BT-3 BASIC Tester is equipped with a filter making it more powerful combustion leak tester in compare to the simplest BT-1 tester. Thanks to the filter, accuracy of the tester rise from 50% to 99.9% The simplistic design and the filter gives you the best price/performance ratio on the market. The blue fluid is not suitable for DIESEL engines as it changes colour to GREEN, making it more confusing with the interpretation of the test result. start the engine, insert the tester into the cooling system (radiator or expansion tank) and wait up to 5 minutes for the test result. Bear in mind that all measuring devices have some limitations. Understanding these limitations is absolutely crucial for effective diagnosis and could save you a lot of time. (see table below) BT-3 tester is immune to any contaminants making it more versatile and accurate device in detecting medium and big combustion leaks in combustion engines.

BEFORE USE, ALWAYS FLUSH THE TESTER WITH FRESH TEST FLUID!!! EXTRA FREE bottle for flushing INCLUDED!!!