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List of contents of this article:

• 1, Who knows the process of engine overhaul?
• 2, What is the process of overhauling the engine?
• 3
  、 Engine overhaul process?
• 4, What is the disassembly and installation process of the overhaul engine?

Who knows the process of engine overhaul?

Put the side of the engine with the valve up. Check whether there are marks on the clutch cover and flywheel. If there is no mark, add the mark and then remove the clutch fixing bolt symmetrically. Remove the clutch assembly.

Confirm the problem/symptom disassembly/disassembly cleaning/check assembly/installation overhaul steps I. Confirm the problem/symptom to determine the purpose of the overhaul: what kind of failure occurs and which assembly needs to be overhauled. Then, analyze the reason for the failure and decide whether to carry out a major repair. Two.

Engine overhaul projects generally mainly include overhaul of the engine, external processing of cylinder head plane, boring cylinder, clearing water tank, grinding valve, inlaying cylinder liner, pressure piston, cleaning oil circuit, maintenance motor, maintenance generator, etc.

First, remove the accessory components of the engine, and then fix the engine with a hanger. Remove the transmission and the fixing bolts of the engine, as well as the chicken claw pad of the car chassis, etc., and remove the engine overhaul. Northern Auto Repair School.

Common accessories or processing links replaced during the overhaul process include: boring cylinder, air exchange valve, valve duct, valve oil seal, sleeve cylinder, piston, grinding shaft, crankshaft tile, connecting rod tile, tension wheel, timing belt, etc.

Remove the timing gear cover and gasket to disassemble the camshaft. Remove the protective cover on the timing gear belt. Loose camshaft timing gear belt wheel... Remove the valve group. When the valve is completely closed, remove the valve spring and valve. (1) Remove the valve chamber edge cover and gasket, and check the valve... Remove the cylinder head and cylinder pad.

What is the process of overhauling the engine?

Inspection of spark plugs and cylinder line: As one of the key components in the engine, spark plugs are also a common cause of engine failures. When checking, pay attention to whether the gap of the spark plug meets the original technical standards, and whether the resistance value of the cylinder line also meets the technical requirements. If not, it needs to be carried out Adjust or replace.

Remove the clutch tie rod, separation fork and transmission shaft, and remove the engine support rod and the front and rear support frame nuts. Tie the engine with a rope. Lift or hang down with a sling. Disintegration of the engine 1 Remove the inlet, exhaust pipe and cylinder head outlet pipe.

It is equivalent to simulating the assembly process of the manufacturer. Common accessories or processing links replaced during the overhaul process include: boring cylinder, valve exchange valve, valve duct, valve oil seal, cylinder sleeve, piston, grinding shaft, crankshaft tile, connecting rod tile, tensioning wheel, timing belt, etc.

First, remove the accessory components of the engine, and then fix the engine with a hanger. Remove the transmission and the fixing bolts of the engine, as well as the chicken claw pad of the car chassis, etc., and remove the engine overhaul. Northern Auto Repair School.

Remove the valve chamber cover and remove the locking nut of the rocker arm shaft support. Take out the rocker arm shaft one by one. Remove all the putts. And make a good order to maintain the original friction during installation. Remove the timing gear cover and gasket. Disassembly of the camshaft. Remove the protective cover on the timing gear belt.

Engine overhaul process?

1. Remove the cylinder head and cylinder pad. When disassembling, it should be disassembled evenly from both ends to the middle. Note that it is strictly forbidden to pry the cylinder head with a starter to prevent damage to the cylinder head and cushion. 4 Put the side of the engine with the valve up.

2. Professional overhaul can basically restore the engine to the best state of normal, so don't worry; after the engine overhaul, it takes more than 3 hours for cold grinding, that is, the motor drags the engine to rotate slowly; then the hot run-in of more than 2 hours is idle. Of course, ordinary auto repair shops do not have such a function, so they can only be idle for two or three hours.

3. The overhaul of automobile engines mainly includes the replacement of valves, pistons, cylinder liners, or boring cylinders, grinding shafts, etc. According to the standard of general 4S stores, 4 accessories need to be replaced, that is, piston, piston ring, valve, valve oil seal, valve duct, crankshaft tile, connecting rod tile, timing belt, tensioner wheel.

What is the disassembly and installation process of the overhaul engine?

Place the engine upright, remove the intake and exhaust manifolds and cylinder head outlet pipes. Remove the cylinder head cover, remove the rocker arm shaft assembly on the front and rear cylinder head; remove the crankshaft ventilation pipe, and remove the boom chamber cover; remove the putter.

I, when the engine is removed from the frame, it must be carried out under full cooling conditions. Otherwise, it will cause deformation of some parts. The principle of disassembly is from the auxiliary part to the main part from the outside to the inside.

Engine disassembly steps and methods: Step 1: Remove the intake and exhaust pipes and exhaust pipes of the cylinder head. Step 2: Remove the valve cover. Remove the locking nut of the rocker arm shaft bracket and take out the rocker arm and shaft together. Remove all the putts. And make a good order so that the original friction pair can be maintained during installation.

Remantle the disener assembly in the gearbox body: first remove the clutch cover and the flywheel connection bolt, and then move the disener up and down from the flywheel. III) Disassembly and installation of the engine 1) Remove the 13 fixing screw of the cylinder head, note that the screw should be rotated from both ends to the middle, and remove the screw in 3 times. 2) Lift the cylinder head.

Remove the two M10×55 engine suspension bracket bolts, pull the engine back with the rear wheel and remove it. Remove from the engine suspension bracketLower the ignition coil, remove the engine mounting bolt M10×185 nut, remove the engine suspension assembly, and remove the engine assembly.