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3.1.11. Check and adjustment of gaps of valves of engines 1.6 liters


Calculation of thickness of adjusting laying of the valve

I. Inlet valve
E. Final valve
1. The measured gap
2. A difference between 1 and 3		 3. Normal gap
4. Thickness of the established adjusting laying
5. The calculated thickness of new adjusting laying

Check

PERFORMANCE ORDER
1. Check of adjustment of valves needs to be made after emergence of knock of valves, capital repairs of the engine or at reduction of engine capacity. You make check and adjustment on the cold engine.
2. Tighten the emergency brake, lift a forward part of the car and remove the right forward wheel.
3. Remove plastic protection of a wing for access to a bolt of fastening of a pulley of the crankshaft.
4. Turn for a bolt of fastening of a pulley the crankshaft before combination of openings in a pulley and the block of cylinders and block a pulley an adjusting core.
5. Uncover a head of the block of cylinders.
6. Draw the scheme of the engine and number cylinders from 1 to 4. The cylinder No. 1 is from the transmission. On each cylinder draw inlet and final the valve (see rice. Calculation of thickness of adjusting laying of the valve). Above each cylinder, in the drawing, draw two horizontal lines. On the line No. 1 write down the actual gap of all valves, and on the line No. 2 – size, it is how necessary to change a gap for obtaining the required gap size.
7. Turn the crankshaft before full closing of the inlet valve of the cylinder No. 1, i.e. the cam-shaft cam on this valve has to look up.
8. Using the probe, measure a gap between the basis of a cam and a pusher. Make record of the actual gap on the line 1, opposite to the corresponding valve.
9. Repeat measurement for the remained seven valves, turning the crankshaft as required so that the cam of the checked valve was directed up.
10. Calculate a difference between the actual and required gap and write down on the line 2.
11. If all gaps are in the required limits, establish a cover of a head of the block of cylinders, establish a plastic covering under a wing, establish a wheel and lower the car.
12. If the actual gap does not meet standard, it is necessary to make adjustment.

Adjustment

PERFORMANCE ORDER
1. Remove a cam-shaft.
2. Remove the first pusher from a head and take adjusting laying (it is specified by an arrow) from the top part of the valve. Carefully wipe adjusting laying and measure its thickness by a micrometer. Adjusting laying is usually marked, but their thickness can decrease due to wear.
3. Addressing the chart of a condition of gaps of valves (see rice. Calculation of thickness of adjusting laying of the valve), it is necessary to determine thickness of new adjusting laying. If the actual gap of the valve was more demanded, then thickness of adjusting laying has to be increased by the size which is written down on the line 2 opposite to the corresponding valve. If the actual gap of the valve was less demanded, then thickness of adjusting laying has to be reduced by the size which is written down on the line 2 opposite to the corresponding valve.
4. In the drawing draw three horizontal lines below each valve (see rice. Calculation of thickness of adjusting laying of the valve). On the line 4 write down the measured thickness of adjusting laying, then add or subtract the value which is written down on the line 2. As a result thickness of laying which needs to be established for receiving an optimum gap of the valve which needs to be written down on the line 5 turns out.
5. Thickness of adjusting laying is ranging from 2,22 to 3,550 mm with a step of 0,025 mm.
6. Repeat operation on the choice of a new adjusting plate for the remained valves.
7. At installation of new laying establish it by marking down. From above on adjusting laying establish pushers.
8. Establish a cam-shaft and repeatedly measure a gap of valves.
9. On the 1.8 and 2.0 liters engines hydraulic pushers with automatic adjustment of a gap of valves are used.