What is the principle of engine assembly gluing sealing?

RTV silicone sealing features: liquid sealing gasket has good filling characteristics, can completely fill the uneven gap on the surface of the sealing parts, so as to block the leakage, liquid sealant into a liquid state, and has a certain viscosity, has a good adhesion effect on the joint surface, can ensure that all points of the base surface adhere together, effectively prevent interface leakage, at the same time, the liquid sealant does not have any compression deformation, no internal stress. There are no slack and creep, no destructive factors such as elasticity, and the viscosity of the colloid is very high, so that the liquid sealing gasket has a prominent anti-leakage effect.

There are two main types of liquid sealing gaskets, namely silicone seals and anaerobic seals. All are formed on site. The engine assembly line is mainly made of RTV silicone.

Its sealing principle: it is coated to the surface of the parts through the glue gun or gluing equipment, and after the parts are assembled, the silica gel reacts and solidifies by absorbing the moisture in the air to form a highly elastic rubber gasket, and then forms an effective sealing effect.

The occasions for the use of RTV gluing in the engine mainly include: cylinder block, lower cylinder block joint gluing, front cover gluing, oil pan gluing, rear oil seal cover gluing.

The application of sealants is very common in the assembly process of engine production. The long-term stability and reliability of meeting the large-scale rapid assembly and sealing of the engine is closely related to the strict implementation of the application process specifications of the sealant. It is of great significance for engineers in the automotive engine industry to understand the curing principle and characteristics of silicone rubber plane sealant, and to understand the influence of different drying times on the sealing and bonding performance of silicone seal of plane seal.

If the valve cover is relatively clean and flat, and the seal is in place, it can also be without sealant. Because it is taboo to install the engine gasket with sealant, if you are repairing the car, it is recommended to communicate with your peers, if you are the owner of the car, it is recommended to change the repair shop, the correct installation method is to apply some clean oil evenly on both sides, generally it is like this, mainly depending on what material your head gasket is.

Engine detection starting systemFor the engine can not start this kind of fault, the first work to do is to detect the circuit in the engine starting system, from the most basic form of composition, the circuit of the starting system generally includes the following most basic and wide parts, namely the battery, the engine and the cable connecting these parts, etc., in addition to the ignition switch, starter, relay or electromagnetic coil, as well as the vehicle anti-theft system, etc., are also an important part of the starting system.

The glue used in the assembly of automobile engine, chassis, gearbox and steering machine is sealant, that is, in order to prevent the leakage of oil, gas and water - the liquid sealant is coated at the joint surface of various components, in which various anaerobic adhesives are applied on some threaded parts to prevent leakage at the same time, there is also an anti-loosening fastening effect.

There are 2 pressures inside the engine, so it should be sealed, and water, oil, and dust should be separated. The sealing is good, the work efficiency is high, and the machine is not easy to age.

You're talking about domestic production, right? If your new engine has sealant, it proves that there is a problem with the assembly, and the imported or domestic original engine does not use sealant because of the good sealing of the gasket. The use of sealant is used when the gasket of the engine cannot meet the good compactness, so as to ensure that the engine will not leak oil, air and water, and is generally used during maintenance.

Almost all joints are required, including 2113 brackets with padding. than 5261 such as the gear chamber shell and the body of the connection 4102 joint, the oil pan and the cylinder block even 1653 joint. However, there is no need to paint between the cylinder block and the cylinder head, only apply anaerobic glue on the cylinder head fastening screws, which is too much, look at the body assembly drawing.

During the overhaul, it is basically the water pipe, oil pan, oil seal, front and rear end covers, water scale, direct glue, and direct oil wiping on the cylinder head.

The adhesive used in the assembly of automobile engine, bottom plate, gearbox and steering DU machine is sealant, that is, in order to prevent the leakage of oil, gas and water of "three leaks" - DAO - oil, gas and water, and the liquid sealant is coated at the joint surface of various components, in which various anaerobic adhesives are applied on some threaded parts to prevent leakage at the same time, there is also an anti-loosening fastening effect.

Sealant sealing glue is a sealing material that deforms with the shape of the sealing surface, is not easy to flow, and has a certain degree of adhesion. It is an adhesive used to fill the gap in the configuration and act as a seal. It has the functions of anti-leakage, waterproof, anti-vibration, sound insulation, heat insulation, etc.

It is usually made of dry or non-dry viscous materials such as asphalt, natural resin or synthetic resin, natural rubber or synthetic rubber as the base material, with inert fillers such as talc, clay, carbon black, titanium dioxide and asbestos, and then added plasticizers, solvents, curing agents, accelerators, etc.