Installing Guide And Tensioning Rails

Information 

The tightening specifications for the basic engine are stored centrally (→ 1001IN TIGHTENING TORQUES, TIGHTENING SEQUENCES, ASSEMBLY OVERVIEWS ).

Tightening Torques and assembly instructions for other assemblies (e.g. chassis, electrics, transmission or body) or for peripheral engine equipment can be found in the corresponding documents.

1. Fit deflector rail -4-  by fitting the fastening screws -5-  .
   Fig 1: Identifying Timing Chain And Sprockets

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   1. Double-Chain Camshaft Drive
   2. Camshaft Sprocket
   3. Screw, M12 Tighten Fully After Setting Timing  .
   4. Deflector Rail
   5. Screw, M8 x 35
   6. Camshaft-To-Camshaft Guide Pad
   1. Direction Of Travel
2. Fit the guide rail -3-  . The small tensioning rail is locked on the guide rail with -6-  . Slide the guide rail onto the threaded peg and move it into the correct installation position with respect to the fitted oil pump drive chain. Pull the locking pin (the tensioning rail becomes attached).
   Fig 2: Identifying Guide Rail

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. Slide the tensioning rail onto the threaded peg. -4- 
   Fig 3: Identifying Timing Chain And Chain Guide

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   1. Threaded Peg
   2. Threaded Peg
   3. Guide Rail
   4. Tensioning Rail
   5. Chain Tensioner With Sealing Ring
   6. Pin (For Locking The Oil-Pump Tensioning Rail)
   1. Direction Of Travel
4. Fit top guide rails (guide pad) between the camshafts if you have not already done so -6-  .
   Fig 4: Identifying Timing Chain And Sprockets

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   1. Double-Chain Camshaft Drive
   2. Camshaft Sprocket
   3. Screw, M12 Tighten Fully After Setting Timing  .
   4. Deflector Rail
   5. Screw, M8 x 35
   6. Camshaft-To-Camshaft Guide Pad
   1. Direction Of Travel