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The intake camshaft is driven by the exhaust camshaft via a timing chain. Pretensioning of the timing chain is performed by a hydraulic timing chain tensioner. Hydraulic timing chain tensioner The hydraulic timing chain tensioner is mounted between the camshaft sprockets on the upper part of the cylinder head. The hydraulic chain tensioner is supplied with the appropriate oil pressure via an oil bore. Also integrated in the hydraulic There is a service pin at the chain tensioner for releasing the pretension during servicing. Locking and disengaging the hydraulic timing chain tensioner
Description Chain tensioner locked Chain tensioner disengaged Service pin Upper chain guide Lower chain guide NOTE: After installing the upper part of the cylinder head, make sure that the hydraulic chain tensioner is in the The chain tensioner can be locked and disengaged again for servicing using the service pin. To lock the chain tensioner, lift the service pin and then turn it 90 degrees. To pretension the chain tensioner, turn the service pin once more by 90 degrees. The unlocking can be clearly felt. Cylinder block Item A B 1 2 3
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