Component Markings And Distinguishing Features
WARNING: This page is about a different variant/trim than selected.
Information
Distinguishing features of the camshafts:
- The outlet camshaft has high-pressure pump cams.
- The intake camshaft has a sensor wheel on the shaft end piece.
- Cylinder bank 1: The camshaft has sliding cams on cylinders 2 and 3.
- Cylinder bank 2: The camshaft has sliding cams on cylinders 5 and 8.
Information
Allocation of bearing covers to the cylinder head cover:
- The bearing covers and cylinder head covers are marked with unique (three-digit) matching numbers.
- On the cylinder head cover, the last three digits of the clear text marking are relevant for the matching allocation.
- This matching number is used to allocate the bearing covers clearly to a specific cylinder head cover.
Marking for bearing cover/cylinder head cover 1 to 4
| 1 | Bearing cover 1 for outlet and intake side |
| 2 | Bearing cover 2 for outlet and intake side |
| 3 | Bearing cover 3 for outlet and intake side |
| 4 | Bearing cover 4 for outlet and intake side |
| 5 | Bearing cover 5 for outlet and intake side |
| 6 | Intake camshaft |
| 7 | Outlet camshaft |
Information
The procedure for removing and installing is described for one side as an example. The procedure for the other side is almost identical.
Information
When installing the bearing covers, always make sure that the parts are allocated correctly (three-digit matching number)!
Information
The axial bearing washers must be fitted ahead of the camshafts in the centre bearing in the cylinder head cover.
- Oil the bearing surfaces of the camshafts with new engine oil. When rebuilding the engine, apply Optimol Optipit grease (Part No. 000.043.204.17) on the bearing locations.
- The axial bearing washers must be fitted ahead of the camshafts in the centre bearing in the cylinder head cover.
Information
- The housings are marked E for intake camshaft and A for outlet camshaft. The housings are numbered consecutively by cylinder.
- The bearing covers are seated very securely in the cylinder head cover because of a dowel sleeve. Carefully jiggle free using a pliers if necessary. Place on a marked, clean surface.
- The bearing covers are allocated to the respective cylinder head cover by a three-digit number. On the cylinder head cover, the last three digits of the clear text marking are relevant for the matching allocation.
- Insert camshafts without tension into the cylinder head covers.
- 3.1 Fit bearing covers at the correct positions and check marking for intake and outlet camshafts and number of cylinders!
- 3.2 Fit and tighten screws according to the specified tightening sequence.
> Initial tightening 3 Nm (2 ftlb.)
> Final tightening + 30°
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Tightening sequence for camshaft bearing cover