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Adjustment of valves on the engine of nineIs held with a frequency of 30 thousand kilometers. So says the service book on the car. But you can check the gaps and a little more often. The design of the gas-distributing mechanism on engines of the ninth and eighth families is such that the clearance between the camshaft of the camshaft and the valve does not increase, but decreases. In other words, you do not have to wait for the same symptoms as in the classics. Light can tap one valve, maximum two. But it will be a barely noticeable knock, which can not always be detected. It is much more effective to remove the lid and check the clearances. Only in this way it is possible to detect displaced or bursted washers, reduced gaps. After all, when the distance between the camshaft cam and the valve is changed, the whole motor is malfunctioning, causing the power to fall.

Preparation for adjustment

Before starting repair, enter into the habit of yourselfdisconnect the battery. You can accidentally hook on a power wire that is live. And the result is the melting of wires and the possibility of a fire. Install the car on the handbrake, and put the gearshift lever in neutral. Adjust the valves on a cold engine. First, it's safe. Secondly, it is required by technology. Remove the protective plastic cover, which is covered by the timing belt. It is fixed by three bolts to the brackets. Two on the back, and one on the side. After disconnect the nipples that fit the valve cover. And remove the bracket that secures the gas and suction cables (if the engine is carburetor). The valve cover is attached to the head using two nuts, which must be unscrewed with a wrench. 10. Replace the gasket under the lid with a new one. Now unscrew the candles from all the cylinders.

Adjustment of valves

Remove the oil from the top of the head usingsyringe or syringe. Now you need to combine tags. Occupation is not easy, because sometimes it happens that the timing belt slips by one or two teeth, so before adjusting the valves, check the position of the belt. On the pulley of the camshaft, there is a mark that must be aligned with the plate on the engine block. After installing the tags, open the rubber stopper that is in the clutch unit. In the viewing window you can see a plate with a triangular slit, which should coincide with the mark on the flywheel. Take a square sheet of paper with a side of 8 centimeters. It you put on the bolt, which fastens the pulley camshaft. One corner of your square is combined with the bar. Using the marker, take small risks on the pulley casing. The angle between the two adjacent ones should be 90 degrees. And then you have to scroll the crankshaft and measure the gaps. The crankshaft can be scrolled with a key for 19, and you can raise the right side on the jack and twist the wheel at the fourth speed. The gap for the intake valves should be 0.2 mm, and for the outlet 0.35 mm. To calculate the thickness of the new washer, you need to use a simple formula. The thickness of the washer is considered equal to the sum of the thickness of the old washer, measured and the nominal clearances. There is also a tolerance of 0.05 mm, so when selecting washers, take it into account necessarily. With the help of a special device for damping the valves, you loosen the washer of the washer, it is much easier to remove from the seat.

Instructions

1

Let's start with the fact that each car has two or more Valve per cylinder. One valve starts the hot mix (intake), and at that time another exhausts the exhaust gases (exhaust). Remember that on the cold engine between certain parts there are gaps, and after its heating they expand. Therefore, a knock Valve is caused by the expansion of these gaps and if it is not eliminated in time, then it could threaten a major overhaul of the engine or its complete replacement.

2

To check the valves, disassemble the motor part in theits cold state and preferably at a temperature of 20 ° C. Then take a flat probe of a certain thickness and feel the thermal gap between them. Adjust its width with a special head of the adjusting bolt and turn the adjusting screw in the desired direction.

3

Establish the piston of the cylinder in the top dead point of a step of compression. In this state, both Valve cylinders are closed, and the rocker arms of these valves must freely swing within the gap.

4

Lower the lock nut into the gap with the help ofadjusting screw or flat probe and adjust them horizontally without changing the width of the gap and then tighten the lock nut. Do not forget about the subtleties and caution, namely, after tightening the locknuts the gap may change, so all steps should be performed with utmost care. Then check the tightness itself. To do this, take the dipstick and lower it into the gap, if it passes with a little effort, it means that the gap is optimal, but if it passes easily or hard, then you need to adjust the gap more accurately.

5

After adjusting the gaps in the valve mechanism, it is necessary to start the engine and listen to its operation in various modes.

Instructions

1

To check the nozzle for any contamination,Put the rubber hose on the base of the sprayer and for greater clarity, lower the spray gun into the water. At the same time you can simultaneously check the tightness of the discharge valve, but to do this, fix the sprayer in a vertical position and create a vacuum in the hose.

2

Clogged jets clean with copperwire or blow. If necessary, separate the tubes and jets from the holder by gently rotating and pulling out of the pressed-in holes.

3

After washing and assembling the carburettorCheck the direction of the fuel jets from the spray gun. Carefully bend the tubes in such a way that the fuel is injected into the gap between the walls of the small and large diffusers in the primary and secondary chambers, without touching their surfaces.

4

If you still decided to change the jet, thenbuy a carburetor that matches the volume of your engine or close to it and use jets to replace it. Start with the fuel jet, to which then select the air jet. Set up sequentially, starting with the first camera. Each subsequent camera begins to be adjusted only after the previous setting is completed.

You will need

• - feeler gauge;
• - Allen keys;
• - Tools for adjusting screws.

Instructions

1

Before proceeding with the adjustment of the valves,read the specification of your engine. It should specify the characteristics of the gaps (usually measured in millimeters). It also provides information on how to set the top dead center of the piston. Find the marks on the flywheel, indicating at what level the piston reaches the top dead center.

2

Remove the spark plug. Remove the bolts holding the valve cover and remove it. Be careful and hold the cover, in some models, the bolts are removed very simply. In some cases, the lid and gasket underneath can become stuck in place, if this occurs, use a rubber hammer to move it. Establish the piston of the engine in the top dead point.

3

Place the dipstick in the slot between the valve stem andYoke (curved metal part at the top of the valve). If the clearance is correct, there will be little resistance to the feeler gauge. To adjust the clearance, loosen the locknut and turn the adjusting screw a quarter of a turn.

4

Continue to adjust until you get the correctGap. When you have finished adjusting, tighten the lock nut while holding the adjusting screw. Try not to tighten the lock nut too tightly. The procedure for adjusting the clearance may need to be repeated if a repeated check with the probe does not give the desired result.

5

Repeat this procedure with the remaining valvesAdmission and release. Most single- or double-cylinder engines allow you to check the condition of the valves when the engine's piston is at the top dead center, but the adjustment procedure may be different. Be sure to check the specification of your engine.

6

After completing the adjustment, install the valve cover on thea place. Make sure that the gasket and the mating surfaces are clean. Tighten the bolts crosswise, use an anti-seize compound to prevent thread failure. Clean the spark plug and replace it.