03 23 Installing Camshaft Housing - Porsche 996 TT Repair Manual

15 03 23 Installing camshaft housing

Refer to tools and tightening torques in Chapter "Removing camshaft housing"!
1. Replace seals. Replace the seals between the chain box/camshaft housing and the cylinder
head/camshaft housing seal. The embossed recesses in the seal must face the cylinder head.
2. Place the camshaft housing in position. Carefully put the camshaft housing on in a staight line. When
doing so, make sure that the flat−based tappet guides are not damaged.
Note
If screws of strength class 8.8 have been installed, these must be replaced by screws of strength class
•
10.9.
3. Mount the 18 hexagon−head bolts. The bolts are tightened in two stages in the order specified.
• Initial tightening: 23 Nm (17 ftlb.)
• Final tightening: 28 Nm (21 ftlb.)
4. Insert flat−based tappets. Spread a thin coat of clean engine oil on the flat−base tappets. Do not
interchange the flat−base tappets. In the case of the flat−base tappets for the inlet camshaft, make sure that
the feather keys are positioned in the grooves in the flat−base tappet housing.
5.
15 03 23 Installing camshaft housing 458