Remove The Semi-Circular Cap; Clean The Cylinder Head - Nanni T4.155 Workshop Manual

60300140( )
indice A
ADVICE: Lay out the combustion chambers in the logical
disassembly order.

REMOVE THE SEMI-CIRCULAR CAP

CHECKING, MAINTENANCE AND
RECONDITIONING OF COMPONENT PARTS OF
THE CYLINDER HEAD
1. CLEAN THE TOP OF THE PISTON AND THE TOP
SURFACE OF THE CYLINDER BLOCK
a. Rotate the crankshaft so as to bring each piston to top dead
center. Use a gasket scraper to carefully remove all signs of
carbon deposits accumulated on the tops of pistons.
b. Also remove any particles of sealant from the surface of the
cylinder block.
REMARK: take care not to scratch the surfaces.
c. Eliminate accumulation of carbon deposits and oil in bolt holes
with compressed air.
PRECAUTION: Protect your eyes when cleaning with a
powerful jet of compressed air on these parts.

2. CLEAN THE CYLINDER HEAD

A. Remove pieces of gasket
Use a gasket scraper to remove any signs of sealant on the cylinder
block surface.
REMARK:
Take care not to scratch the contact surfaces of the
cylinder block.
B. Clean the combustion chambers
Remove carbon deposits from combustion chambers using a metal
brush.
REMARK:
Take care not to damage the contact surface of the
cylinder block.
4 CYLINDERS WORKSHOP MANUAL 102/191