What Maintenance Is Required for a CNG LPG Converted Vehicle and Fuel System?
Maintaining a converted CNG/LPG vehicle is simple, low-cost, and essential for ensuring long component lifespan and smooth engine performance. Following a regular servicing schedule guarantees continuous fuel economy and reliability.
Recommended Maintenance Schedule
| Maintenance Task | Recommended Interval | Description |
|---|---|---|
| Gaseous Phase Filter Replacement | Every 10,000 – 15,000 km | Replaces the inline filter between reducer and injector rail to trap impurities and oil residues. |
| Liquid Phase Filter Replacement | Every 20,000 – 30,000 km | Cleans the filter mesh located inside the LPG/CNG reducer solenoid valve. |
| Injector Rail & Reducer Inspection | Every 20,000 km | Inspects gas pressure stability, rubber seals, hose clamps, and valve seat cleanliness. |
| Cylinder / Tank Hydro-Testing | Every 3 to 5 Years | Mandatory safety hydro-static pressure test carried out by certified testing centers. |
Frequently Asked Questions
How often should gas filters be replaced on a CNG/LPG vehicle?
The gaseous phase filter should be replaced every 10,000 to 15,000 km, while the liquid phase filter inside the reducer valve should be replaced every 20,000 to 30,000 km.
How often does a CNG/LPG cylinder need safety testing?
CNG and LPG storage cylinders require a mandatory hydrostatic pressure safety re-test every 3 to 5 years by a certified testing facility, depending on local regulations.
