Morris Minor Owners Club

I know this can be a can of worms on here but we will see.
When I got my 948 moggie it leaked from the rocker. After two gaskets, I found that the cover itself was bent so it couldn't seal. So I bought one from a Metro for the pricey sum of £5.
Since I have put this cover on it leaks oil, but not from the rocker gasket. It doesn't drip when standing so I guess it is being forced out when in use. It has a vented filler cap but I assume this is not sufficient as when I check for mayonnaise there is plenty, and sometimes there are water droplets too. Just so you know how much it uses I had a 5 litre oil can for top ups only, it is empty in 3000 miles ish..
So I have been considering tapping the rocker cover for a breather. But then I had a brainwave. I have a redundant 1100 engine in the workshop that has the tappet chest breather system. Could I use the tappet chest breather on the 950 and replace the vented cap with a solid one? It will be routed through the carb as it has the provision (currently blocked with a section of hose and a bolt).
I haven't seen any 950's with this arrangement, but I can't think why it would be wrong if it was used for late minor engines..
TIA.

The 948 should have a breaather pipe from the tappet chest, check that it is clear, a pipe from the rocker box to air filter or preferably to the carb if you have a later carb, and a vented oil filler cap.
600 miles to 1 litre is not good but not excessive

Ah yeah, forgot about that one
It has a later carb with the provision on it, looks like I'll have to tap a hole or find another rocker cover then.
How is best to check it is clear - I was going to prod some old guitar string up there - good move?
I wouldn't mind if it was 'using' the oil but as far as I can tell it is just falling out!

You must keep the breathing as it was designed, which means replacing like with like, even the oil filler cap.

Do you get blue smoke from the exhaust at any time?
If you rev the engine a bit with the oil filler cap off what happens?

Forget the leaky oil filler cap - it releases nasty carcinogenic fumes which you then breathe - DO make sure the rocker cover breather is connected to the carb inlet pipe. And make sure the cam follower chest breather is not blocked - and if necessary extend it down slightly so it vents into the air stream below the car. Simples!

That concludes it then - I will have to put a rocker breather in.
MarkyB - always has the slightest hint of blue smoke but it has a problem with number 3 cylinder that I think contributes to that. Filler cap has the faintest of smoke on revs.
Has anyone here tapped a breather? Or know where I can get the piece to put in?

Remove trhe tappet chest cover and check that there is no gunge blocking the inside end of the breather pipe.

Just straighten out your original rocker cover.

I'll have to find it first.. Now, where did I put that