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BMW 3-Series (E90 E92) Forum
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N54 Rod knock?
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11-20-2022, 03:08 PM | #1 |
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Rep 1
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N54 Rod knock?
Hi guys just wanted to confirm my suspicions of rod knock on my 335i. Are there any other checks I can do to confirm? Car still drove fine and no fault codes etc
https://youtube.com/shorts/0caOSvLbyR8?feature=share Any help appreciated |
11-25-2022, 10:52 PM | #5 | |
First Lieutenant
192
Rep 382
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Quote:
OP, I noticed the AC compressor really knocks in intervals of 600-650rpm. Try holding 1200 and 1800 and see if it knocks more at those speeds but less in between, unsure how these motors are specifically but S65 rods like to knock the most in the 2500-3000 range. Sounded like yours was lower so I'd wager it's the AC compressor. |
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11-25-2022, 11:05 PM | #6 |
Brigadier General
1677
Rep 3,642
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It's always hard to tell for sure over the interwebs but that genuinely doesn't sound like a rod knock to me. Try removing the belt and running it for a minute--I bet it sounds fine.
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