Guide and Tensioning Rails
Removing and installing guide and tensioning railsPreliminary work
1. Remove engine.
2. Remove cover for camshaft housing.
3. Remove chain case lid.
4. Mark rolling direction of timing chain. Remove timing chain from all chain sprockets, pulling it forwards.
Information
Component overview
Replacing guide and tensioning rails
Note: If the timing chain has to be removed or replaced, check the guide and tensioning rails for wear and scoring and replace them if necessary.
Note:
^ The rolling direction of the timing chain must always be the same.
^ If the timing chain is to be reused, the rolling direction of the timing chain must be marked before it is removed.
Note: If the timing chain is to be reused, the rolling direction of the timing chain must be marked before it is removed.
1. Remove top guide rails -6- if this has not yet been done. Pull guide rail -3- and tensioning rail -1- off threaded pegs. Ensure that the spring of the tensioning rail for the oil pump drive is in the correct position in relation to the guide rail -3-.
2. Remove guide rail -3- by loosening four fastening screws (M8 x 35).
3. Remove plastic lid of oil pump drive -7-. To do this, unscrew two M5 x 20 screws -8- and remove plastic lid. Remove guide rail -9- and tensioning rail -6-.
Installing guide and tensioning rails
1. Insert guide rail -9- and tensioning rail -6-. Fit plastic lid of oil pump drive -7-. To do this, insert plastic lid and screw in two screws -8-. Tightening torque: 4.1 ft-lb.
2. Fit guide rail -3-. To do this, screw in four fastening screws (M8 x 35). Tightening torque: 24 ft-lb.
3. Attach guide rail -3- and tensioning rail -1- to threaded pegs. Position the spring of the tensioning rail for oil pump drive correctly on guide rail -3-. Fit top guide rails -6- when installing the timing chains.
Subsequent work
1. Install timing chain.
2. Install chain case lid.
3. Set the timing.
4. Install cover for camshaft housing.
5. Install engine.