Porsche 996 TT Repair Manual page 449

Location
Cylinder head nut (coat thread and sealing
surface of the nuts with engine oil)
Camshaft housing (thread and sealing surface
of screw head are lightly oiled)
Camshaft bearing cap on camshaft housing
Oil guide housing (screws microencapsulated −
replace)
Guide rail between the camshaft wheels
Central screw for axial camshaft adjuster on the
inlet camshaft; before tightening, the adjuster
must be positioned to the left−hand stop
Sprocket wheel central screw on the exhaust
camshaft (internal serration)
Guide/tensioning rail on crankcase
Camshaft housing cover on camshaft housing,
left /right
Oil extraction pump on camshaft housing
Control valve for axial camshaft adjuster
Holder for valve lift adjustment control valve
Water pump bracket and engine carrier on
crankcase
Screw plug for exhaust turbocharger extraction
pumps
Screwed socket for exhaust turbocharger return
line
Oil drain plug on oil container − exhaust
turbocharger
Engine oil return line on neck/oil tank
996420, 996421, 996450, 996451, 996620, 996621, 996650, 996651, 996840, 996841
Cylinder, cylinder head and camshaft housing
einordnung
Thread Tightening torque Nm (ftlb.)
M10 30 Nm (22 ftlb.), then unscrew; 20 Nm (15
ftlb.) (joining torque); then retighten all
screws to 20 Nm (15 ftlb.); final tightening
M8 (10.9) 23 Nm (17 ftlb.) initial tightening
28 Nm (21 ftlb.) final tightening
M6 (10.9)
M5 (8.8)
M6 (10.9)
M12 x 30 Nm [22 ftlb.] initial tightening
1.5 x 120 170° torque angle (replace screw)
M12 x 30 Nm [22 ftlb.] initial tightening
1.5 90° torque angle (replace screw)
M6 (8.8)
M6
M27 x
1.5
M6
M10
(10.9)
M6
M16 x
1.5
M18 x
1.5
M30 x
1.5
with 120° turn
13 (9.5)
7 (5)
13 (9.5)
31 (23)
10 (7.5)
10 (7.5)
25 (19)
10 (7.5)
65 (48)
4 (3)
30 (22)
30 (22)
60 (44)
386