What to press down with the Audi A6 timing tensioner

Vice, or golden top! After pressing back into place, the positioning pin can be pinned on.

The personal outfit can only find something, don't go down.

Rotate the engine crankshaft so that the piston of one cylinder is located at the top dead center position; Align the camshaft gear timing mark with the timing mark on the chain; Install the crankshaft drive sprocket to ensure that the timing mark on the chain and the mark on the sprocket are in the same position; Make sure that the three timing marks on the timing chain and the two positive signs on the camshaft sprocket do the time mark, and a timing mark on the crankshaft sprocket correspond one by one.

The main function of the engine timing chain is to drive the valve mechanism of the engine, so that the engine intake and exhaust valves can be opened or closed at the appropriate time, so as to ensure that the engine cylinder can be inhaled and exhausted normally. In some models, such as Volkswagen Jetta (EFI), Santana 2000, Bora, Audi, etc., the timing belt also shoulders the task of driving the water pump.

The work of timing chains is to rely on high-strength metal chains to connect the sprockets of parts such as crankshafts and camshafts and keep them running in sync. Because of the high speed of operation between metals, the wear is fast, and the temperature is high, so it is necessary to design a lubrication system that is compatible with each other for cooling and lubrication.

Photo by Li Shuiqing of Pacific Automobile Network).

The timing gear of the engine, the front end of the crankshaft and the flywheel are marked with the alignment mark, which means the position of the dead center of the piston of the first cylinder of the engine.

When disassembling the engine timing mechanism, be sure to double-check that the timing mechanism is officially marked. If not, be sure to mark a simple mark, otherwise if the timing is disrupted, and there is no timing mark, it will be very troublesome to find a cylinder top dead center position.

The general steps of timing calibration: 1. Rotate the engine crankshaft so that the piston of one cylinder is located at the top dead center position and fixed; 2. Align the timing mark of the camshaft gear (as shown in the upper part of the figure, the two red gears, generally small pits or arrows) to the timing mark on the chain (the link of the timing number is different from the color of other links), and fix; 3. Install the crankshaft drive sprocket (as shown in the lower part of the figure), and make sure that the timing mark on the chain and the mark on the sprocket are in the same position. 4. Finally, it is necessary to ensure that the three timing marks on the timing chain correspond to the two timing marks on the camshaft sprocket and one timing mark on the crankshaft sprocket.

There are a lot of engines are not pointed, manually engrave or draw a point, gear and cylinder block one by one, gear to find a comfortable position to get the point, the corresponding cylinder block below also get one, 2 occlusal gears each bite each other to make a point. When loading, a pair of a few points, not afraid of making mistakes. I'm really afraid that if I don't get it right, I will take a picture with my mobile phone after the drawing, and I won't be wrong.