CNG safety: Four signs your car’s gas conversion may be dangerous

According to Tribune Online, motorists switching to Compressed Natural Gas (CNG) to reduce fuel costs should watch for signs of poorly installed systems. The report highlights four major warning signs:

1. Gas odour or missing vent hoses: Gas should not accumulate inside the passenger cabin or boot. Proper installations require sealed cylinder compartments and external venting to safely direct leaked gas outside the vehicle.
2. Weak cylinder mounting: Improvised brackets, scrap metal or weak straps can allow the heavy, high-pressure cylinder to shift, potentially damaging fuel lines during sudden braking or crashes.
3. No automatic shut-off valve: A certified system should have safety valves that stop gas flow when the engine stops or during an emergency.
4. Uncertified cylinders: Welded, refurbished or improvised tanks should not be used for CNG. Motorists should check cylinder markings and certification.