As a flexible pipe connector, the coolant hose is widely used in automobile accumulators and auxiliary heat exchangers.In order to ensure the smooth flow of coolant into the manifold and valve body, the coolant hose adopts a peculiar tree-shaped multi-branch sub-channel structure.The coolant hose must not only meet the functional, structural size and performance requirements, but also be fully compatible with the extremely complex and compact layout of the cabin.
Not to mention the influence of design, the high temperature radiation and oil immersion of the engine will also gradually age the outside of the coolant hose.But in any case, the most common aging is from the inside out.Therefore, when there are tiny pinholes on the outside, it means that serious corrosion has occurred inside the hose.The wear channel is the result of electrochemical corrosion and the natural phenomenon of micro-battery effects in the cooling system.Oxygen in the air is one of the main factors that cause chemical reactions, so improving the filling process of the cooling system can effectively avoid such accidents.
When a large amount of coolant leaks, the fault is clear at a glance.However, the key to the problem is how to diagnose the corrosion inside the hose without disassembling the hose.The following methods can help you quickly and accurately find the dying coolant hose: Knead the hose by hand, especially the radiator, bypass, manifold, valve body and the upper part of the heater hose, the connection end is the most important.If there is a significantly soft or inelastic handle at the kneading place (compared with other parts), it indicates that the hose there is severely corroded.If the mileage of the vehicle is low at this time, it is recommended to check the voltage of its cooling system.During the inspection, the negative electrode of the voltmeter is connected to the ground electrode of the battery; insert the positive electrode into the coolant (do not touch any metal parts).If the voltage reading is above 0.3V, a comprehensive and systematic inspection of the vehicle's ground electrode is required.At the same time, make sure that there is no auxiliary ground electrode connected to the radiator bracket.
For flexible pipe passages, even if only one branch leaks, it is wise to replace the entire coolant hose, otherwise it will be twice as effective.
Although most hoses can be flexibly installed without kink, almost all hoses use a molding process, because the molding hose is more suitable for the needs of compact installation space.
Oem clamps for coolant hoses usually use a spring belt structure.The elastic snap ring causes compression deformation inside the hose, thereby achieving a tighter connection and uniform continuous pressure.However, when the end of the hose connection is slotted or deformed, the sealing performance of the OEM elastic buckle is not as good as that of the high-quality maintenance clamp.The maintenance fixture mainly includes a shrink belt that can continuously adjust the compression force and a worm drive type with tension.Among them, the turbine clamp can be rotated 360 degrees around the circumference.Uniform pressure is generated in the direction of the bolt, and the compression deformation generated by compression ensures the reliability of the fastening connection.
