Bit of a weird one - to me anyway.
Checking the engine mounts on the R26 over the weekend, and hence under the car with an inspection light in my hand I noticed an unusual grease deposit around the drivers side drive shaft / inner CV joint.
Where the Drive shaft bearing mount is indicated in the bellow pic there is Lithium grease showing.
Definitely not oil - but silver / grey 'shimmery' lithium type grease used in CV joints.
Now the strange thing it that there isn't any damage to the CV boot - it's perfectly clean. The boot retaining strap is nice and tight and placed perfectly. The CV boot is not misplaced.
But there is grease on the side of the bearing mount - it appears that the grease is coming through the 'back / bottom' of the CV joint - through the bearing mount, and out the other side around the drive shaft.
There isn't anything in all the Megane doco I've got to indicate that there might a seal there, but a drive shaft place I contacted felt there could be a welch plug in the back of the CV joint which could be leaking.
Since it's a big enough job to just remove the drive shaft to look I thought I'd just put the question up here first....has anyone seen or heard of this potentially mysterious CV joint welch plug before ?
Any other ideas for what could be causing this mysterious grease leak ? It's not like the bottom of the car is covered in the stuff - the grease around the drive shaft is maybe 5mm thick, but it's something that can only get worse with time.