Q: How to remove and reinstall the valve cover for Diesel engines on 2015 Audi A3?
A: The camshaft cover removal procedure involves firstly removing the dipstick and next loosening the breather pipe off the camshaft cover, making sure that you remember where the pegs of the cover are and the position of the breather pipe as well. Then loosen the retaining bolts of the camshaft cover and remove it, take care not to loosen any of the air ducting or fuel lines (DOHC engines) of the engine, then use a soft-faced mallet to lightly tap around the edges of the camshaft cover to loosen it. Thereafter, lift the cover and check the gasket to detect any damage to it and replace it should there be any damage and make sure that the retaining bolts are fully penetrated through the gasket before it is installed back. Wipe the mating surfaces of the cylinder head and camshaft cover completely to cleanse the surfaces of any oil and old gasket material, being careful not to spoil the surfaces. To refit, follow the steps in reverse, use the appropriate sealant at the contacts on the SOHC engines, and tighten the retaining nuts or bolts to the correct torque in the correct order.