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Old 03-25-2019, 01:53 PM
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2003 BMW X5 4.6is noise

Having a strange noise coming from engine bay, no check engine lights and if occurs after about 10 min after start up. Maybe itís the alternator shit the bed but I want to be sure before I purchase one.Hereís a link to the video I took.

https://m.youtube.com/watch?v=bcDqhi_A9ZE
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Old 03-25-2019, 08:35 PM
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Hmm, hard to tell.
Does the noise go away after a while? Did you test the alternator or just guessing?
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Old 03-26-2019, 12:03 AM
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2003 BMW X5 4.6is

No I havenít tested the alternator yet, Iím guessing alternator because the vehicle has almost 110,000 miles and they are common to failing in the x5ís. Also does a bad alternator trigger a check engine light?
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Old 03-26-2019, 01:28 AM
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Yes an alternator can give you fits, as to checking on a noise I use the old shade tree method of a wooden dowel rod.

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Old 03-26-2019, 08:40 AM
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2003 BMW X5 4.6is

I appreciate it guys, the red battery icon illuminated today which is the alternator.
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Old 03-26-2019, 07:49 PM
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Have your timing chain guides been done?
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Old 03-27-2019, 12:42 AM
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BMW X5 4.6is

Not yet, it has 105,000 miles and no problems yet (knock on wood) but a buddy of man had a 540i that went all the way up to 220,000 miles on original guides and told me his secret was 10w-50 in the summer time.
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Old 03-27-2019, 10:38 AM
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Just donít wait to late for guides, especially with a 4.6. The motors are rare and if the guides go, it typically trashes the engine, which you canít replace, not easily like a 4.4. Did mine at 120k, 15 years. Found them extremely brittle, which should not be the case. You could grab an edge and easily snap off a chunk.
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Old 03-27-2019, 05:21 PM
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Quote:
Originally Posted by Nice540bro View Post
Not yet, it has 105,000 miles and no problems yet (knock on wood) but a buddy of man had a 540i that went all the way up to 220,000 miles on original guides and told me his secret was 10w-50 in the summer time.
Do yourself a favor and get the timing guides done on the X5. You will want to preserve your 4.6is engine. Its time
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