Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: Peti on 12 November 2011, 17:13:21

Title: Gearbox holes
Post by: Peti on 12 November 2011, 17:13:21: Does anyone know if these holes on AR25 gearbox are

- designed like this ( breathing ?)
or
- should be covered by some rubber bung

(http://i1088.photobucket.com/albums/i324/porosz23/Gearboxholes.jpg)
Title: Re: Gearbox holes
Post by: noel on 12 November 2011, 17:16:46: when i changed my ar25 box i remember the larger hole having a rubber bung in it but not sure about the smaller one :-\
Title: Re: Gearbox holes
Post by: noel on 12 November 2011, 20:39:22: Quote from: noel on 12 November 2011, 17:16:46
when i changed my ar25 box i remember the larger hole having a rubber bung in it but not sure about the smaller one :-\
i now think the small hole did as well
Title: Re: Gearbox holes
Post by: Carfix on 13 November 2011, 16:12:52: I rememember when I bought my first Omega back in 1999 I found those two holes were not covered which did look strange.

I made a few enquiries at my local Vauxhall parts department and they confirmed that there should be two rubber grommits and in those days you could get replacements. Probably not available now? :(
Title: Re: Gearbox holes
Post by: Varche on 13 November 2011, 16:30:33: I have an AR25 on the bench. Just been out and had a look and I can't figure out where your photo actually is!

There is a large bung (4 cm) in the lower part of the bell housing.

Shall I take a picture of the under side of mine?
Title: Re: Gearbox holes
Post by: noel on 13 November 2011, 16:42:35: Quote from: Varche on 13 November 2011, 16:30:33
I have an AR25 on the bench. Just been out and had a look and I can't figure out where your photo actually is!

There is a large bung (4 cm) in the lower part of the bell housing.

Shall I take a picture of the under side of mine?

the small hole is on the bell housing of the auto box & the large hole is on the engine side that mates up with the bell housing :y
Title: Re: Gearbox holes
Post by: Peti on 13 November 2011, 20:12:22: Quote from: Carfix on 13 November 2011, 16:12:52
"...there should be two rubber grommits..."

Can you please clarify if they were

- grommits (with a hole in the centre)
http://en.wikipedia.org/wiki/Grommet

or simple

- bungs

or was it perhaps

- Gromit ?
http://en.wikipedia.org/wiki/Wallace_and_Gromit
Title: Re: Gearbox holes
Post by: noel on 13 November 2011, 20:31:17: Grommets but no holes in centre. the holes you are looking at are access points to torque converter bolts which is the larger hole. they are to keep water and road grime out IMHO :y
Title: Re: Gearbox holes
Post by: noel on 13 November 2011, 20:34:41: http://en.wikipedia.org/wiki/File:Rubbergrommets.jpg

like these but with no holes HTH :y
Title: Re: Gearbox holes
Post by: fiend61 on 13 November 2011, 21:00:17: blind grommits is the word you are looking for :y
Title: Re: Gearbox holes
Post by: Brucie1946 on 13 November 2011, 21:12:52: I have same problem

I have the round bung at the bottom of my AR35 autobox, so can confirm that for you.

I'm also missing the oval bung at the back of the bellhousoing which like people say is an inspection hole for getting to the torque converter bolts.

I'd like to find a oval bung aswell please if anyone has one?

Sorry to jump on your post.

Cheers

Dean
Title: Re: Gearbox holes
Post by: Andy H on 13 November 2011, 21:23:09: Gromit

(http://i842.photobucket.com/albums/zz341/calidoscopio/Wallace%20and%20Gromit/WallaceGromit001.jpg)

Grommet

(http://rocky.digikey.com/weblib/Keystone%20Electronics/Web%20Photos/736.jpg)

Bung

(http://www.brewstore.co.uk/ekmps/shops/shirleyeasson/images/solid-rubber-bung-to-fit-demijohn-1431-p.jpg)

HTH ;)
Title: Re: Gearbox holes
Post by: Brucie1946 on 13 November 2011, 21:29:40: last one looks like a wine demijohn bung, not sure that would help really, LOL

Basically its a oval blind grommet, someone breaking an auto omega might help??

Otherwise scrapyard, but its an arse getting underneath in a scrapyard
Title: Re: Gearbox holes
Post by: noel on 14 November 2011, 19:42:53: Quote from: fiend61 on 13 November 2011, 21:00:17
blind grommits is the word you are looking for :y
Quote from: fiend61 on 13 November 2011, 21:00:17
blind grommits is the word you are looking for :y
thanks :y
Title: Re: Gearbox holes
Post by: Andy89 on 14 November 2011, 20:59:26: There is one on the right side aswell that may be gone, atleast on a v6.

Heres a picture of my manual car.
(http://i259.photobucket.com/albums/hh301/Andygun89/DSC00166.jpg)
Title: Re: Gearbox holes
Post by: Peti on 15 November 2011, 08:44:05: Quote from: Dean MV6 on 13 November 2011, 21:12:52
"...I'd like to find a oval bung aswell please if anyone has one?..."

I think I'll just cut them out of a flat piece of rubber and simply fix them from outside using some gasket master paste, that bears heat.
Title: Re: Gearbox holes
Post by: Peti on 27 June 2012, 15:46:03: Should anyone still be interested :

(http://i1088.photobucket.com/albums/i324/porosz23/Gearboxholesblindgrommets.jpg)
Title: Re: Gearbox holes
Post by: amba on 27 June 2012, 16:15:22: The large "Oval " hole should have a bung in it...bought 1 recently from VX and was about £1=50,as mine was mising.

Its purpose is to give an access point for the auto gearbox flex plate to torque converter bolts.

The bottom round hole also has a bung in it about 25mm circular which I assume is also for getting access to the flex plate to turn it during assembly but not really sure.
Title: Re: Gearbox holes
Post by: robson on 28 June 2012, 12:04:13: I havnt looked at mine yet but it sounds as if there might be a lot of cars without these grommits.If they are there to stop water ingress they would seem to be pretty essential