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Engine knocking

Old Mar 28, 2023 | 02:27 PM
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Default Engine knocking and oil leak

I have a 2016 c7 z06 that has an oil leak. Approximately 3000 miles ago I had the front and rear main seals replaced at a Chevy dealership. The car is still leaking oil but when I took the car to another dealership they weren't able to find the source of the oil leak. They also said that they heard a knocking noise about halfway down in cylinder number 7. The knocking noise goes away after idling for a few minutes. I've attached a video of the knocking noise. Any words of wisdom or advice is appreciated.
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Untitled.mov (4.54 MB, 67 views)

Last edited by Wbstead; Mar 31, 2023 at 11:31 AM. Reason: To give a more detailed description of the issue
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Old Mar 28, 2023 | 05:22 PM
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if you here this noise mainly under the car, it sounds to me like a flex plate rattle. Just my .02 cents.
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Old Mar 28, 2023 | 05:39 PM
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I was wondering/thinking if they got the torque tube reinstalled correctly too. OP, how many miles on the car and is it an A8 or M7 - I can't tell from the bell housing.

I would think a catastrophic knock from the crank or a rod would result in a loss of oil pressure.
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Old Mar 28, 2023 | 07:03 PM
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Originally Posted by Flattman
I was wondering/thinking if they got the torque tube reinstalled correctly too. OP, how many miles on the car and is it an A8 or M7 - I can't tell from the bell housing.

I would think a catastrophic knock from the crank or a rod would result in a loss of oil pressure.
The car has 39K miles and it's a A8.
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Old Mar 30, 2023 | 10:57 AM
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If they didn't re-install the torque correctly it will eventually wipe out the rear main bearing or torque tube bearing assy.
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Old Mar 30, 2023 | 02:02 PM
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Your car is leaking with 39k miles on it? That's odd..
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