So, on the EA82 in my L wagon, there appears to be a hole slightly smaller than my pinky finger on the front of the timing belt casing to the right of the oil pump. I assume it's been there a while because it looks like there was a patch up job on another area of the cover, but im not sure what they've used there. Being that I'm a broke uni student, is there a relatively cheap and easy way of patching it up?
I would appreciate any help

Thanks,
Bret