in the parts bin at the time which in turn leads to the situation above.
There are two different calipers for solid discs and one for vented discs even though officially only two were fitted and at some point in the past your car has had one replaced.
One last thought, are carlton/senator pads thinner?
Either way, I hope you get it sorted.

Simon.

Carlton/Senator/Omega rear pads all the same

[Simon270172]

That's what I thought/expected.

Simon.