HVAC equipment HS code mapping

List of the catalog of this article:

• 1 , Is the water temperature of Weichai p12 engine 90° normal?
• 2, The Weichai p12 engine has just been repaired. What's the abnormal sound in it?
• 3, How to find the scale of the flywheel of the Weichai 430p12 engine?
• 4. What is the situation of the 1600 rpm rattling sound of Weichai p12 engine
< Li style='margin-bottom: 3px;list-style: none'>5 、Weichai p12 engine 375 horsepower powerless detection has not been faulty, please advise

Is the water temperature of Weichai p12 engine 90° normal?

This is normal. The water temperature of the general engine is about 90 degrees Celsius when it is working. Most cars are equipped with water-cooled engines, which rely on coolant to continuously circulate in the engine to dissipate heat.

The general water temperature below 95 degrees in Weichai is a normal value, so the water temperature of 90 degrees in Weichai is normal. There are many reasons for the formation of excessive water temperature in Weichai engines in summer. In addition to the relatively large problems such as cooling fan failure, water pump failure, pipeline leakage, etc., the following small parts also need to be paid attention to.

This is normal. The water temperature of an ordinary engine is about 90 degrees Celsius when it is working. Most cars are equipped with water-cooled engines, relying on the continuous circulation of coolant in the engine for heat dissipation.The coolant of the water-cooled engine has two cycle paths in the engine, one is a large cycle and the other is a small cycle.

Generally speaking, it is normal for Chaiwei's water temperature to be below 95 degrees, so it is normal for Chaiwei's water temperature to be below 90 degrees. There are many reasons for the high water temperature of Chaiwei engine in summer. In addition to these major problems, such as cooling fan failure, water pump failure and pipeline leakage, the following small problems should also be paid attention to: radiator: pay attention to the cleaning method of insect-proof nets.

The Weichai p12 engine has just been repaired. What's the abnormal sound in it?

This is generally caused by the slippage of the belt; there will also be a sharp sound of dry friction of metal parts when the engine is running, which is generally the cause of damage to the bearings of the generator, water pump and steering booster pump; if it is the sound of engine running air leakage, it may be that the exhaust system is blocked, the vacuum tube is leaking or broken. The result of cracking.

The causes of hysterical sound problems in the engine can be divided into air filters, spark plugs, ignition wires, gasoline, gasoline filters, gasifiers, oil pumps and other problems.Check whether the air filter is dirty, whether the spark plug is old and needs to be replaced, whether the ignition coil is broken, and whether the gasoline is clean, such as water in the oil line.

The existence of most common abnormal sounds in the engine depends on the speed of the engine. Abnormal sounds only exist during idle or low-speed operation.

Generally, the more serious ones are often accompanied by more serious oil burning. The valve makes an abnormal sound. After the car started, the engine made a "da-da" sound, which was the sound of the valve, especially after the cold car started, because the oil pressure had not yet increased at this time, and the valve was not lubricated in place, and it would be fine naturally after a while.

How to find the scale of the flywheel of the Weichai 430p12 engine?

On the right side of the engine.The crankshaft scale is a measuring tool that transforms the linear displacement of the active measuring head into the angular displacement of the pointer on the dial through the mechanical transmission mechanism, and the reading is indicated by the pointer on the dial.

First, look at the position of the valve, determine the position of the first and sixth cylinders, and ensure that the engine is consistent with the position of the first or sixth cylinder of the oil pump. Secondly, listen to the sound after starting, observe the smoke color of the air outlet, and judge whether the position of the first cylinder is appropriate, and then adjust it little by little.

Adjustment method of Weichai p12 valve: turn the car to the 1-cylinder compression stop point (align the OT mark and open the 6th cylinder intake valve) and adjust the 4th cylinder intake valve gap to 0.4mm.

The adjustment method of Weichai p12 valve:, turn the car to the upper stop point of 1 cylinder compression (align the OT mark, the 6th cylinder intake valve is opened), and adjust the gap of the 4th cylinder intake valve to 0.4mm.

Camshaft gear matching: First, aim the flywheel OT scale at the line on the flywheel shell from the flywheel shell observation port. At this time, the first cylinder piston should be located at the upper stop point, and the line on the camshaft gear should be aimed at the line on the gear chamber.

What is the situation of the 1600 rpm rattle of the Weichai p12 engine

If your Weichai P12 engine has a strange sound after a major repair, there may be the following Situation: The internal parts of the engine are not installed or loose. This may be caused by failure to follow the correct steps or improper installation during installation or assembly. Some parts are damaged or worn during use.

Abnormal sounds only exist during idle or low-speed operation. The reasons for the sound are: the gap between the piston and the cylinder wall is too large; the piston pin assembly is too tight or the connecting rod bearing assembly is too tight; the gap between the straight rod and its guide hole is too large; the contour of the gas distribution cam is worn; sometimes, the starting grip is loose and the pulley makes the pulley to sound (obvious when the speed changes).

The causes of hysterical sound problems in the engine can be divided into air filters, spark plugs, ignition wires, gasoline, gasoline filters, gasifiers, oil pumps and other problems. Check whether the air filter is dirty, whether the spark plug is old and needs to be replaced, whether the ignition coil is broken, and whether the gasoline is clean, such as water in the oil line.

Some buzzes may be caused purely by the resonance of specific components at high speed. For example, it was once reported that the noise made by a BMW car was caused by the resonance noise of planetary gears.This is a defect in the design of auto parts. It is the unique noise of the car system, which is difficult to change in person.

The abnormal noise of Weichai engine is caused by the speed of the engine. When the engine speed is too fast, it will cause abnormal noise, but there will be no abnormal noise when refueling. It is because the engine speed position has become smooth, and the engine deceleration will not sound, because the engine speed is reduced. .

Weichai p12 engine 375 horsepower powerless detection has not been faultless

1. After starting the engine, whether the "check the engine" warning light is off. 1 If the warning light does not go out, check the cause and part of the fault according to the fault code. 2 The warning light goes out, and check the oil pressure of the supply system, the operation of the fuel injector and the quality of gasoline.Check whether the ignition timing is too delayed. 1 The ignition is normal.

2. It is recommended that you check the circuit, ignition coil, high-voltage package, and spark plug. I suspect that the engine power is reduced due to poor ignition. Of course, there are many reasons for the decrease in power, such as filter blockage, poor oil line, serious engine wear, etc. But your fault is quite unique... So only the circuit power supply is not good.

3. There are three reasons why the speed of the diesel engine can't be increased due to weak load. I: The air filter element is blocked or the supercharger is not working normally, resulting in insufficient air rushing to the combustion chamber. The fuel sprayed into the cylinder cannot be completely burned to produce sufficient power. The load speed cannot be raised and the exhaust pipe produces black smoke, and the non-load speed is normal.

4. Mainly due to the early ignitionThe angle is incorrect, the fuel pressure is too low, the air intake system is leaking, the throttle valve position sensor or air flow meter fails, the fuel injector does not work, and the EGR system does not work.

5. The air filter is blocked. The low-pressure oil line is blocked and the flow is not smooth. The fuel injection pump is aging, the oil supply is small, and the oil supply time is late. The fuel injector has poor atomization. The cylinder is worn, and the cylinder pressure decreases. The valve is not tightly closed. ...... It is right to adjust the valve clearance every few months. Or adjust the valve clearance while maintaining it.