Combustion gas (co2) leak tester kit (with vertical chambers)

  • Test of the presence of CO2 in the cooling system resulted from worn head gaskets, deformed cylinder heads or cracked engine blocks.
  • Quick and accurate use, with simple installation and no need to make an overhaul.
  • Provided with high quality US-made tester fluid and an extra empty bottle for used fluid storage, which can be self-regenerating for multiple uses.
  • V-shape rubber cone for universal application.
  • Compatible with all other radiator testing adapters provided by 9 CIRCLE.
  • Stock Ref. No. 9CL-71025
  • Dimensions
  • Instructions
  • Downloads
  • Video
Packing BMC
Packaging 5 sets/carton
N.W 1.25 kg/set
12.5 kg/carton
G.W. 13.5 kg/carton
Size 35 x 24 x 8.6 cm/set
Size 49.5 x 44.5 x 36.5 cm/carton


  1. Prepare a container and remove the approximately 1/10 of the volume of coolant form the radiator.
  2. Disassemble the rubber cone from the detector.
  3. Install the rubber bulb, cap, upper chamber, lower chamber, brass adapter, and the available radiator cap one after another (this way could provide a safer and more accurate test). And then, fill the upper chamber with blue detector liquid till the black line.Alternative installment for the situation when there is no available radiator cap.
    1. Install the rubber bulb, cap, upper chamber, lower chamber, and rubber cone one after another.
    2. Please hold the detector body as operating.
  4. Pump the rubber bulb continually to draw the steam from radiator.


  • If exhaust gas presents in cooling system, the color of test liquid turn from blue to green or yellow when the steam mixes with CO2 detector liquid in detector.
  • If the detector liquid still in blue during test operating, it means the gasket keeps in good condition.