Installing Timing-Case Cover: Notes

Information 

If cold or excessively low-tempered components are sealed to each other by applying sealant, leaks can occur because of condensed water forming or components distorting. Components must be uniformly at least → Temperature: 17°C.

Information 

• Acetone can be used to clean the sealing faces. Ventilate this for 5 minutes before applying more sealant  .

1. Clean dirt and grease off the sealing faces of the engine and timing-case cover.
2. Fit the new metal seals on the timing-case cover. Fill the openings in the metal seals with sealant. Apply sealant at the specified markings on the engine. Applying sealant (fill openings in metal seal with sealant). Apply the sealant in such a way that no excess sealant can expand into the engine when the timing-case cover is fitted (blocked oil ducts).
   Fig 1: Exploded View Of Timing-Case And Cover Seal

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   1. Timing-case cover
   2. Timing-case cover seal, outer right (fill openings with sealant, see  6)
   3. Timing-case cover seal, inner
   4. Timing-case cover seal, rib
   5. Timing-case cover seal, outer left (fill openings with sealant, see 6)
   6. Applying sealant to timing chain housing; Loctite 5900 (000.043.204.35 status 04/07)
   1. Direction of travel
      Fig 2: Applying Sealant On Timing Chain

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. When fitting the timing-case cover, press the tensioning rail away from the sprocket (cylinder 1) towards the timing chain using a screwdriver (second worker required).
4. Fit timing-case cover straight on without letting it slip out of place.
5. Screw down all fastening screws by hand. At this stage, the screw heads should not be all the way down.

   Information 

   • The timing-case cover must be aligned using a dial gauge or steel gauge. 
   • The timing-case cover must not project over the lower part of the crankcase. Even the slightest projection must be corrected. 
   • It must not be less than  (-dimension A-  ) 1/10 mm  (-dimension A < 1/10 mm-  ).
6. Press the timing-case cover upwards slightly and tighten the fastening screws (approx. 1 - 2 Nm (0.5 - 1.5 ft lbs.) so that the timing-case cover is slightly jammed. Then align the timing-case cover.