Porsche 996 TT Repair Manual page 518

9. Remove chain tensioner. To do this, unscrew the two fastening screws of the chain tensioner cover and
remove the cover. Then remove the chain tensioner.
10. Remove guide rail for timing chain. Remove the three fastening screws on the short guide rail
between the camshaft sprockets and remove the guide rail.
Note
•
11. Remove camshaft sprockets. The timing chain must not be loaded when the screw connection of the
camshaft sprockets is loosened. To remove the sprocket wheels, the actuating element of the inlet
camshaft must be countered using special tool holding wrench 9653 , and the sprocket wheel of the
exhaust camshaft must be countered using speical tool holding wrench 9653/1 .
Note
• Only remove oil guide housing from the camshaft if the camshaft has to be replaced!
The pan−head screws of the oil guide housing can fall into the crankcase when unscewing, the use of
•
a magnetic socket wrench insert is therefore recommended.
Removing the camshaft housing
einordnung
455