Toyota Viachi 479QA engine timing is right

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.

Timing belt: Timing belt is an important part of the engine valve system, which ensures the accuracy of intake and exhaust time through the connection with the crankshaft and a certain transmission ratio. The belt is used instead of the gear because the belt is less noisy, has little self-variation and is easy to compensate.

Obviously, the dust or life of a belt is definitely shorter than that of a metal gear, so it is important to replace the belt regularly.

There are markings on the upper gears, alignment, and the timing can be hung up.

You've never had a Toyota 4a, but those two are pretty much the same.

It's very simple, there are markers, and if you don't understand, you can find me.

1. According to the mark on the crankshaft timing pulley, the crankshaft is generally required to have the position of the upper dead center of the piston of the 1 cylinder;

2. The mark on the camshaft timing pulley is aligned with the camshaft, and the double camshaft is aligned with the position of the two camshafts;

3. Install the timing belt chain.

Only the camshaft gear of the engine timing gear is marked, and the rest of the gears are not marked. First, turn the engine so that the cylinder reaches the top dead center. Then assemble other gears except camshaft gears, and see that there is a mark on the machine body, so that the mark of the camshaft gear coincides with this mark.

After that, turn the engine to make it about 22 degrees before the top dead center, adjust the fuel injection pump to make it in a state of just out of the oil in a cylinder, and tighten the screws.

Not so much trouble, all marked.

An engine is a machine that can convert other forms of energy into mechanical energy, such as internal combustion engines (gasoline engines, etc.), external combustion engines (Stirling engines, steam engines, etc.), electric motors, etc. For example, the internal combustion engine usually converts chemical energy into mechanical energy. An engine applies to both a power generation unit and an entire machine including a power unit (e.g

gasoline engines, aero engines). The engine was first born in the United Kingdom, so the concept of engine also comes from English, and its original meaning refers to that"A mechanism that generates power"。

The body is the skeleton that constitutes the engine, is the installation foundation of the engine's various mechanisms and systems, and all the main parts and accessories of the engine are installed inside and outside to bear various loads. Therefore, the body must have sufficient strength and rigidity. The body group is mainly composed of parts such as cylinder block, cylinder liner, cylinder head and cylinder gasket.

The cylinder block and upper crankcase of a water-cooled engine are often cast as a whole, which is called the cylinder block - the crankcase, which can also be called the cylinder block. The cylinder block is generally made of gray cast iron, the cylindrical cavity in the upper part of the cylinder block is called the cylinder, the lower half is the crankcase supporting the crankshaft, and the inner cavity is the space for the crankshaft to move. There are many stiffeners, cooling water jackets and lubricating oil channels cast inside the cylinder block.

Place the cylinder piston in the top dead center compression position.

a) Turn the crankshaft pulley and align its notch.

The timing mark "O" of the timing belt cover

b) Check the "K" mark of the camshaft timing pulley.

Aligned with the timing mark of the bearing cover. If there is no alignment, turn the crankshaft 360

Align the dot under the k point on the camshaft pulley with the mark on the cylinder head, and align the mark on the crankshaft with the mark on the oil pump casing.

The engine is an inline-four, water-cooled, 16-valve engine. The cylinder diameter is mm, the engine displacement is small, and the camshaft timing pulley is mounted and tightened with a tightening torque of 6 on·m.

It is the engine model produced by Lifan, the technology of changing the engine is Toyota 8A, a classic technical engine, with a power of 78kW and a torque of 137N·m, the advantage of this engine is low fuel consumption, durable, and the design concept is low speed and high torque.

First of all, the crankshaft position sensor should be removed, the crankshaft should be rotated, so that the 3-cylinder piston reaches the top dead center and then return to 90, and then fix the position of the two camshafts with special tools. Then rotate the crankshaft to make 3 cylinders in the top dead center position, and lock the crankshaft with a special tool in the place where the crankshaft position sensor is installed, so that it can not rotate. Install the timing belt and adjust the belt tension, tighten the fastening screws of the camshaft gear according to the torque requirements of the maintenance manual, and take down the special tools for fixing the crankshaft and camshaft.

At least rotate the crankshaft for more than two weeks, fix the position of the crankshaft and camshaft with special tools again, and check whether its position has changed and whether the belt tensioning meets the requirements. After confirming that there is no problem, take down the special tool to fix.

Hello, the timing system of the 479Q is well assembled!

Align the dot under the k point on the camshaft pulley with the mark on the cylinder head, and align the mark on the crankshaft with the mark on the oil pump casing.

Hope it helps! Have a nice ride! [Car questions, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Requires special tools for alignment. on the cylinder block. That is, the lower part of the front of the cylinder block.

There is a hole. A dedicated screw is required to go in. Up to the crankshaft can not turn.

The rear end of the camshaft also has alignment. Special tools are also required. The openings of the timing marks on the two camshafts are to be kept horizontal.

On camshaft pulleys. There are markers. It's easy to spot.

The pulley at the bottom of the timing part also has a timing point.

This typing is more troublesome, you can check it on the **more detailed.