Sump studs size and thread

[Charles P]

 Coupled with a silicone sump gasket, leaks from the sump area are a now thing of the past and the sump is easily removable (although why you'd want to is a subject for another thread ) and re-fitted.

Steve

I do the same Steve, but my one suggested modification is that with an alloy sump it’s best to shave 1/8th off both front flange corners. If you don’t then removing the sump with the engine in the car may become difficult, as I found when I needed to do this in the Wiscombe paddock between first and second practice 

Charles