AUTOOL SDT102 Automotive Smoke Leak Detector – Professional Pipe System Diagnostic Tool. With a compact and portable design, it is easy to operate for both professional technicians and DIY users. The AUTOOL SDT102 detects every type of leak across crankcase, oil seals, intercooler air systems, throttle valves, intake manifolds, exhaust pipes, fuel tanks, various pipe fittings, and coolant tanks.