First, the engine cylinder tightness testing

Factors affecting the sealing of the cylinder has seven, the main cylinder wear, piston ring damage, piston wear, damage the valve seat and valve guide wear, several aspects of the cylinder head gasket is damaged, valve clearance and other issues.

Commonly used diagnostic methods which Nigeria? There are measuring cylinder pressure, crankcase channeling gas cylinder gas leakage and leakage rate, intake manifold vacuum, cylinder piston group because of excessive wear caused by vibration measurement of large abnormal sound, the crankcase wear metal particle content Determination.

For the measurement of cylinder compression pressure, the main pressure is the end of a four-stroke engine compression time. Since the cylinder under pressure and oil viscosity and the like with the cylinder-piston group, adjust the gas distribution mechanism is correct, sealing and other factors cylinder pad, so when measuring engine cylinder pressure, and can diagnose cylinder piston group seal, if piston rings, valves, cylinder head gasket sealing, if good, then the valve clearance must be appropriate.

Second, the mufflers securely Detection

Muffler outer cylinder and the inner honeycomb body constituted in two parts due to high temperature, vibration, and other special circumstances are covered buttons by mechanical processes combined. We know the quality of this process depend on the design of precision, if the combination is not strong in car use due to high temperature, vibration and other factors caused by loose or fall off. But let us be assured that the quality of the first relevant departments have made very strict requirements for the technology.

For practical detection method detection tool industry are using the universal testing machine with compression plate jig, so that the muffler two member up and down by the relevant shear. The measured results of repetitive error should be less than 5%.

Third, the interior detection

Interior includes a seat formed materials, interior decoration materials box and bonding adhesive. The main testing their safety: 1. 2. harmful gas flame retardancy.