6-15 Chain tensioner cylinder rear – Insert the chain tensioner element 1 in the cylinder head bore. NOTE: the housing and tensioning piston of the chain tensioner are compression molded. If the two parts cannot be separated, the chain tensioner must be replaced.
1 – Apply the chain tensioner bolt and new sealing washer to the chain tensioner element without compressing the spring. – Measure the distance 2 between the sealing washer and the cylinder head.
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The measured value has to be between 6 mm and 11 mm. If the value is lower, the tensioning rail could be worn or the timing chain excessively elongated. If it is higher, the engine was turned to TDC against the running direction.
– Mount the chain tensioner bolt 3 with a new sealing washer and tighten to 20 Nm.
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