VNG APPLICATIONS (Vehicular Natural Gas)
VW 1600 Air (modern) motor
Parts for internal combustion motors need lubrication, in order to avoid friction and, consequently, temperature increases.
VNG fuel, (Vehicular Natural Gas) contains no lubricants, resulting in a rise in engine temperature and all of the engines components, which are in friction with each other.
The areas that initially suffer the greatest impact include the cylinder head and all of the components in the valve train. When severe overheating occurs, we have the following situations in the head’s valve seat housing:
- The exhaust seats ( Cylinder Heads ) generally dilate in the same proportion as the motor cylinder-head casing (aluminum) at the temperatures caused by exhaust gases, and hardly release.
- The intake seats do not suffer the same impact of increased temperatures, with dilation occurring only to the cylinder head housing and not the intake seats which are released.
- The temperature increase in this region is caused by the lack of lubrication in the valves, which tend to lock up.
- We recommend that every 15 days, or 2.000 kilometers, the valves be calibrated, thus mitigating the effects and increasing the use of these motor-driven vehicles without damaging the cylinder heads, as well as the engine.