Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: AndyManta on 01 November 2017, 07:13:38

Title: Omega A R25 Hydraulic or Cable
Post by: AndyManta on 01 November 2017, 07:13:38: Hi

I'm building an Opel Manta A with my brother. We have a C20XE motor and an R25 omega, GM 90335693 0822680, that we found.

Is this model a cable or hydraulically actuated clutch?

Any knowledge or advice on pairing this combination would also be most welcome. I heard I need to place a spacer between the clutch fork and bearing..?
Title: Re: Omega A R25 Hydraulic or Cable
Post by: biggriffin on 01 November 2017, 10:53:24: Hydraulic clutch, yes 20mm spacer available on eBay, can't find link. :y
Title: Re: Omega A R25 Hydraulic or Cable
Post by: dave-b on 01 November 2017, 22:45:03: Here you are...............
http://www.ebay.co.uk/itm/Omega-R25-R28-Gearbox-to-Opel-C20XE-C20LET-Redtop-Saab-B204-clutch-spacer-kit/272382472888?hash=item3f6b42b2b8:g:D7EAAOSw14xWKQFR
Title: Re: Omega A R25 Hydraulic or Cable
Post by: mandula on 02 November 2017, 11:08:32: ^ Does this spacer fit when converting from Z22XE double mass flywheel+clutch assembly to singe mass flywheel+clutch assembly from Vectra/Omega A?

Or is it better to make spacer between slave cylinder and release bearing?
Title: Re: Omega A R25 Hydraulic or Cable
Post by: biggriffin on 02 November 2017, 19:28:09: Quote from: mandula on 02 November 2017, 11:08:32
^ Does this spacer fit when converting from Z22XE dual mass flywheel+clutch assembly to singe mass flywheel+clutch assembly from Vectra/Omega A?

Yes
Title: Re: Omega A R25 Hydraulic or Cable
Post by: bootie on 03 November 2017, 22:34:00: I'm not entirely sure the R25 is hydraulic, thought it was the hybrid R25/28 or the R28 that were the hydraulic versions

Think the R25 was standard on the GSI 12v with the R25/28 going on the 2.6 versions and the R28 on the GSI 12v.

If the above is correct then I think the R25 is a cable operated, I might be wrong and stand to be corrected.
Title: Re: Omega A R25 Hydraulic or Cable
Post by: biggriffin on 04 November 2017, 09:45:10: All omega clutches are hydraulic, small pipe from brake reservoir feeds the slave/release bearing.
Title: Re: Omega A R25 Hydraulic or Cable
Post by: MonzaGSE on 04 November 2017, 11:34:55: He’s asking about Omega A (Carlton in uk i believe). And im pretty shure that had a clutch cable. At least on the four cylinders.
Title: Re: Omega A R25 Hydraulic or Cable
Post by: Mr Gav on 05 November 2017, 12:43:23: Quote from: MonzaGSE on 04 November 2017, 11:34:55
He’s asking about Omega A (Carlton in uk i believe). And im pretty shure that had a clutch cable. At least on the four cylinders.

The R25 was fitted to all models apart from the 3.0 24v which was fitted with the R28 according to the Haynes manual, the R28 was hydraulic so I`m assuming the R25 was cable operated from the clutch.
Title: Re: Omega A R25 Hydraulic or Cable
Post by: bootie on 17 November 2017, 23:09:30: Yep, that is correct, the R25 from the Omega A (Carlton) was cable operated.
However along with the R28 there was also the hybrid R25/28 both of these were hydraulic. The hybrid R25/28 was used on the smaller 6 pot models the 2.6 12v.