| 1. Check the clearances should be only in the case of abnormal noise from the valve gear, engine renovated, or in the case of finding the causes of the fall of the power of the engine, if you suspect a problem with the timing. |
| 2. Draw the outline of a piece of paper and indicate the engine cylinders from the 1st to 4th, given that the 1st cylinder is located on the side chains drive the camshaft cover. Specify the position of each of the valves, as well as label the gap that should be maintained in accordance with the technical data. The image on the schematic valve draw two lines, which will be indicated and measured gap value which is required to adjust the gap. |
A warning  The manufacturer sets the two groups tolerances backlashes in valves. One group - to check the clearance, and the other - for adjusting and setting the clearance in the valve. Tolerances are the largest group of the check, but it is strongly recommended to keep all gaps within the adjustment tolerance band (although compliance with this condition, and is not strictly necessary).
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| 3. Warm up the engine, turn off the ignition and remove the cylinder head cover. |
| 4. Set the piston of cylinder 1 at TDC compression stroke. |
 | 5. Measure the gap between the probes cam and cam-follower in the following valves, recording each result:
- 1st cylinder - inlet and exhaust valves;
- 2nd cylinder - inlet valves;
- 3rd cylinder - exhaust valves. |
| 6. Turn the crankshaft clockwise at 360 ?�, aligning risk TDC with a pointer. In this position, the piston 4, crankshaft-cylinder is at TDC compression stroke. |
7. Measure the clearance in the following valves, recording each result:
- 2nd cylinder - exhaust valves;
- 3rd cylinder - inlet valves;
- 4th cylinder - intake and exhaust valves. |
| 8. Calculate and record the difference between the measured and regulatory clearances. If the gap in any valve differs from standard, replace the valve shim of picking up a new washer thickness. |
| 9. To remove the shim is necessary to press the plunger far enough, overcoming the force of the valve spring. For this purpose it is necessary to rotate the camshaft so that the respective valve tappet facing away from the pusher. Then turn the plunger so that the groove on it was located at a right angle to the axis of the camshaft. |
| 10. rested open-end wrench or screwdriver into a solid camshaft, and acting as a lever, push the plunger to a sufficient distance to pad could slip. By removing the gasket, slowly release the plunger. If the gasket can not be removed, the need to remove the camshaft (see. Subsection 3.1.1.10). |
| 11. The thickness of the shim is provided on the bottom surface (e.g. 224 is the thickness of 2.24 mm), but it is recommended to measure the washer micrometer, since the thickness may be reduced due to wear. |
A warning In spare parts washer with a thickness of 2.00 to 2.98 mm and a pitch of 0.02 mm.
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12. If the measured clearance less normative, then subtract the measured clearance from regulatory, and then subtract the result from the thickness of the removed washer.
Example:
The gap in the intake valve is smaller than normal
The measured clearance 0.26 mm
Regulatory gap 0.36 mm (0.32 to 0.40 mm)
The difference of 0.10 mm
Thickness 2.50 mm set goals
The required thickness of 2.50 - 0.10 = 2.40 mm |
| 13. If the measured clearance exceeds the standard, then subtract from the measured gap normative, then add the result to the thickness of the removed washer. Example:
The gap in the exhaust valve exceeds the norm
The measured clearance 0.51 mm
Regulatory clearance of 0.41 mm (0.37 to 0.45 mm)
The difference of 0.10 mm
Thickness 2.76 mm set goals
The required thickness of 2.76 + 0.10 = 2.86 mm |
14. Press the plunger, then replace the shim with a thickness chosen so that the side with the label facing down. Make sure that the washer is installed correctly, and then repeat this procedure for the other valves, gaps which differ from standard (if any). | | 15. After adjusting the gap, crank at least 4 turns in the normal direction of rotation. Recheck the valve clearances. |
| 16. If all gaps are normal, install the cylinder head cover, install the other parts removed. |
