Aerio L4-2.3L (2006)
Tighten a little at a time and evenly among bolts and repeat tightening sequence two or three times before they are tightened to specified torque.
Tightening torque
Camshaft housing bolts (a): 11 Nm (1.1 kgf-m, 8.0 ft. lbs.)
9. Install CMP sensor.
10. Install 2nd timing chain.
11. Install timing chain cover.
12. Install cylinder head cover.
13. Install oil pan.
14. Install engine assembly to vehicle.
CAUTION:
^
Don't turn camshafts or start engine (i.e., valves should not be operated) for about half an hour after reinstalling hydraulic valve lash adjusters
and camshafts. As it takes time for valves to settle in place, operating engine within half an hour after their installation may cause interference
to occur between valves themselves or valves and piston.
^
If air is trapped in valve lash adjuster, valve may make tapping sound when engine is operated after valve lash adjuster is installed. In such a
case, run engine for about half an hour at about 2,000 to 3,000 r/min., and then air will be purged and tapping sound will cease. Should
lopping sound not cease, it is possible that valve lash adjuster is defective. Replace it if defective. If defective adjuster can't be located by
hearing among 16 of them, check as follows.
-
Stop engine and remove cylinder head cover.
-
Push adjuster downward by hand (with less than 20 kg or 44 lbs. force) when cam crest is not on adjuster to be checked and check if
clearance exists between cam and adjuster. If it does, adjuster is defective and needs replacement.
Inspection
Cam wear
Using a micrometer, measure cam height. If measured height is below its limit, replace camshaft.
Cam height
Camshaft runout
Set camshaft between two "V" blocks, and measure its runout by using a dial gauge.
If measured runout exceeds the specified limit, replace camshaft.
Runout limit 0.10 mm (0.0039 inch)
Camshaft journal wear
