Note: check and adjust the clearance in the valve drive on a cold engine.
1. Disconnect the negative plug from the storage battery.
2. Disconnect the wiring harness.
3. Disconnect the accelerator cable.
4. Disconnect throttle control cable (automatic transmission).
5. Disconnect the crankcase ventilation hoses.
6. Disconnect high voltage wires.
7. Remove the cylinder head cover with gasket by unscrewing the four nuts and removing the spark plug tube seals.
Note: Arrange the spark plug tube seals in the order of removal to install them correctly to minimize the possibility of oil leakage.
8. Set the piston of cylinder No. 1 to TDC of the compression stroke.
A) Rotate the crankshaft pulley and align its mark with the alignment mark "ABOUT" on cover #1 of the timing belt.
b) Check that the valve lifters for cylinder #1 are free and the valve lifters for cylinder #4 are tight.
If not, turn the crankshaft one turn (360°) and align the mark as above.
9. Check up a backlash in a drive of valves.
A) Check the clearance in the actuator of the valves indicated in the figure.
Using a feeler gauge, measure the clearance between the tappet and camshaft.
Record the measurement results. These will be used later to determine the required shim when replacing.
Valve clearance (cold engine):
- intake - 0.19-0.29 mm
- graduation - 0.28-0.38 mm
b) Rotate the crankshaft one revolution (360°) and align the labels as above.
V) Measure the clearance in the drive of the valves indicated in the figure.
5. Adjust the valve clearance.
A) Remove the adjusting washer.
Rotate the crankshaft so that the camshaft lobe is at the top.
Position the pusher as shown in the illustration.
Using a special tool (A), press the pusher, and place the special tool (IN) between the camshaft and pushrod.
Remove special tool (A).
Remove the shim using a small screwdriver and a magnetic bar.
b) Determine the size of the new shim using the following method:
Using a micrometer, measure the thickness of the removed shim.
Calculate the thickness of the new shim so that the valve clearance is within the specified values.
- Thickness of removed shim - T
- Valve clearance measured - A
- New shim thickness - N
- inlet - N \u003d T + A (- 0.24 mm)
- graduation - N \u003d T + A (- 0.33 mm)
Select a new shim with a thickness as close as possible to the design value.
Note: shims have 17 sizes (thickness values) from 2.50 mm to 3.30 mm through 0.05 mm.
V) Install a new shim into the tappet. Using a special tool (A), press the pusher, and remove the special tool (IN).
G) Recheck the valve clearance.
6. Install the cylinder head cover.
A) Remove the old sealing material and apply sealant to the cylinder head as shown.
b) Install the gasket on the cylinder head cover.
V) Install the cylinder head cover and four spark plug tube seals by tightening the nuts.
- Tightening torque - 15 Nm
7. Connect the crankcase ventilation hoses.
8. Connect high voltage wires.
9. Connect the accelerator cable.
10. Connect throttle control cable (automatic transmission).
11. Connect the wiring harness.
12. Connect the negative plug to the storage battery.