Diesel engines sometimes leak oil during operation. A simple solution is to:
Return Fuel Injector to Injector Pipes
Fuel injectors are precision components. If the engine uses unclean diesel fuel or has been used for a long time, the injectors may wear down and leak oil. However, replacing injectors is expensive and uneconomical. To prevent leakage, the oil can be returned to the fuel tank through a return line or into the diesel fuel filter. If the return line is damaged, a piece of plastic tubing can be used to guide the oil into a container, filter it, and then pour it back into the fuel tank.
Oil leaks in the fuel supply system can be handled appropriately depending on the situation: If the washer of the hollow screw in the fuel supply pipe is uneven, remove the washer, grind it flat, and then reinstall it. If the problem persists, replace the washer with a new one, or cut a washer from thicker, soft plastic material and replace it. Leaks at the junction of the plastic fuel supply pipe and the metal joint are mostly caused by hardening or cracking of the plastic pipe. Cut off the hardened or cracked part, soften it with hot water, and while still hot, install it on the metal joint, then secure it with wire. If the metal fuel supply pipe is cracked and leaking, the crack can be soldered. Furthermore, to prevent fuel supply pipe cracking, the bending angle should be appropriate during installation; do not force it during installation, and ensure the pipe body does not contact the engine body to avoid damage.
Valve Cover Leaks
If the valve cover is tightened too forcefully during installation, it can easily deform and leak oil. At this point, the leaking valve cover can be removed, carefully hammered and reshaped with a wooden stick to restore its flatness, then a shim can be placed on top and it can be reinstalled.
