Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: Figureman52 on 09 September 2013, 18:56:52

Title: Oil in Header Tank
Post by: Figureman52 on 09 September 2013, 18:56:52

Since I changed the HBV in May the car has been suffering from a steady but small loss of coolant.

Up until now have been running on tap water pending sorting the coolant loss, tank has always been clear.

Decided today to do a pressure test, found the expansion tank full of oil/water mix.

Is this an oil cooler failure? Or could it be something else?

Title: Re: Oil in Header Tank
Post by: amba on 09 September 2013, 19:03:05

Sounds pretty convincing oil cooler failure ,sorry to say :(

Quite a straight forward job to fix although you will need to ensure you fully flush all that oil sludge from the coolant system.Good guide in the maintenance section.

Also worth changing thermostat at same time as that will probably be gunged up too.

Dont buy second hand cooler imho .Follow guid and you will be fine  :y

Title: Re: Oil in Header Tank
Post by: tunnie on 09 September 2013, 19:15:44

Classic oil cooler failure, don't drive it until it's been fixed  :y

Title: Re: Oil in Header Tank
Post by: TheBoy on 09 September 2013, 19:59:27

How long have you been runnign without fresh antifreeze?

Title: Re: Oil in Header Tank
Post by: kevinp58 on 09 September 2013, 20:21:46

Oh yes oil cooler

Title: Re: Oil in Header Tank
Post by: Figureman52 on 09 September 2013, 20:47:16

Quote from: TheBoy on 09 September 2013, 19:59:27

How long have you been runnign without fresh antifreeze?

Since May :-[

Changed HBV, forgot to buy antifreeze when I did the job. Bought it, noticed slight coolant loss, thought sort it before putting antifreeze in. Can't belive 4 months have elapsed. :o

Only covered about 1500 miles. Expansion tank totally clear  last week.

What's the best source for replacement cooler? GM genuine? If so what price am I looking at?

Title: Re: Oil in Header Tank
Post by: Figureman52 on 11 September 2013, 10:04:11

Can anyone tell me if these parts are available at trade club prices?

4 off - 11076852 - Oil pipe to cooler metal O ring
1 off - 93176626 - Oil cooler kit, includes, cooler, cooler plate, 2 nuts and 2 O ring seals
1 off - 93165267 - Grey coolant plate sealent (fits cartridge gun)
4 off - 12992647 - Coolant bridge dowty washers
Oil filter

Thanks

Title: Re: Oil in Header Tank
Post by: JamesV6CDX on 11 September 2013, 10:15:28

Vauxhall parts warehouse / vaux world do kits at good rates with genuine bits :y

Title: Re: Oil in Header Tank
Post by: Marks DTM Calib on 11 September 2013, 10:17:57

The running on tap water is what has caused your failure (antifreeze has anti corrosion additives).

Oil cooler kit can be got here:

http://www.ebay.co.uk/itm/VAUXHALL-OIL-COOLER-V6-OMEGA-SINTRA-SIGNUM-93176626-/190843297148?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item2c6f259d7c#ht_909wt_907

Other items are Vx supply, you should get some trade discount and there not to pricey

Title: Re: Oil in Header Tank
Post by: Figureman52 on 11 September 2013, 10:19:44

Thanks for the information.  :y

Title: Re: Oil in Header Tank
Post by: Field Marshal Dr. Opti on 11 September 2013, 17:54:54

Quote from: Figureman52 on 11 September 2013, 10:19:44

Thanks for the information.  :y

Console yourself with the thought that the oil cooler usually only needs replacing once in the life of an Omega. :-\

I had the same problem. All fixed now. :y

Title: Re: Oil in Header Tank
Post by: Marks DTM Calib on 11 September 2013, 20:19:49

Or if correctly serviced, never in the life time of the car  :y

Title: Re: Oil in Header Tank
Post by: kevinp58 on 11 September 2013, 20:26:00

Quote from: Fuse18 on 11 September 2013, 10:17:57

The running on tap water is what has caused your failure (antifreeze has anti corrosion additives).

Oil cooler kit can be got here:

http://www.ebay.co.uk/itm/VAUXHALL-OIL-COOLER-V6-OMEGA-SINTRA-SIGNUM-93176626-/190843297148?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item2c6f259d7c#ht_909wt_907

Other items are Vx supply, you should get some trade discount and there not to pricey

I got mine from stealers, cooler, sealer and all the o-rings and washers for £170 including the VAT.  :y :y

Title: Re: Oil in Header Tank
Post by: Figureman52 on 11 September 2013, 20:42:12

Quote from: Fuse18 on 11 September 2013, 20:19:49

Or if correctly serviced, never in the life time of the car  :y

Duly chastised.  ; :-[ ;D :y :y

Title: Re: Oil in Header Tank
Post by: Figureman52 on 19 September 2013, 11:16:01

I've checked the guide but can't see the torque value for the E12 bolts around the oil cooler plate.

Could someone tell me what it is?

Thanks

Title: Re: Oil in Header Tank
Post by: allen25 on 19 September 2013, 13:11:54

I have 20 Newton Metres in my notes (from when I did this job) for the cooler cover plate torx bolts.

Title: Re: Oil in Header Tank
Post by: albitz on 19 September 2013, 13:40:21

Iirc its 2onm for the small bolts (ie cover plate) ,and 30nm for the large ones (ie coolant bridge/oil cooler pipes to cooler).

Title: Re: Oil in Header Tank
Post by: Figureman52 on 19 September 2013, 17:04:00

Thanks.  :y :y

Title: Re: Oil in Header Tank
Post by: kevinp58 on 19 September 2013, 19:10:44

Quote from: Albitz on 19 September 2013, 13:40:21

Iirc its 2onm for the small bolts (ie cover plate) ,and 30nm for the large ones (ie coolant bridge/oil cooler pipes to cooler).

+1  :y and don't forget to rest it over night for the sealer to harden properly, so don't fill it with coolant  :y :y

Title: Re: Oil in Header Tank
Post by: Figureman52 on 19 September 2013, 21:31:37

Thanks for the reminder. Easily forgotten in trying to finish the job. :y :y :y