01.8 Removal and installation of cylinder head 352/352 A 14 Carefully withdraw push rods. Note: To avoid withdrawing the tappets from their guides. the tappets must previously be loosened by a short, sharp up and down movement of the pushrods. 15 Undo all the cylinder head nuts or cylinder head bolts in the reverse order to the tightening chart. 16 Remove studs. Note: The studs and cylinder head nuts fitted pre· viously were replaced as from engine end No. 678 155 by cylinder head bolts which can be exchanged in reverse. 17 Using special tool No. 18, lift up cylinder head and remove gasket. Important! Deposit cylinder head so that no damage is done to injection nozzles. 4.1/4