- Function: Fuel injectors deliver fuel directly into the cylinder. Prolonged use may cause cracks or minor wear, potentially leading to engine instability, misfire, high fuel consumption, or oil leaks. This diesel injector puller safely removes injectors for testing, cleaning and replacement without removing the cylinder head. - Compatibility: Designed to assist in removing stubborn Bosch and Lucas diesel injectors and serves as a practical replacement for Bosch and Lucas injector tools. - Construction: Steel rod with two threads provides increased pulling strength to extract even tough injectors from tight positions. - How to use: With the engine off and cooled, install the tool on the injector. The stuck part gains weight, then transfer this weight to the shaft to pull the connected end and the injector in the desired direction. Repeat until the injector is removed. - Benefits: Easy and safe injector removal without cylinder-head removal; supports testing, cleaning and replacement; robust steel construction for repeated use. - Use scenarios: 1) Replacing or servicing diesel injectors in Bosch or Lucas engines. 2) Removing stubborn injectors during engine maintenance or rebuilds. 3) Testing or cleaning injectors where safe removal is required without cylinder-head removal.