Hi Guys,
Looking for a bit of advice - again. I have recently had my RS2000 gearbox rebuilt and have had a lot of trouble with oil leaks. Today I have pulled the gearbox out for the third time as it seemed to be leaking profusely from the inspection cover on top of the case. The top of the lid was covered in oil and it seems to be coming from the small vent hole.
I removed the lid and found a full gasket with a small slot cut out in the centre. This gasket doesn’t seem factory and I have attached a picture of it and also a picture of a second gearbox I have which appears to be original and only has a gasket which fits around the outside of the case only.
I would welcome any information on which of these two options is correct and maybe why my gearbox is leaking so bad. I am thinking that the gasket just around the perimeter is correct and I maybe I should install this type of gasket and also weld on a fitting over the vent hole so I can run a vent tube up higher into the engine bay.
Any comments would be appreciated.
Best regards,
Paul

Looks to me like someone failed big time when making their own gasket by not cutting out the middle!

Yeah lol had a quiet chuckle seeing that gasket.. I normally flat the mating face of the lid for a snug fit and use a sealer only like Red RTV silicone (no gasket) . Do the nuts finger tight and leave for 10min then tighten to specific settings ..

Thanks guys,
Do you think it's worth extending the breather into the engine bay with a tube or do you think I should be OK once I get rid of the dodgy gasket. I really want to make sure I don't have any leaks this time as I'm getting a bit over pulling the gearbox out, although I am getting pretty good at it with all of the practice.
Thanks again guys, much appreciated.

I've never really seen a leak coming from the breather hole, unless yours has the splash baffle broken off or something. You can braze a barb onto it if you feel it's piece of mind with some hose.. No reason why not 👍

Thanks Mate,
I think I will braze a fitting onto the lid. Seems too easy while I've got the gearbox out.
Best regards,
Paul