Head Check Combustion Leak Detector Fluid Cooling cylinder CO2 Gree Made in USA

1. Vehicle should be cold or cool. If vehicle cooling system is hot, do not attempt to remove the header tank cap or radiator cap. Wait until it cools down. 

2. Assemble the leak detector; the upper chamber is a push fit into the lower chamber, twisting will aid assembly (refer to diagram). 

3. The rubber cone allows the leak detector to be held in place on a header tank or radiator opening. 

4. Fill the upper chamber of the leak detector with the supplied test fluid to the dotted line. 

5. Wear thick, protective gloves and eye protection as there is a risk of escaping steam and hot water. 

6. Remove the header tank cap or radiator cap (refer to 1. above). Turn on the engine and let the cooling system warm up. 

7. When cooling system is near normal operating temperature place the tester on to the header tank or radiator opening and hold it down firmly so that it makes an effective seal against the opening. 

8. As pressure builds into the lower chamber, you may see bubbles appearing in the blue test fluid; at this point pump the rubber bulb to draw the vapour into the upper chamber and through the test fluid.. 

9. If the fluid turns green/yellow this indicates the presence of CO2 in the coolant and the need to investigate further. 

10. Remove the leak detector from the opening and turn the engine off. 

11. Replace the header tank or radiator cap. 

12. Dismantle the upper chamber from the lower chamber by twisting them apart. Pump the rubber bulb several times to draw fresh air through the test fluid. When it has returned to its original blue colour it can be returned to the container and used aga