MGB Register Forum

My ‘75 BGT suddenly started leaking oil through the dipstick.
I did an oil and filter change, then I also replaced the crankcase breather box with a new one. I also checked all breather pipes etc for further blockages or sludge.
The car’s not smoking at all and the oil pressure is perfect across the the rev range. There is no drop in performance and the oil remains crystal clear.
After cleaning the carbs etc and reassembling it’s still leaking via the dipstick. Does anyone know if it’s possibly the pressure relief valve ?

Have you changed the oil cap?
Should be vented type

I'm sure there will be more ideas soon.

Welcome to the forum

Paul

Thank you yes, vented cap fitted… and weeping oil!

Have you checked (removed & cleaned) the side cover? It has a kind of wire wool filter in it that can get gunked up..the wire wool corrodes too, so its a bit rubbish....