Removal and installation valve injectors (BMW 5 Series E39)

New valve injectors are coated with a preservative lubricant. After five minutes of operation, this lubricant is washed away by the fuel flow. Due to the risk of corrosion, used valve injectors cannot be stored for a long time.

Removal

Unscrew the oil filler cap. Press the small "arrow" caps with a narrow screwdriver and loosen the bolts located underneath. Remove the 2 plastic trim panels from the engine.



Disconnect the plug connectors of the oxygen sensors. Disconnect the plug from the VANOS solenoid valve.

Remove the valve injector plug cover and set it aside.

Warning: Fire hazard, no smoking. Fuel supply system is under pressure. Collect leaking fuel with a rag. Loosen clamps and disconnect fuel supply hose "1" first (coming from the fuel filter), then the fuel outlet hose "2" from the distribution manifold. After loosening the clamps, always replace them with new ones.

Note: On some models, the fuel supply line is screwed directly to the distribution manifold. In this case, the sealing ring must always be replaced with a new one during installation and lubricated with technical petroleum jelly.

Another possible implementation is to fasten the hoses with clamps. In this case, a special BMW tool 161050 is required to release the clamps. Check the sealing ring before installation, replace the damaged ring.



Remove the bolts securing the fuel manifold "arrow".



Remove the vacuum hose from the fuel pressure regulator nipple "1". (2 - fuel outlet nipple; 3 - place of attachment).



Pull the fuel manifold out of the cylinder head with an upward movement, complete with valve injectors. The valve injectors are only inserted into the cylinder head and can be pulled out freely.

Remove the clamps "4" on the side and remove the valve injectors.

Installation

Insert the valve injectors into the manifold and secure with clamps.



Pre-lubricate sealing rings "1" with Vaseline or SAE 90 transmission oil.

Insert the valve injectors complete with the distribution manifold into the cylinder head.

Caution: When installing the valve injectors, make sure that the sealing rings "1" are not damaged. Replace damaged sealing rings, paying attention to the installation position of the sealing ring "3". Lubricate the sealing rings "1" only with Vaseline or transmission oil before stopping.

Tighten the 2 fuel distribution manifold mounting bolts.

Connect the fuel hoses to the fuel rail and secure them with new clamps or O-rings, see "Removal".

Place the plug cover on the valve injectors.

Install and secure both engine covers, tighten the oil filler cap.

Read the contents of the DMe system fault code memory. After troubleshooting, erase the memory contents.

(The text is based on materials from the website: «BMWMAN.ru»)