Inspecting The Cylinder Head; Chain Tensioner - APRILIA SCARABEO 125 Service Manual

Engine
•
Fit a new gasket between the cylinder
and the head.
•
Place the two dowels.
•
Install the head.

Inspecting the cylinder head

•
Using a trued bar, check that the head surface is not worn or distorted.
•
Check that the camshaft bushings are not worn.
•
Check that the head cover surface, the intake manifold and the exhaust manifold are not
worn.
Inspecting the timing system components
•
Check that the guide slider and the ten-
sioner pad are not excessively worn.
•
Check that the chain assembly, the
camshaft driving pulleys and the
sprocket wheel are not worn.
•
Replace the parts if signs of wear are
found.

CHAIN TENSIONER

•
Check that the hydraulic tappet of the chain tensioner is elastic enough.
•
Should the tensioner be replaced, preload the tappet by pumping it into a container with
engine oil.
ENG - 106
SCARABEO 125 - 200