Toyota 2VZ-FE Manual page 41

ENGINE MECHANICAL – Cylinder Heads
INSPECTION, CLEANING AND REPAIR
OF CYLINDER HEAD COMPONENTS
1. CLEAN TOP OF PISTONS AND TOP OF BLOCK
(a) Turn the crankshaft and bring each piston to top dead
center (TDC). Using a gasket scraper, remove all the
carbon from the piston top surfaces.
(b) Using a gasket scraper, remove all the gasket material
from the top surfaces of the cylinder block.
(c) Using compressed air, blow carbon and oil from the bolt
holes.
CAUTION: Protect your eyes when using high–pressure
compressed air.
2. REMOVE GASKET MATERIAL
Using a gasket scraper, remove all the gasket material from
the cylinder block contact surface.
NOTICE: Be careful not to scratch the surfaces.
3. CLEAN COMBUSTION CHAMBERS
Using a wire brush, remove all the carbon from the combus-
tion chambers.
NOTICE: Be careful not to scratch the cylinder block con-
tact surface.
4. CLEAN VALVE GUIDE BUSHINGS
Using a valve guide bushing brush and solvent, clean all the
guide bushings.
5. CLEAN CYLINDER HEADS
Using a soft brush and solvent, thoroughly clean the cylinder
heads.
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