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Note ♦ A second technician is needed when removing the cylinder head. ♦ The toothed belt tensioning roller is pulled off the stud bolt when prying the cylinder head out. ♦ The oil return pipe on the turbocharger is pulled out of the support when removing the cylinder head. ♦ Make sure all necessary lines are loosened. – Lift the cylinder head first on the transmission side and guide it out of the rear toothed belt guard. Be careful not to let the toothed belt tensioning roller fall. – Lay the cylinder head down so that the oil return pipe is not bent. Place a wooden block under the exhaust manifold if nec‐ essary. Installing Caution There is a risk of damaging sealing surfaces: ♦ Carefully remove the sealant residue from the cylinder head and cylinder block. ♦ Make sure that no long grooves or scratches result. Risk of damaging the cylinder block: ♦ There must be no oil or coolant in the blind holes for the cylinder head bolts in the cylinder block. Risk of the cylinder head gasket leaking: ♦ Carefully remove all lapping and sanding residue. before installing. ♦ To prevent the cylinder head gasket silicone layer and re‐ cessed area from being damaged, always handle the seal extremely carefully. Risk of damaging open valves: ♦ If a replacement cylinder head is installed, only remove the accompanying plastic base immediately before instal‐ ling to protect the open valves. Risk of damaging valves and piston heads after working on the valvetrain: ♦ To ensure valves do not strike pistons when starting, care‐ fully rotate engine at least two full revolutions. ♦ Before installing, check if the oil return pipe decoupling element is bent or stretched. If this is the case, there could be micro tears which could result in leaks. If necessary, replace the oil return pipe before installing the cylinder head. 1. Cylinder Head 111 |