Adjust the valve clearance in the following procedures:
- Remove the air filter/resonator assembly and the relevant
parts installed on the cylinder head cover.
- Remove the cylinder head cover hexagon bolts and remove the cover.
- Turn over the crankshaft to make No. 1 cylinder match with the
compression top dead center. When the camshaft sprocket notch (2) is aligned
with the timing belt rear cover triangle pointer (1), and the crankshaft sprocket
point (3) is aligned with the oil pump housing point (4), the compression
top dead center is on the ignition sequence for No. 1 cylinder.
- Check the valve clearance for No. 1 cylinder compression top dead
center. Refer to Cylinder Compression Check Specifications in
Engine Mechanical Specifications
.
- When the valve clearance check of No. 1 cylinder
compression top dead center is complete, position No. 1 cylinder on the exhaust,
top dead center, while rotating the crankshaft in a 360-degree arc. When the camshaft
sprocket point (2) is aligned with the timing belt rear cover triangle pointer (1),
the exhaust top dead center is on the ignition sequence for No. 1 cylinder.
- Check the valve clearance for the No. 1 cylinder exhaust top dead
center. Refer to Cylinder Compression Check Specifications in
Engine Mechanical Specifications
.
- Check and adjust the valve clearance (a) using
thickness gage.
The measured value of valve clearance should meet the
specified value. If not, adjust the valve clearance.
Important: In case of a hot engine, warm up the engine
until the electric cooling fan begins to work and stop the engine to adjust the clearance
with 20-30 minutes from there.
- When adjusting the valve clearance, loosen the adjust nut (2) and tighten
or loosen the adjust rod (1) properly. Refer to Valve Clearance Specifications
in
Engine Mechanical Specifications
.
Valve Timing Procedure
- Check the valve timing.
- After removing the high headlamp, loosen the bolts (1) and remove
the timing belt front upper cover (2).
- Turning the crankshaft clockwise twice, align the
notch (2) on the crankshaft pulley (1), marked 0 , for the timing
check on the timing belt front lower cover.
Important: Notch (2) should be aligned with pointer (1)
to set the valve timing normally.
- Check if the notch (2) on the camshaft sprocket is aligned with the triangle
pointer (1) on the timing belt rear cover.
Valve Timing Adjustment Procedure
- Adjust the valve timing.
- Loosen the bolt and remove the timing belt pulley (1). In loosening
the bolt, use the driver (2) in the picture as shown.
- Remove the oil level gage guide tube (2) and
the timing belt front lower cover (1).
- Remove the timing belt tensioner (2) and the
timing belt (1).
- Using the bolt, turn the crankshaft clockwise to align
the mark (4) on the crankshaft sprocket with the pointer (3) on the
oil pump housing. Then, turn the camshaft to align the notch (1) with the pointer (2).
Notice: Refer to Fastener Notice in the Preface section.
Important: Do not tighten the tensioner bolt completely.
- Install the timing belt (1) and the tensioner (2).
- Turn the crankshaft twice clockwise; align the mark (3) with the
pointer (4) and tighten the tensioner bolt to 15-23 N·m
(11-17 lb ft).
- Install all removed parts.