Cheers again guys, lots of good suggestions. The real pain is it was totally leak free every where else just not where i knocked the gasket

Rick and Roger thanks
Im beginning to think that liberal use of sealant won't be necessary and that proper positioning of the sump is key.
Rick, good idea about using the studding to line up the sump up when fitting!
Is there a torque setting in any workshop manuals for the sump bolts?
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There is, i forget what it is but lots of people seem to find it excessive.
Rob,