[Antonie]

Hi guys,

I own a 2007 BMW 330d (M57T2) Diesel vehicle.
It is time fuel filter replace for my vehicle. I did some research however I got some questions in my mind which is not sure, hope someone in here can give me a hand or share his own opinion or experience.

Q1. Fuel bleeding after fuel filter replacement? Yes or No??

Q2. In my knowledge fuel bleeding is for get air release purpose. But once I reconnected the hose with fuel filter. How/ where can the air release?

Q3. I found out a method to do fuel bleed as below,
(http://www.pelicanparts.com/techarti...eplacement.htm)
"If you do not have a scan tool, do not worry. To bleed without one, press the START button. Do not start the engine, place it in the RUN position, so the warning lights 9-check engine are illuminated. The fuel pump will run. Leave it this way for one minute. The fuel pump will prime. Then reset the ignition and attempt to start the engine. Allow the engine to idle for ten minutes. Shut the engine OFF, and restart engine. The fuel system should be bled."

ISTA indicated the same way also.
Is that the only way to do fuel bleed?

Q4. Do anything I need to be take care/ focus on?

[Ken Oath]

1. Yes, always bleed a diesel engine. This is primarily to lubricate the system with diesel so no air or particles damage the fuel pump.

2. The bleeding is done by the pump which primes the new filter and purges the system.

ISTA+ Bleeding Fuel System

1. Operations
2. Read Out Vehicle Data
3. Complete identification (takes a few minutes)
4. Display Fault memory (read & check codes)
5. Vehicle management
6. Service Functions
7. Power train
8. Digital Diesel Electronics
9. Bleeding fuel system

There is a timer which tells you how long remaining at each step. Takes about 10 minutes.

3. The Pelican method does not pre-fill the filter or use the manual priming method and as such is not good practice. In an emergency it could be used.

4. That ISTA screenshot is slightly different from the filter which should be on your vehicle. There is clamp forward of the filter which is recommended to change. Also you can use a Golf Tee to plug the fuel line to minimise diesel spillage.

[Boganian Rubes]

I did this some time ago, I don't know about any fuel bleeding. I just let the excess fuel spill out, patched in the new one and just ran the priming process. First engine run stopped after a minute, then ran for another 15 minutes fine. No issues since then. Instead of switching ignition on and off I get ignition on for a about a minute before starting. N47 but

[juld0zer]

Always bleed. We have some lazy buggers in the workshop who dont. They just change the filter and start the motor, let it stall and restart it and go for a drive up the hill. Then they come back and complain the engine light is on. Moral of story - air in the low pressure side can cause a stutter in fuel delivery. M57 are a little more forgiving due to the slightly lower operating pressure.

When done through ISTA/D, it is a two stage process. Stage one is 3 mins of running the lift pump to prime the filter and purge the air back to the tank via the return line. Stage 2 is 10mins of running the engine at approx 2000rpm with elevated rail pressure.

[Antonie]

Thank you for everyone advice and it makes me have more confidence into this project!!!!
Cheer!!!!