Boltigen R1234YF/R134a AC Oil & Dye Injector — Mini Shut‑Off Valve, 7.5–60ml Capacity

Boltigen's R1234YF/R134A AC Oil Dye Injector is a compact, hand-operated tool for safely injecting oil or fluorescent dye into low-side air conditioning systems.

This injector kit is built to work with both R1234YF and R134A systems and includes quick couplers for each refrigerant. Its knurled aluminum body, brass 1/4" SAE connector, reinforced rubber hose and a mini shut-off ball valve let technicians and DIYers meter small volumes of POE or mineral oil and introduce leak-detecting dye through the low-pressure suction port without needing heavy equipment.

How do I connect and use the injector on my vehicle or HVAC unit?

Attach the appropriate low-side quick coupler for R134a or R1234yf, secure the injector to the system's service port, and open the mini shut-off valve. Turn the knurled handle or push/rotate as directed to dose the compressor with the desired amount of oil or dye.

• Choose the correct quick coupler (R134a or R1234yf) supplied in the kit.
• Firmly snap the coupler onto the low-pressure service port and tighten the brass 1/4" SAE connector if needed.
• Use the rotary/push action to control injection; close mini valve when finished.

What fluids and capacities does the injector support?

The injector accepts fluorescent leak-detection dyes as well as POE and mineral oils commonly used in automotive and light HVAC systems. The hand-turn reservoir holds from about 1/4 oz (7.5 ml) up to 2 oz (60 ml), allowing precise, repeatable dosing for small top-ups or diagnostics.

• Compatible with POE and mineral compressor oils and fluorescent dyes.
• Capacity range: 7.5 ml to 60 ml for fine control during injection.
• Suitable for both car A/C and small home/office HVAC systems.

Is the tool durable and suitable for frequent shop use?

Yes—critical components are made from robust materials to withstand repeated service work. The main body uses anodized aluminum alloy for lightweight strength, the 1/4" SAE coupler is brass for corrosion resistance, and the hose is thick rubber to tolerate flexing and pressure changes.

• Aluminum-alloy main body resists dents and corrosion while remaining lightweight.
• Brass 1/4" SAE connector provides reliable, leak-free connections.
• Durable rubber hose reduces kinking and improves long-term serviceability.

Who is this for? Boltigen's oil and dye injector is ideal for independent mechanics, fleet technicians, and experienced DIYers who need a simple, portable method to add small amounts of oil or leak-detecting dye into low-side ports. It’s not a full-size refrigerant charging station, but rather a precision tool for diagnostic work, minor oil top-ups, and introducing dyes for leak tracing. If you regularly service R134a or R1234yf systems and want a compact, metal-bodied injector with dedicated couplers and a shut-off valve, this kit offers a practical, cost-effective solution.