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DIY: Do It Yourself
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Old 03-26-2014, 04:47 PM   #1
Kevin Mack
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X3 Intake Manifold

I am now changing the crankcase vent valve on my 2004 BMW X3 (M54). I just bought this car a few months ago. I started taking it apart and noticed a hole on top of the intake that isn't capped, twigs and **** sticking out of it. I don't know what goes in that hole. I will send a photo. Please look at it and tell me if it's missing a cap? Or maybe an O2 sensor? And please tell me if you would advise me to take the whole intake manifold off and just make sure that nothing fell into the cylinder below it?


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Old 03-26-2014, 11:02 PM   #2
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Old 03-26-2014, 11:56 PM   #3
330i4me
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looks like a critter was living under the hood
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Old 04-03-2014, 05:31 PM   #4
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who changes a crankcase vent with done up nails?

but anyway I think some m54s put a temperature sensor there. Has the car been modified in anyway? Sometimes people will move that temp sensor further away for a colder reading.
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Old 04-04-2014, 02:20 AM   #5
Kevin Mack
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Thanks drumbum! I don't think anybody has altered it from the original, but I could be mistaken. Somebody commented that the later M54s integrated the intake temperature sensor with something else and don't have it there in that spot anymore and said it was probably only a cap that was supposed to be there and may have broken off. Now all I need to do is figure out some way to determine if some part of that broken cap has fallen into the cyllinder directly below. Any ideas?


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