Product Details: Downtime is costly. Engine failures due to undetected combustion leaks can cripple your fleet operations, leading to lost revenue and increased repair expenses. The LISLE 75500 Combustion Leak Detector provides a rapid and effective solution. This precision tool employs a simple yet highly effective color-change indicator. The included blue dye changes to yellow upon contact with combustion gases escaping into the cooling system, providing immediate visual confirmation of a leak. Simply connect the LISLE 75500 to your vehicles vacuum line or use the included adapter with a hand vacuum pump (for models post-June 2002). Insert the tapered end into the radiator opening and start the engine. The vacuum draws vapors through the dye, revealing any leaks instantly. This significantly reduces diagnostic time, minimizing downtime and allowing for quicker repairs. The LISLE 75500s robust design ensures reliable performance and long-term durability, making it a cost-effective solution for maintaining a healthy and productive fleet. Accurate and efficient leak detection saves your team time and money, keeping your vehicles on the road where they belong. Invest in the LISLE 75500 and experience the difference reliable diagnostics make to your bottom line.