TIMING CHAIN
ENGINE OVERHAUL
11B-30
5. Turn the inlet V.V.T. sprocket housing in the right
and left directions. Check it smoothly moves in the
range of A (approximately
12.5
°<4B11>,approximately 20°<4B12>)
NOTE: The stopper pin is locked in the most
retarded angle position.
6. .After the check, remove the inlet V.V.T. sprocket
from the inlet camshaft
7. Completely remove the tape sealing the inlet
camshaft ports for the advanced angle and for the
retarded angle.
VALVE CLEARANCE ADJUSTMENT
Measure valve clearance in the following procedure.
Check and adjust the valve clearance with the timing
chain installed.
CAUTION
Always rotate the crankshaft clockwise.
AK901129
AC
Timing mark
1. Rotate the crankshaft clockwise to align the timing
mark of the inlet V.V.T. sprocket and the exhaust
camshaft sprocket with the top surface of the
cylinder head as illustrated. (Set the No. 1 piston
at top dead centre on the compression stroke.)
10
11
12
7
8
8
3
4
4
3
1
2
2
1
5
6
6
5
9
AK502387
AM
Inlet valve side
No.1 No.2
No.3
Exhaust valve side
No.1
2. Valve clearance can be measured at the
illustrated location in this condition.
AK502758
3. Use a thickness gauge to measure clearance
between the camshaft and valve tappet.
Standard value (cold engine)
Inlet side: 0.20 ± 0.03 mm
Exhaust side: 0.30 ± 0.03 mm
4. If measured values are out of the standard value,
record measured values.
AK502545
AF
Timing mark
5. Rotate the crankshaft by one turn clockwise to set
the No. 4 piston at top dead centre on the
compression stroke.
NOTE: The timing mark of the exhaust camshaft
sprocket must be at the illustrated position.
10
11
12
7
8
8
3
4
4
3
1
2
2
1
5
6
6
5
9
AK502388
AJ
Inlet valve side
No.3 No.4
Exhaust valve side
No.2 No.4
6. Valve clearance can be measured at the
illustrated location in this condition.
7. If measured values are out of the standard value,
record measured values.
8. If the measured value is out of the standard value,
replace the valve tappet.
To Next Page
Loading...
Need help?
General
