When a diesel generator set exhibits oil, water, or air leakage, it can lead to increased fuel consumption, accelerated 

component wear, reduced power, and other malfunctions. Therefore, timely repairs are essential. Below are the methods 

for handling oil, water, or air leakage in diesel generator sets:

1. **Gasket Addition Leak-Stopping Method**  

   If oil leaks occur at the anti-leak gasket of the diesel engine’s oil pipe joints, a thin, double-sided smooth plastic gasket 

can be added on both sides of the anti-leak gasket. Tightening it firmly will prevent leakage.

2. **Shellac Solution Leak-Stopping Method**  

   For leaks at joints such as the diesel engine’s fuel tank, water tank, or crankcase, shellac can be soaked in alcohol and 

the solution applied to the cleaned joint to stop the leak. However, shellac is costly and is typically used only in urgent situations.

3. **Oil-Based Leak-Stopping Method**  

   If paper gaskets at the diesel engine’s oil pan, cylinder head, gear cover, or crankcase rear cover leak, as long as the 

gasket is intact and the mating surface is clean, applying a layer of butter on both sides of the gasket and tightening the 

bolts can prevent leakage. When replacing with a new paper gasket, soak it in diesel fuel for 10 minutes before installation, 

then wipe it clean, apply a layer of butter to the mating surface, and install it.

4. **Liquid Sealant Leak-Stopping Method**  

   When defects such as pits, grooves, or cracks in solid gaskets on the diesel engine cause interface or destructive leakage, 

apply a liquid sealant to the cleaned mating surface of the solid gasket. After curing, it forms a uniform, stable, and continuous 

adhesive peelable film gasket, effectively preventing all types of leaks.

5. **Anaerobic Adhesive Leak-Stopping Method**  

   For leaks at ventilation bolts, double-ended bolts, or screw plugs on the diesel engine, apply anaerobic adhesive to the 

cleaned bolts, threads, or screw holes. It quickly cures to form a film, filling gaps between parts and withstanding significant 

pressure. It also provides strong anti-vibration and anti-loosening fastening functions. This method is particularly effective 

for leak prevention at high-pressure fuel pipe joint threads on diesel engines.

6. **Dimension-Restoring Adhesive Leak-Stopping Method**  

   For leaks at shafts and sleeves, bearings and bearing housings, valves and valve seats, self-tightening oil seals, felt cups, or 

packing materials on the diesel engine, apply dimension-restoring adhesive to the cleaned worn areas of the mating parts. 

After curing, it forms a wear-resistant, heat-resistant, and mechanically strong film layer. Then, perform machining operations 

such as turning, boring, scraping, or filing to restore the part’s geometric shape and mating precision, thereby resolving the leakage issue.

7. **Bonding Adhesive Leak-Stopping Method**  

   For leaks caused by sand holes or air pockets in components such as the fuel tank, water tank, oil pipes, or water pipes on 

the diesel engine, apply bonding adhesive to the cleaned damaged area to effectively stop the leak.