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Old 12-07-2007, 06:28 PM   #1
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Default CTS engine chatter.

Since it'* gotten cold out I've noticed something pretty disturbing on my 05 3.6 CTS. When the engine is started blow freezing there is a very loud chatter like an oil-starved engine would make. This is the first car that I have EVER had that has made this type of noise. It makes me pretty uneasy on a 2 year old car with less than 70,000 miles! This is my 4th car, and the 1st to do it.

I took a video to help in figuring the problem out. Thanks!
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Old 12-07-2007, 06:32 PM   #2
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Below freezing? You think the temperature differential is creating a size difference that causes rubbing? Also, certain oils are for different temperatures, so the oil may be out of an efficient temperature range.

I dunno, I'm a noob but I just want to contribute.
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Old 12-07-2007, 06:33 PM   #3
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WTH kind of noise is that? And does that motor have a cold idle miss?

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Old 12-07-2007, 06:38 PM   #4
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It doesn't seem to have any kind of miss to it. It idles really smooth. Just for the record, I'm running Mobil 1 5W30 as Cadillac recommends so I'm stumped. Oil level is also normal. I'd check oil pressure, but the 3.6 doesn't come with an oil pressure sensor even.
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Old 12-07-2007, 07:17 PM   #5
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Sounds to fast to be motor related IMO. Is it possible that maybe the ABS system is just making alot of noise during it'* self test in the cold weather?

Ed
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Old 12-07-2007, 07:22 PM   #6
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It'* definitely coming from the engine internally.
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Old 12-07-2007, 07:25 PM   #7
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Moved to the new section for greater visibility. Read the forum description for this section, and you'll find that discussing mechanical issues on your other Rides is encouraged here.
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Old 12-07-2007, 07:35 PM   #8
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My BMW makes strange sounds when warming up too. Must be a high end car thing lol?
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Old 12-07-2007, 07:43 PM   #9
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Almost sounds like a split second of dry run valve train time, till the oil gets there..

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Old 12-07-2007, 11:31 PM   #10
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VVT reset/adjustment?
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