Baotou North heavy truck parts engine cylinder block, cylinder head cracks or blocked at the end of the water seepage, leakage phenomenon, will seriously affect the engine life, so the leakage of water must be carefully examined.
The reason
Improper use of water seepage, leakage. Such as the Baotou beiben heavy truck engine parts under the condition of high temperature sudden cold, in the winter season starting when the sudden high water, or did not require the use of antifreeze fluid, the cylinder body and the cylinder cover is cracked, water blocking cover or bulge extrusion cracks caused by corrosion, cavitation water blocking cover is a.
Improper disassembly and maintenance. Not in accordance with the provisions of the order, method and torque fastening cylinder head bolts, so that the cylinder block and cylinder head is not uniform or impact crack; or replace the water blocking cover installation is not in place, deflection deformation.
Manufacturing defects. Such as centralized or casting residual stress is trachoma, aging treatment improper, thermal stress caused by the cylinder block, cylinder head, infiltration Water Leakage.
The processing method
Inspection of the North Baotou Ben heavy truck parts cylinder block, cylinder head, whether there is a crack, or a water blocking cover of the water leakage site, the pressure can be used 290~390kPa, the pressure on the cooling system to test, find out the location of cracks. Different repair methods were adopted for different parts.
Cracks in the higher temperature, the greater the force of the parts, such as combustion chamber and valve seat near the welding repair can be used.
When the cracks in the temperature is not high, the force is not part of the site, can use epoxy resin adhesive repair.
For small parts of the force, if there are a lot of small cracks concentrated together, or a small loophole, you can use the method of repair plate.
Found that there is a water plug corrosion and leakage of water, it is best to replace all the water cover. Replacement should pay attention to check the water cover of the lid off the corner of the crack, if there is a crack should not be installed.
After any of the above repair, should be tested again, to ensure that no leakage can be installed. If you do not have the repair conditions and technical level, should be replaced with new pieces.