Can the engine open normally if one of the screws is broken?

If one of the engine mount fixing screws is broken, the engine will not be able to maintain balance, and the danger is very high.

Hello, may I ask the screws of **, generally broken one is dangerous to open.

Hello, which part of the engine is the screw?

Hello, may I ask what screw is broken.

1. Screw quality problems, or insufficient tightness of the screws, too tight rocker arm shaft, too large or too small valve clearance, and top valve phenomenon will cause the rocker shaft screw to break.

2. Rusty screws, excessive torque, and excessive force will cause the screws to break, which is generally not tightened when it is installed, and then it is interrupted when it rotates at high speed.

How to remove the screws:

1. Remove the sludge on the surface of the broken screw and broken head, install a drill bit with a diameter of 6 to 8 mm with an electric drill to drill a hole in the center of the section, after the hole is drilled through, remove the small drill bit, replace it with a drill bit with a diameter of 16 mm, and continue to expand and drill through the hole of the broken bolt;

2. Take the welding rod with a diameter of less than millimeters, use small and medium-sized current to drill the hole in half the entire length of the broken bolt from the inside to the outside, and the arc should not be too long when starting the surfacing welding, so as not to burn through the outer wall of the broken bolt. After surfacing to the upper end face of the broken bolt, continue to surlay a cylinder with a diameter of 14 to 16 mm and a height of 8 to 10 mm;

3. After surfacing welding, hammer the end face with a hand hammer to make the broken bolt vibrate along its axis;

4. When it is found that a trace amount of rust leaks from the fracture after knocking, the nut of M18 can be put on the column head of the surfacing weld and welded the two;

5. After welding, twist the broken bolt back and forth on the nut with a plum wrench glove while it is hot;

6. After taking out the broken bolt, use a suitable tap to process the thread buckle in the frame to remove the rust and other debris in the hole.

1. Causes of cylinder head flushing:

The engine temperature is too high (the "boiling" exceeds the critical line of the engine temperature); The temperature exceeds 100°C and continues to drive until the engine turns off on its own (the cause of the high temperature has been mentioned earlier);

When the temperature is too high and the engine extinguishes itself, the hood should be opened and let it cool naturally (at this time, the expansion valve cover must not be opened to be burned) and then add water.

2. Causes of cylinder head deformation:

When the temperature is too high, continue driving until the engine turns off on its own, and immediately open the expansion valve (the user uses a towel or something else to prevent steaming.

gas scalding) immediately add cooling water, then the cylinder head will be deformed and scrapped.

The engine cylinder head screw is broken, let's take it out for him with electric welding, and you can learn it by hand.