Teach you the gap adjustment of the car valve

- Jul 09, 2019-

The valve clearance of a car is also a concern for every car owner.

Valve clearance refers to the intake valve above the engine air distribution mechanism and the gap between the exhaust valve and the valve rocker arm driven by the camshaft. The gap between the doors is too large, will make the door lift reduced, causing insufficient filling, poor row, but also will bring abnormal knocking sound. Gap is too small, will make the door work closed not strict, resulting in leakage, easy to make the door and seat of the working surface ablation.

Therefore, to carefully and carefully adjust the door clearance according to the prescribed standards to ensure the normal operation of the engine. The check and adjustment of the door clearance is carried out when the door is completely closed and the door drive mechanism is located in the base garden range of the cam. To this end, usually on the cylinder compression stop, at the same time adjust the in, row door door clearance, that is, the split head point to the cylinder of the in, row door gap.

This method is called cylinder-by-cylinder adjustment. In practice, often use the following introduction of the "in-line, advanced back row" or "double row not into" adjustment method.

In this way, you can adjust the door gap of the full department by shaking the crankshaft twice.

1) Three-cylinder machine

1 cylinder is at the upper stop of compression: When the camshaft half-garden key is in a position just above.

Adjustable: 1-cylinder 2-cylinder 3-cylinder

In line

After turning the crankshaft one turn:

Adjustable: In-row

2) Four-cylinder machine

A, 1--3--4--24--2--1--3

Double row does not enter double row does not enter

B, 1--2--4--34--3--1--2

Double row does not enter double row does not enter

3) Five-cylinder machine (since 81, West German Volkswagen introduced in-line five-cylinder engine)


Double row does not enter 4--5--3--1--2