If the drive is noisy, and the engine began to pull poorly due to incomplete filling of the cylinder with the working mixture, then it is necessary to adjust the valves. Timely work carried out in this direction will avoid gas leakage, causing a loss of engine thrust, and keep the valves from overheating and burning out.
Necessary
- - magnet
- - screwdriver
- - micrometer
Instructions
Step 1
Carefully remove the cylinder head cover. Crank the engine until the piston of the first cylinder reaches the top dead center position. Make sure the mark on the pulley aligns with the pin located on the oil pump pulley.
Step 2
Pay attention to the valve lifters: those belonging to the first cylinder should have a little play, and the fourth cylinder should sit tightly. If not, turn the engine one more revolution.
Step 3
Insert the dipsticks between the cam surface and the tappet and check the valve clearances of the piston of the first cylinder. The exhaust and intake valve clearances are different on different engines. Check the indicators according to the table of measurements and adjustments.
Step 4
After cranking the engine one revolution, measure the valve clearances of the fourth cylinder at top dead center. You can determine that the adjustment is correct by inserting the end of the stylus. Under light pressure, it should bend and go inside.
Step 5
When adjusting the clearances, replace the adjusting washers on the upper side of the pushers. To do this, turn the crankshaft until the corresponding cam is installed upside down and, using a special tool, press the pusher inward. Then use a magnet or small screwdriver to pull out the adjusting washer.
Step 6
Before pressing the pusher, turn it until the notch on the top side faces the candles. Pay attention to the fact that both pushers must be pressed by the foot of the fixture.
Step 7
Measure the removed washer with a micrometer and record the result. Calculate the thickness of the new washer to ensure proper valve clearance. For the inlet valve, subtract 0.25 mm from the result obtained during the valve clearance measurement and add the thickness of the removed washer. Subtract 0.30 mm instead of 0.25 to determine the thickness of the new exhaust valve washer.
Step 8
Select the washer closest in thickness to the required clearance. To install it, press the pusher inward again. Measure the valve clearance and adjust it in the remaining valves.
