Review on ATD Tools ATD-3302 25 Piece Master Cooling System Pressure Test Kit: Efficient Cooling System Maintenance Made Easy! by Stephen Thomas

Nice and complete set. So far I've only used it once. This was on a 2004 Volvo S40. The adapter provided did not fit. I reached the bottom of the tank before the o-ring touched the top of the neck (the threaded part) so it failed to seal. There was another Volvo that also failed! I had to double the o-ring and then it was almost tight. It was good enough that I could assume the slow loss of pressure was due to the tester cap and not the system.