What Dai said ^^^^^
While you have the B230 out of the car, it would be worth changing the rear crank oil seal and housing gasket, front crank oil seal and camshaft seals and of course the timing belt too. Don't forget to retension the timing belt after 600 ish miles, bring the engine to TDC #1 and slacken the tensioner locknut (remove the bung in the timing cover for access) then retighten once the tensioner has taken up any slack.
Also worth doing while you have easy access are the turbo cooling pipes and the oil return pipe and seals.