Sump gasket

[John Raeburn]

So no need to clean the filter ?
Only after high mileage

Tim.
The "Filter" is a fine wire mesh, which does no more than preventing the odd nut and bolt, twig, or fag end from getting into the pump! Once you have an oil tight sump leave well alone, a regular oil change is all you need.
Sumps tend to leak because they have been over tightened, which tends to distort the flange around each stud hole, make sure that it is perfectly flat before fitting.
J