2008 X5 3.0si #6 injector replacement - Looking for a DIY

[xchen]

I am looking for a DIY to replace fuel injectors. A pointer would be very much appreciated.

A search on the forum did not generate a DIY.

[pshovest]

Similar N52 engine is used in 3 & 5 series. Should be easier to find DIY for one of them.

[xchen]

Well, have not received DIY related info so I started on my own and here are the steps I have taken:
(1) Remove the air filter components and its bottom mounting bracket as well as the engine cover. So the top looks like this:

[xchen]

(2) Place a cut-cake tin foil under the pressure release valve, unscrew the cap and use a screw driver to press the inner pin to release internal pressure (some gas fluid would come out):

[xchen]

(3) Put the cap back on and move the tin foil cup to under the fuel connector that has the GREEN plastic dis-connector pusher. Push the GREEN plastic dis-connector and pull the fuel supply line out. A lot of fuel would come out.

[xchen]

(4) Make sure that battery is disconnected. You can do this before disconnecting the fuel supply line. Then secure the supply line away from the injectors with a wire.

[xchen]

(5) Use and flat screw driver to release the clip on the injector's electric connector and disconnect the wire port. I used the flat screw driver tip to push one end slightly outward and, at the same time, tilt the port a little towards the same side, hold the port; then do the same with the other end of the clip; the port should come out easily.

[xchen]

(6) With all 6 connectors disconnected, use a 10mm socket to loose the 4 bolts that hold down the injection fuel distribution bar (see #2 photo in Step 1). Then hand pull the bar outwards; do not bend or wiggle; hand pull with patience. You are looking at this with the injectors out:

[xchen]

(7) Handle the injection bar with care as some fuel would come out. Each injector is secured to the distribution bar with a stainless steel clip; use a flat tip screw driver to release the clip; small turn and pull the injector out. Mine was very tight; just apply small force to turn the injector slightly and pull at the same time. While doing this a lot of fuel would come out of the hole as air gets inside of the bar. So be prepared to catch the fuel.

When inserting a new injector, do the same small-turn and push until the clip grove is about 1 mm above the seat. Then insert the clip to secure the injector. You should hear 2 metal clip sound, which are produced by the 2 clip side tabs securely seated with the 2 notches on the injector seat. To understand this, before inserting the injector, look over the housing seat that has 2 outward tab/notch.

Put back everything in the reverse order, then you are done.

Hope this helps.

[ard]

nicely done. thx