Timing Chain Tensioner: Service and Repair

Timing chain tensioner
To remove
1. Detach the turbocharger inlet hose from the filter casing. Remove the cover and filter from the filter casing.





2. Detach the hoses from the inlet hose. Remove the inlet hose.
3. Remove the chain tensioner. Use 83 96 129 Oil filter tool, B207, and camshaft drive chain tensioner.





4. Remove the lock ring from the chain tensioner and remove the piston.





To fit
1. Turn the tightening pin clockwise using a screwdriver until it engages in the tensioned position.





2. Insert the pin in the cavity of the chain tensioner with a new O-ring and fit a new lock ring. Ensure that the lock ring sits correctly in the groove.





3. Refit the chain tensioner with a new gasket.
Tightening torque 75 Nm (55 ft. lbs.).





4. Remove the camshaft cover.
5. Release/activate the chain tensioner by carefully pressing on the transmission chain or chain control. Use a screwdriver. Check that the tensioner releases.





6. Fit camshaft cover.