The Anatomy of an AC Gas Leak
A car's air conditioning operates as a completely sealed, closed-loop pressurized system. Under normal conditions, the R134a or R1234yf refrigerant should last the lifetime of the vehicle.
However, vehicles in Kolkata endure extreme conditions. The constant vibration from potholed roads, combined with high humidity and heat, causes rubber O-rings to dry out, aluminum pipes to chafe, and microscopic pinholes to develop in your cooling coils. If a mechanic tells you it's normal for gas to just "evaporate" every summer, they are either misinformed or trying to sell you a recurring gas top-up.
Our Advanced Detection Protocol
Finding a leak in an automotive HVAC system can be like finding a needle in a haystack. The gas is invisible, odorless to humans, and evaporates instantly upon hitting the atmosphere. Here is how Daga Autolek definitively isolates the problem:
High-Pressure Nitrogen Testing
This is the gold standard. We evacuate your remaining gas and pump dry Nitrogen gas into the system at high pressure (up to 250-300 PSI). We then monitor precision pressure gauges. If the pressure drops even slightly over 30 minutes, a leak is confirmed. Note: We never use regular compressed shop air, as it introduces system-destroying moisture.
🛑 Warning: Never Use "AC Stop Leak" Sealants
Many cheap garages and DIY kits sell aerosol cans of "AC Stop Leak" promising to seal holes from the inside. Do not use these. These chemicals react with moisture to form a hard glue. Not only will it fail to seal the leak permanently, but it will travel through your system and harden inside your expensive AC Compressor and Expansion Valve, completely destroying the entire system. What could have been a ₹2,000 O-ring repair becomes a ₹40,000 system overhaul.
The 4 Most Common Leak Locations
Through our decades of experience at Exide Crossing, we have mapped out where specific vehicles are most likely to fail.
1. The Evaporator (Cooling Coil)
Buried deep behind the dashboard, this coil constantly deals with condensation. Over time, it corrodes and develops microscopic pinholes. (Highly common in Skoda, VW, and older Hyundais).
2. The Condenser
Located at the very front of the car behind the grill. It is highly susceptible to rock strikes and debris off the road, which can easily puncture the thin aluminum tubes.
3. Compressor Shaft Seals
The AC compressor has a rotating shaft. If the AC isn't used frequently during winter, the rubber seal dries out and shrinks, allowing gas to escape from the compressor body.
4. Schrader Valves & O-Rings
The simplest and cheapest to fix. The small valves where mechanics connect their hoses can leak, as well as the rubber O-rings at every pipe connection joint.
Stop the Cycle of Refilling
If you find yourself refilling your car's AC gas every single summer, you are throwing money away and harming the environment. Bring your vehicle to Daga Autolek for a definitive diagnostic. We find the leak, show you the evidence, repair the damaged component, and guarantee the seal.