目录.p65

Engine mechanism - Valve clearance

Valve clearance....................................................

Adjustment......................................................

1. Remove engine plastic hood components.


2. Remove ignition coil components [4G18-3705110].


3. Remove cylinder head cover components [4G18-
   1003130].


4. Remove engine right bottom shield.


5. Turn crankshaft to cylinder 1 compression top dead

center position.

(a) Turn crankshaft pulley to align its groove with “o” mark on

timing chain hood.

(b) Check dot marks on camshaft timing sprocket and VVT

timing sprocket, and they should be in a line on timing chain

hood surface as shown in the diagram.

Hint: if not, turn crankshaft for one circle again

and align the above marks.

6. Check valve clearance.
   (a) Only check the valves shown in the diagram.
   (1) Measure the clearance between valve tappet and cam-
   shaft with plug gauge.
   (2) Record valve clearance measuring value exceeding
   specification, and this value will be used to determine
   valve tappet thickness that needs change.
   Valve clearance (cold vehicle)
   Intake air
   Exhaust

(b) Turn crankshaft for one circle ), and cylinder 4 is

turned to compression top dead center position.

(c) Only check the valves shown in the diagram. Measure valve

clearance (see step (a)).

7. Remove drive belt
   Slowly turn drive belt tensioner clockwise to loosen it.
   Then remove drive belt and put back drive belt tensioner slowly
   and gently.

30

Mark Mark

Mark Timing chain

hood surface

Groove