Toyota 4-Runner 1985 Repair Manual page 47

EM-18
ENGINE MECHANICAL - Cylinder Head
INSPECTION AND CLEANING 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. Scrape the carbon from the piston top.
(b) Remove all gasket material from the top of the block.
Blow carbon and oil from the bolt holes.
2. CLEAN COMBUSTION CHAMBER
Using a wire brush, remove all the carbon from the com-
bustion chambers.
CAUTION: Be careful not to scratch the head gasket con-
tact surface.
3. CLEAN VALVE GUIDES
4.
5.
Using a valve guide brush and solvent, clean all valve
guides.
REMOVE GASKET MATERIAL
Using a gasket scraper, remove all gasket material from
the manifold and head surfaces.
CAUTION: Do not scratch the surfaces.
CLEAN CYLINDER HEAD
Using a soft brush and solvent, clean the head.
CAUTION:
Do not clean the head in a hot tank as this will
seriously damage it.