How do you bleed the hydraulic lifters for a Opel Corsa 1.4 2003 model?

To bleed the hydraulic lifters on a 2003 Opel Corsa 1.4, first, remove the valve cover to access the lifters. Submerge the lifters in engine oil and manually compress them to expel air, repeating this until no bubbles are visible. Reinstall the lifters, then reassemble the valve cover. Finally, start the engine and let it idle to ensure proper operation, checking for any unusual noises.