Fuel Injector Leakage
WARNING: This page does not describe the selected car, but rather 34 other vehicles, including the 2001 BMW Z8, 2001 BMW Z3, 2001 BMW X5, 2001 BMW M5, and 2001 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.
- Remove fuel injectors. See FUEL RAIL & INJECTORS
in REMOVAL & INSTALLATION article. Mark sequence of injector valves relative to cylinders on each injector valve. Clip injector valves into Holding Fixture (13 6 205). Connect special tool to injector valves. Connect Harness (13 6 206) to a 12-volt battery. This removes the remaining fuel from the injector valves. Lay a clean cloth under injector valves to catch remaining fuel. Connect holding fixture to compressed air connection at maximum 43 psi (3 bar). Residual fuel is now blown out of the injector valves.CAUTION: Carry out leak test only after remaining fuel has been blown out of injector valves.
- Separate harness from injector valves. Install injector valves with holding fixture in a container with hot water at 140-176°F (60-80°C). Regulate air pressure at connection No. 1 on holding fixture to 43 psi (3 bar). Note volume of air emerging. Permitted volume of air emerging is 2 air bubbles per injector valve within a 15-second period. Injector valves with larger amounts of air emerging must be cleaned. Remove injector valves from water and dry with compressed air.