Will the B12 engine timing tensioner ring

Yes, there is a bearing in the timing tensioner, and the bearing has a lifespan, and it will ring after a long time.

First, the ignition timing does not have a great impact on the car, the combustion of gasoline in the engine must be ignited by the spark plug jumping out of the spark, to make the engine start smoothly, and burn well, the spark of the spark plug must be strong enough, but more importantly, the time when the spark jumps out must be appropriate and correct, too early and too late will affect the horsepower of the engine, the time when the spark jumps out of the spark plug is the so-called ignition timing. It is generally expressed in terms of the angle of how many crankshaft turns before the piston goes to the top dead center, such as 10° before the top dead center, rather than in time.

2. Ignition timing adjustment.

1. Adjust the gap between the power-off contacts of the distributor.

The size of the contact gap not only affects the strength of the spark, but also affects the opening and closing of the contact. If the contact gap is adjusted after adjusting the ignition timing, even if it is a small change. It will destroy the ignition time that has been adjusted, so the contact gap must be adjusted before the ignition timing adjustment, and the gap must be adjusted to 0

35～0.40 mm range.

2. Find out the position of the top dead center of the compression stroke of the first cylinder, and loosen the spark plug of the first cylinder.

Slowly shake the crankshaft, when you hear a deflating sound, it means that the first cylinder is compressing the stroke. Open the sight hole cover on the flywheel housing and slowly shake the crankshaft so that the timing mark is aligned.

3. If there is an octane number selector, it should be adjusted in"0"on the scale position.

4. Determine the position where the contact of the cut-off is just opened.

Unscrew the fixing screws of the distributor housing, and turn the shell along the direction of rotation of the distributor shaft first, so that the two contacts are in a closed position. Then turn on the ignition switch and turn the shell of the distributor in the opposite direction of rotation of the distributor shaft while facing the high-voltage wire of the ignition coil against the tie iron (about 2 3 mm) until a spark is found. Finally, tighten the set screws of the distributor housing.

5. Connect the high-voltage line according to the ignition order

Replace the fire divider, insert the first cylinder high-voltage wire into the plug-in hole where the distributor cover and the conductive piece of the distributor head are aligned, and plug in the high-voltage wire of each cylinder in the order of clockwise direction.

6. Start the inspection:

Start the engine to run to a normal temperature, accelerate suddenly, and if the engine makes a short and slight knocking sound and disappears immediately, the ignition time is appropriate. If there is no knocking sound, that is, the ignition time is late, the fixing screw of the distributor shell should be loosened, and the distributor shell should be rotated a little in the opposite direction of the distributor shaft. If the detonation sound is severe, that is, the ignition time is early, the distributor shell should be turned in the opposite direction of the above until it is suitable.

Here's how:

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 with the timing mark on the chain and fix it.

3. Install the crankshaft drive sprocket, and make sure that the timing mark on the chain and the mark on the sprocket are in the same position.

Engine maintenance precautions

Clean the air filter.

The air filter is directly related to the air intake of the engine during the driving of the car, the manager of the Guangben dealership told reporters that the vehicle is only driving in the city, and the air filter will not be blocked, but if the car is driven on a dusty road, it is necessary to pay special attention to the cleaning of the air filter.

Repels throttle sludge.

There are many reasons for the formation of sludge at the throttle, some of which are the formation of carbon deposits at the throttle by the exhaust gas of fuel combustion; Then there are the impurities that are not filtered by the air filter and remain at the throttle. The increase in oil sludge will cause air resistance, which will lead to an increase in fuel consumption.

When cleaning the throttle, first of all, remove the intake pipe, expose the throttle, remove the negative pole of the battery, turn off the ignition switch, straighten the throttle flap, spray a small amount of "carburetor cleaner" into the throttle, and then use a polyester rag or high-spinning "non-woven fabric" to scrub carefully, deep in the throttle, the place out of reach can be carefully scrubbed with a clamp clamp rag, and the intake pipe and the negative electrode of the battery can be ignited after cleaning!

Clean the fuel injector and deposit carbon.

Because the combustion chamber is prone to carbon deposits, which can lead to difficulties in start-up; Carbon deposition at the fuel injector will also lead to oil channel blockage, gasoline injection deformation, poor atomization, and fuel consumption will naturally increase.

For the cleaning of the combustion chamber, a special decarbonizer can be used to soften the carbon deposits on the combustion chamber and fuel injector and detach from the surface of the parts, and then remove the softened carbon deposits. This carbon removal method has a good effect, and has the advantages of not damaging the surface of the parts compared with the previous direct wiping, and the efficiency of carbon removal has also been greatly improved.

The crankshaft and camshaft of the B12 engine are marked with timing marks, and there are corresponding marks on the cylinder block, the crankshaft marks are aligned with the timing marks on the cylinder block, and the timing marks of the camshaft are also aligned with the rigid body, and then the timing chain can be installed. If you don't understand, you can check the maintenance manual and follow the steps in the maintenance manual.

The function of the timing belt is that when the engine is running, the piston stroke (up and down movement), the opening and closing of the valve (time), the sequence of ignition (time), and the "timing"."to keep "synchronous" at all times.

The answer begins by simplifying the shape of the cam in order to describe its phase. The intake and exhaust cams are symmetrical in one of the engine's duty cycles and only twice when the piston is at the top dead center. When the timing point on the crankshaft pulley is aligned with the cylinder marking, a piston on the same axis is at the top dead center, but they differ by 180 in quadrant.

When one piston is at the beginning of the intake weather limit, the other must be at the beginning of the work quadrant; On the contrary, one is doing work, and the other must be in air intake. Taking advantage of this characteristic of the engine, the valve timing of any model can be easily determined.

In the case of in-line engines, there is only one cylinder row for this type of engine, so it is enough to determine the cam phase of one cylinder. Align the crankshaft pulley with the timing point, and then place the intake and exhaust cam of the 1 cylinder at the starting point of the work quadrant; At this point, it is not difficult to find the timing mark made by the engine manufacturer. After fine-tuning the position of the camshaft according to the factory marking, the operation is completed by attaching the timing belt or chain.

The V6 engine has two cylinders, so it is necessary to determine the phase of the camshafts on the two cylinder heads. Align the crankshaft pulley with the timing point, and then place the intake and exhaust cam of 1 cylinder at the starting point of the work quadrant; The intake and exhaust cams of the 6-cylinder (another cylinder row) are then placed at the beginning of the intake limit, and it is not difficult to spot the timing markings made by the engine manufacturer.

Question Dongfeng Fengshen A30 engine chain method, the engine model is DFMA15

There are three black marks on the chain, and the camshaft and crankshaft are dotted, so you can point the marks against the dots.

Wuling Glory is timed, the camshaft marks of the chain are 6 sections apart, and the point-to-point 15 teeth