I no longer have my Skoda, hence very short on posts in here recently. However I have found that people in here have been much nicer and more helpful than the lot in Vauxhall forums. 
 

as I’m sure this is a pretty “standard” name for the item…

 

Replacing rocker cover gasket on my diesel mk4 astra. Haynes manual says to also check “o-ring on underside of (rocker cover/cam shaft) the cover”. Google doesn’t give much away, and ideas what the real name for this part will be so I can get one? (Item 12 in photo)

Deleted, I didn't read the text fully.

Edited 13 January, 20233 yr by J.R.

4 hours ago, Wench said:

Haynes manual says to also check “o-ring on underside of (rocker cover/cam shaft) the cover”.

Illustration 12b? If so then that's either an o-ring or an o-ring.

12 minutes ago, KenONeill said:

Illustration 12b? If so then that's either an o-ring or an o-ring.

yes 12-b? I have no idea if it was called a fancy name, so I can give to the main dealer to order the part! 
 

 

5 hours ago, Wench said:

 However I have found that people in here have been much nicer and more helpful than the lot in Vauxhall forums. 

 

They must be really rough places then...

On 13/01/2023 at 11:36, Wench said:

I no longer have my Skoda, hence very short on posts in here recently. However I have found that people in here have been much nicer and more helpful than the lot in Vauxhall forums. 
 

as I’m sure this is a pretty “standard” name for the item…

 

Replacing rocker cover gasket on my diesel mk4 astra. Haynes manual says to also check “o-ring on underside of (rocker cover/cam shaft) the cover”. Google doesn’t give much away, and ideas what the real name for this part will be so I can get one? (Item 12 in photo)

Firstly, the manual says "check the o-ring and replace if necessary". It may be that the o-ring is fine, and doesn't need changing. Though for the cost of an o-ring, you might as well change it. But if you can't get a replacement, it might not be a disaster.

On 13/01/2023 at 16:13, Wench said:

yes 12-b? I have no idea if it was called a fancy name, so I can give to the main dealer to order the part! 
 

 

Secondly, it might well be that the rocker cover gasket comes as a "kit" which includes the o-ring to replace. It might be that you can buy just the rocker cover gasget as a standalone item, or you can buy it as a kit with the o-ring included. Might be worth asking your parts supplier.

 

As for the o-ring name, obviously it's sealing something, so whatever it's sealing is probably the prefix for the correct name of the o-ring.

If you're lucky, there's only one o-ring in that vicinity, and you should be able to get away with a description of "The o-ring under the rocker cover at <location> on my <year> <engine type> Astra.

 

Personally, I'd be surprised if there isn't a rocker-cover gasket kit that comes with the o-ring you need.

Good luck!