APRILIA SCARABEO 500 2008 Service Station Manual page 189

SCARABEO 500
- The head gasket is made of steel and has a
standard thickness.
- Check that the head lubrication channel is per-
fectly clean. Clean with short blasts of compressed
air, if required.
- Fit the head.
- Lubricate the screw studs and the 4 fixing stud
bolts.
- Tighten the 4 fixing stud bolts in a criss-crossed sequence to the prescribed torque as shown in the
figure.
Locking torques (N*m)
Head fixing stud bolts ***
*** First, apply a preliminary torque of 7 Nm in a
criss-crossed sequence.
- tighten by 90° in a criss-crossed sequence.
- tighten again by 90° in a criss-crossed sequence.
- Tighten the fixing nuts on the outlet side and the
intake side to the prescribed torque.
Locking torques (N*m)
Exhaust/ intake head fixing nuts 10 - 12
Engine
ENG - 189