Hi,
If that is the engine cranking, you lost compression. It doesn't sound like there is any.
If the timing chain broke or jumped time, that is what can happen. To make matters worse, I believe all 328i vehicles with the 2.0L are interference engines.
What I need you to do is check engine compression.
Here is a link that explains how it's done:
https://www.2carpros.com/articles/how-to-test-engine-compression
You will need a compression gauge, but if you don't have one, most parts stores will lend one to you. Note: Compression should be between 100 psi and 150 psi with a maximum variation of 30 psi between cylinders. I have a feeling you are going to find 0 psi or extremely low compression. If that is the case, we will need to inspect the timing chain and timing.
Do this and let me know the results.
Take care,
Joe
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Friday, June 23rd, 2023 AT 9:25 PM