Quote:
Originally Posted by SMOKEY53
An update.
Shop did a balance test on the engine and found #6 cylinder out of spec.
Did a backflow test on the injectors and found 5 injectors were returning flow within spec but #6 way out. So #6 injector is shot.
Manifold came off and shop removed injectors and glow plugs for inspection. Found that #6 injector flange was broken, and injector was not sealing against the cylinder allowing compression to leak out.
Also needs CCV, Air filter, Fuel filter, EGR clean, glow plugs and glow plug controller replaced.....total of $3k. Some of this stuff I can do myself and had already purchased the parts pre-emptively - but the faulty injector is the bulk cost of the ordeal.
So my first week of X5 ownership has not done a lot to quiet the Break My Wallet stereotype! :-/
Assuming that the sound heard at the transmission area was just the piston slap echoing down through that chamber in the car - and being the rear most cylinder explained why it was better heard underneath than from the front of the car with the hood up.
Will keep you all posted.
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Hi Mat,
As mentioned to you via PM on 5th,ideally you should connect car to Bmw diag and get them to check the injector readings,as the knock noise could be injector!!As you found out,sometimes you really need to hook up your car to BMW diag equipment ,as other diagnostic equipment fails to register problems,although INPA is pretty good.
Can you tell me what the injector 6 value was on diag?
If it wasnt sealing ,have they checked the washer / o-rings?
You have 2 different issues here !Out of spec and not sealing.Many times we got out of spec corrected by simply cleaning the injectors exits as they get blocked.