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9 - 94
ENGINE 2.4L DOHC
CYLINDER HEAD (Continued)
(15) Remove timing belt (Refer to 9 - ENGINE/
VALVE
TIMING/TIMING
SPROCKETS - REMOVAL).
(16) Remove camshaft sprockets (Refer to 9 -
ENGINE/VALVE
TIMING/TIMING
AND SPROCKETS - REMOVAL).
(17) Remove timing belt idler pulley and rear tim-
ing belt cover.
(18) Remove cylinder head cover (Refer to 9 -
ENGINE/CYLINDER
COVER(S) - REMOVAL).
(19) Remove camshafts and rocker arms (Refer to
9 - ENGINE/CYLINDER HEAD/CAMSHAFT(S) -
REMOVAL).
(20) Remove cylinder head bolts and remove cyl-
inder head from engine block.
(21) Inspect and clean cylinder head (Refer to 9 -
ENGINE - STANDARD PROCEDURE).
CLEANING
To ensure engine gasket sealing, proper surface
preparation must be performed, especially with the
use of aluminum engine components and multi-layer
steel cylinder head gaskets.
NOTE: Multi-Layer Steel (MLS) head gaskets require
a scratch free sealing surface.
Remove all gasket material from cylinder head and
block (Refer to 9 - ENGINE - STANDARD PROCE-
DURE). Be careful not to gouge or scratch the alumi-
num head sealing surface.
Clean all engine oil passages.
INSPECTION
(1)
Cylinder head must be flat within 0.1 mm
(0.004 in.) (Fig. 9).
(2) Inspect camshaft bearing journals for scoring.
(3) Remove carbon and varnish deposits from
inside of valve guides with a reliable guide cleaner.
(4) Using a small hole gauge and a micrometer,
measure valve guides in 3 places top, middle and bot-
tom (Fig. 10). (Refer to 9 - ENGINE - SPECIFICA-
TIONS) Replace guides if they are not within
specification.
(5) Check valve guide height (Fig. 11).
BELT/CHAIN
BELT/CHAIN
HEAD/CYLINDER
AND
HEAD
Fig. 9 Checking Cylinder Head Flatness
1 - FEELER GAUGE
2 - STRAIGHT EDGE
Fig. 10 Checking Wear on Valve Guide—Typical
1 - TOP
2 - MIDDLE
3 - BOTTOM
4 - CUT AWAY VIEW OF VALVE GUIDE MEASUREMENT
LOCATIONS
1 - VALVE GUIDE
2 - 13.25 - 13.75 MM (0.521 - 0.541 IN.)
3 - SPRING SEAT
Fig. 11 Valve Guide Height
JR
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