Remove
Remove cylinder head cover – see operation "Cylinder Head Cover, Remove and Install".
Remove simplex chain tensioner (2) – note installation position.
Heat fastening bolts (1) intensively with hot air blower and remove.
Caution
Use sheet metal plate or suitable heat shielding to avoid damaging the guide rails.
Remove
Remove guide rail (3) for simplex timing chain upwards – note installation position.
Clean thread for the fastening bolts (1) in cylinder head.
Install
Insert guide rail for Simplex timing chain with new fastening bolts and connect – ensure installation position is correct – tightening torque 8 Nm / 6 lbf. ft.
Insert simplex chain tensioner (4) in cylinder head – closed side of chain tensioner must face tension rail. Install closure bolt (2) with new seal ring (3) – tightening torque 60 Nm / 44 lbf. ft.
Caution
A distinction must be made between designs with a release pin (1) and without a release pin.
In the design with a release pin, the chain tensioner must be relieved of tension via the release pin after assembly!
Inspect
Press in the release pin with a hammer shaft until a click is heard.
It must be possible to push in release bolt up to stop with thumb and for it to slide back to its original position automatically – the release bolt can no longer be pushed in once the oil pressure has built up.
Install
Install cylinder head cover – see operation "Cylinder Head Cover, Remove and Install".