Aupoko AC Oil Injector Kit — 2 oz Screw‑In Refrigerant Oil & Dye Injector for R134A/R1234YF with Quick Couplers

The Aupoko AC Oil Injector Kit is a handheld, screw‑in tool that injects up to 2 oz of oil or fluorescent dye into automotive and HVAC refrigerant systems without running the compressor.

Designed for technicians and DIYers, this compact injector gives controlled, pressure‑isolated delivery of lubricants and leak‑detecting dyes into low‑side ports of R134A and R1234YF systems. The kit includes both R134A and R1234YF quick couplers, a 2 oz hand‑turn clear oil cylinder, and a brass hose assembly so you can add oil or dye precisely when the system is off or under service conditions.

How does the injector get oil or dye into a system without the compressor running?

The Aupoko injector uses a screw‑in piston design and a one‑way check valve to push fluid directly into the low‑side service port. This eliminates the need to operate the compressor during injection, which is useful for systems that are low on oil or cannot be run safely.

• Hand‑turn screw mechanism for controlled displacement
• Built‑in check valve prevents backward flow into the cartridge
• Clear 2 oz cylinder lets you watch the volume injected

Which refrigerants and oils is this compatible with?

The kit is built to work with common mobile and light HVAC refrigerants like R134A and newer R1234YF, and it accepts POE and mineral oils as well as standard fluorescent dyes. It also includes two low‑side snap couplers to match those service ports so you can connect without adapters in most cases.

• Compatible with R134A and R1234YF low‑side ports
• Accepts POE, mineral oils and fluorescent leak dyes
• Includes both 13mm R134A and 14mm R1234YF quick couplers

What features make installation and use straightforward?

Installation breaks down into three simple parts: attach the check valve to the cartridge, thread the inner and outer cylinders, then purge a small amount of air through the inner core before final coupling. The aluminum body and brass fittings are corrosion resistant and designed for repeated shop use.

• Three‑part assembly for fast setup and cleaning
• Durable aluminum body with brass hose connector
• Simple purge step to remove trapped air before injection

How much fluid does it hold and what’s included in the package?

The transparent injector cylinder holds up to 2 oz (60 ml), with an inner removable 1/4 oz (7.5 ml) sizing for smaller doses. The kit supplies everything needed to start injecting into most vehicle AC systems right away.

• 2 oz (60 ml) push‑in type hand cylinder; inner core 1/4 oz (7.5 ml)
• One R134A low‑side 13mm quick coupler and one R1234YF low‑side 14mm quick coupler
• Aluminum injector body, brass hose, and check‑valve fitting included

Who this is for: This Aupoko injector is aimed at automotive technicians, HVAC service professionals, and informed DIY enthusiasts who need a safe, accurate method to add oil or dye without running the compressor. It’s particularly useful when topping off lost lubricant, introducing fluorescent dye for leak detection, or performing maintenance on systems that cannot be energized during the procedure. If you service multiple refrigerants or prefer a portable, metal‑bodied injector with quick‑connect options, this kit provides a compact, ready‑to‑use solution.