Do you want to disassemble the engine and replace the oil seal?

Do I need to disassemble the engine to change the oil seal and piston ring?

The phenomenon of burning engine oil will lead to different degrees of "blue smoke" of exhaust gas, and the consumption of engine oil will increase obviously, so it is necessary to replenish engine oil in a short time.

Poor cylinder seal is the main reason for burning engine oil.

The poor sealing performance of the cylinder is mainly due to the excessive clearance between the piston and the cylinder wall, improper installation of the piston ring or poor sealing performance, and the engine oil on the cylinder wall enters the combustion chamber, resulting in engine oil combustion.

In addition, the poor sealing performance of the valve sealing ring, the damage of the crankcase ventilation valve or the blockage of the crankcase ventilation hole will make the pressure in the crankcase too high, so that the engine oil will enter the cylinder with the crankcase gas to participate in combustion.

If the car burns engine oil when it is cold, it is mostly the valve oil seal.

Replace the valve oil seal without folding the engine, just open the cover. Small problems are not expensive.

If a hot car burns engine oil, it is mostly a piston or piston ring.

When the oil burning is serious, it is difficult to judge whether the cylinder block or the cylinder head is burning oil. The engine must be disassembled for inspection, and the piston must be removed from the cylinder barrel. The roundness and taper of the cylinder barrel can be measured with an internal micrometer to determine the specific cause of the failure.

The cost depends on the cause of the failure, generally between 800 and 5000.

Do I need to disassemble the engine to change the oil seal and piston ring?

Hello, the cylinder head can be replaced when it is removed, but it is inconvenient in the car. If the engine is easy to disassemble, remove it and take it.

Crankshaft oil seal is leaking. You don't need to change anything else to disassemble the engine, do you?

Hello, if the front oil seal of crankshaft leaks oil, it is a bit troublesome to remove the pulley. If it is the crankshaft rear oil seal, it will take a long time to replace the gearbox and remove the clutch pressure plate, disc and flywheel disc.

Is it a big problem to replace the oil seal of automobile engine?

Common faults of automobile engine and their elimination methods

When the automobile engine is not working normally, but the self-diagnosis system has no fault code output, it is especially necessary to rely on the inspection and judgment of the operator to determine the nature and location of the fault. The author summarizes the common faults of automobile engines as follows:

1. 1 Engine failed to start.

(1) Symptoms: Turn on the ignition switch and turn it to the start position, but the engine will not start.

(2) Possible causes of failure:

A. The engine can't rotate or rotates too slowly due to the failure of the starting system: ① the battery power is insufficient, the pole clamp is loose or the pole is seriously oxidized; ② The main fuse of the circuit is blown; (3) ignition switch failure; ④ Starter failure; ⑤ The starting line is open or the line connector is in poor contact.

B. Ignition system failure: ① The ignition coil is not working well, resulting in weak or no high-voltage spark; ② Igniter failure; ③ The ignition time is incorrect.

C. Fuel injection system failure: ① There is no fuel in the fuel tank; ② The fuel pump does not work or the pump oil pressure is too low; (3) The fuel pipe leaks and deforms; (4) the circuit breaker relay is disconnected; ⑤ The fuel pressure regulator is not working properly; ⑥ The fuel filter is too dirty.

D failure of air intake system: ① failure of idle speed control valve or its control circuit; ② The air pipe of idle speed control valve is broken or the connector leaks; ③ The air flowmeter is faulty.

E.ECU failure.

(3) Methods and steps of diagnosis and elimination.

① When the starting gear is set, neither the starter nor the engine can rotate, so it should be checked according to the fault of the starting system. Firstly, check the storage of the battery and the connection and contact of the pole; If the battery is normal, check the starting circuit, fuse and ignition switch; ② Step on the accelerator to the middle open position, and then start the starter. If the engine can still be started at this time, the fault is idle control valve and its circuit fault or air leakage in the intake pipe. If you step on the gas pedal to the middle open position, the engine still can't start, so check the next step. ③ Conduct visual inspection. Check whether the air inlet pipe leaks; Check whether the hose and its joint are in good condition; Check whether the crankcase ventilation hose leaks or breaks; ④ Check the high voltage spark. If the high-voltage spark is abnormal, check the high-voltage line, ignition coil, distributor and electronic igniter; ⑤ Check whether the ignition sequence is correct; ⑥ Check the oil supply of the oil supply system. Check the fuel supply pressure in the fuel pipe when it is confirmed that the fuel tank is torn; ⑦ Check the ignition timing and ignition sequence of each cylinder; ⑧ Check the working condition of the fuel pump switch installed on the air flowmeter; Pet-name ruby check the working condition of each cylinder spark plug; Attending to check the ignition timing. If the ignition timing is incorrect, further check the ignition timing control system; ? B 1 1？ Check the power supply and working condition of ECU to determine whether it is a fault of ECU.

1.2 engine stall fault

(1) fault phenomenon: when the engine is working, the speed rises and falls, which is called engine stall phenomenon, and its fault is called engine stall fault.

(2) Cause of failure: The reasons for the high and low engine speed include fuel nozzle system failure, ignition control system failure and air intake system failure. Common reasons for failure are as follows:

① Air leakage in the air intake system. For example, leakage of hoses and connectors, leakage of PVC valves, leakage of EGR system, leakage of dipstick socket and leakage of oil filter cover. ② The air filter element is too dirty; ③ The air flow meter is not working properly; ④ The supply pressure of the fuel injection system is unstable. Such as tubing deformation, poor connection and contact of system lines, insufficient pump pressure of fuel pump, unstable operation of fuel pressure regulator, dirty fuel filter, jitter of relay contact of circuit breaker, etc. ⑤ The ignition timing is incorrect; ⑥ The cold start injector and temperature timing switch are not working properly; ⑦ECU failure.

(3) Diagnosis and elimination methods and steps: ① Check whether the air inlet pipe leaks. Check all hoses and connectors, PVC valve pipes, EGR system, dipstick socket and oil filter cover; ② Check the oil supply pressure. Check whether there is too little fuel in the fuel tank and the pressure in the fuel pipe is unstable. The specific method is the same as when checking that the engine cannot be started; ③ Check whether the air filter element is too dirty; ④ Check the ignition advance angle; ⑤ Check the working conditions of spark plugs in each cylinder; ⑥ Check the working conditions of cold start injector and temperature time control switch; ⑦ Check the output voltage of air flow meter and its relationship with engine working conditions; ⑧ Check the fuel injection quantity of the fuel injector; Pet-name ruby check the working condition of ECU.

1.......& gt& gt

Do I need to remove the engine to replace the valve oil seal?

Hello, no, just remove the cylinder head.

Can I remove the engine by replacing the front crankshaft oil seal?

You should say treadmill, right? You don't need to open it, you can change it by opening the side cover.

Is it a big problem to replace the oil seal of the engine in this place?

It is recommended to replace the crankshaft front oil seal to prevent oil leakage.

Does changing the oil seal in a new car affect the engine?

According to the difference between your car and the oil seal, Ford Focus should be careful when changing the oil seal. We should seize the opportunity, which generally does not affect.

If you are satisfied, please accept it.

I just bought a car for a year, but the oil seal was changed and it still leaked, and finally the engine assembly still leaked. What should I do?

It is still under warranty. If the engine assembly still leaks oil, repair it and continue to replace the oil seal. If the oil still leaks, the engine needs to be replaced.

hope this helps

"What do you need to remove the oil seal after replacing the engine crankshaft?"

Hello ~ I suggest replacing it in time ~ otherwise there will always be oil leakage. If there is something wrong with the car, ask the car master. 4S shop professional technician, 10 minutes to solve.