Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: amba on 04 December 2011, 19:39:56

Title: Rear diff oil change
Post by: amba on 04 December 2011, 19:39:56
In readiness for winter I want to drop the diff cover plate and replace the rear diff oil as sure it has been therefore the entire 146k miles I have owned car.

What is the best sealant to seal up the cover plate with ?
Title: Re: Rear diff oil change
Post by: Jimbob on 04 December 2011, 20:06:19
check the maint guides, no need to remove the plate, iirc you can dril through one of the bottom bolt holes, use that as a drain, then the bolt acts as a plug.
Title: Re: Rear diff oil change
Post by: Michael2.6 on 04 December 2011, 20:22:11
Or you could use a oil extractor
Title: Re: Rear diff oil change
Post by: amba on 04 December 2011, 22:13:09
Sounds a strange method..."drilling through a bottom bolt"  :o..would that really get all the old crap out of the diff and is that not prone to some issues if the drilling went "pete tong "  :-X...Usefull if somebody has a link to this method or has first hand experience with this  :y

Oil extractor is a fair call but surely no big effort removing plate and would have thought the cost of some form of gasket from a tube !! :D ;D would be less than going out to buy an oil extractor.
Title: Re: Rear diff oil change
Post by: Andy B on 04 December 2011, 22:16:10
....
What is the best sealant to seal up the cover plate with ?

I'd expect it to be the grey
Title: Re: Rear diff oil change
Post by: Andy B on 04 December 2011, 22:16:54
.
Title: Re: Rear diff oil change
Post by: Ken T on 04 December 2011, 22:22:36
Or you could always go over to the search box, located on the RHS, and type in Diff Oil, and one of the choices will be this http://www.omegaowners.com/forum/index.php?topic=90526.msg1155368#msg1155368

Simple  :y

Ken
Title: Re: Rear diff oil change
Post by: ngrainqey on 04 December 2011, 22:56:20
lol shall i just say it? ...loctite?
Title: Re: Rear diff oil change
Post by: feeutfo on 05 December 2011, 03:44:55
lol shall i just say it? ...loctite?
But which one? Now if you'd said loctite 598, or 5910. Or a thread lock for the bolts...
Title: Re: Rear diff oil change
Post by: amba on 05 December 2011, 07:19:30
Thanks for assisitance ,guys  :y

Main reason for my question was I had read the full guide several times and am fully aware of how the job should be done,my concern was the type of sealant required.

Mark refers to the use of Loctite 598,but that doesn,t appears to be available from normal factors so what would be a  suitable alternative  ;) 
Title: Re: Rear diff oil change
Post by: tigers_gonads on 05 December 2011, 08:30:10
Halfrauds do a loctite sealent ( gray )  Sorry, can't remember the number or if you have any of the black stuff for cam covers, that will do the job  :y

Stuff drilling holes, just remove the end plate (with a bucket underneath the diff  ;D ;D )
Drain it out and refill via plug on the side of diff  :y

I used a ptfe additive and just over a litre of oil.
Also if you have a old iceing shringe about, use that because its a bitch to get the bottle in there  ;)
Title: Re: Rear diff oil change
Post by: Jimbob on 05 December 2011, 08:33:46
http://www.omegaowners.com/forum/YaBB.pl?num=1305781216/0

explains the diff bolt, ive heard of it a few times now :y
Title: Re: Rear diff oil change
Post by: tigers_gonads on 05 December 2011, 08:40:26
http://www.omegaowners.com/forum/YaBB.pl?num=1305781216/0

explains the diff bolt, ive heard of it a few times now :y


It would be handy if someone has a picky of one of these "drilled" bolts so it could be added it to the "how too"   :y
Title: Re: Rear diff oil change
Post by: Kevin Wood on 05 December 2011, 09:26:28
Thanks for assisitance ,guys  :y

Main reason for my question was I had read the full guide several times and am fully aware of how the job should be done,my concern was the type of sealant required.

Mark refers to the use of Loctite 598,but that doesn,t appears to be available from normal factors so what would be a  suitable alternative  ;)

Loctite 598 is a black RTV sealant, it memory serves, so essentially the same as the black cam cover gasket sealant.
Title: Re: Rear diff oil change
Post by: Marks DTM Calib on 05 December 2011, 09:35:55
598 is/was dark grey.

I would be looking to use the oil cooler sealant for this job as its what is used on the sump assemblies.
Title: Re: Rear diff oil change
Post by: feeutfo on 05 December 2011, 10:03:59
Thanks for assisitance ,guys  :y

Main reason for my question was I had read the full guide several times and am fully aware of how the job should be done,my concern was the type of sealant required.

Mark refers to the use of Loctite 598,but that doesn,t appears to be available from normal factors so what would be a  suitable alternative  ;) 
5910 replaced 598
Title: Re: Rear diff oil change
Post by: Mr Gav on 05 December 2011, 19:07:53
http://www.omegaowners.com/forum/YaBB.pl?num=1305781216/0

explains the diff bolt, ive heard of it a few times now :y


It would be handy if someone has a picky of one of these "drilled" bolts so it could be added it to the "how too"   :y

I did it on my Senator but sadly I don`t have any pictures. It`s easy to do though, just remove the bottom bolt from the casing and using a 5 or 6mm drill bit drill on an upwards angle from the bottom of the bolt hole at the front to the top of the bolt hole at the back and drill through the casing. Have a container to catch the diff oil as it comes out but as it`s quite thick it doesn`t come out anywhere near as fast as engine oil.
If you take it for a good long run first then the old oil will come out easier bringing out any remaining swarf with it.
A bit of ptfe tape on the bolt before you put it back in and everything will be fine.