Z4M cold start tap

zed_fan · 07-10-2023, 01:58 PM

Hey guys. Looking for opinions on this cold start tapping I recently noticed though I'm not sure if it's always been like that. Occurs for roughly 30 seconds. I've gotten paranoid over engine noises now haha -- 500 miles ago I did some VANOS bulletproofing work since I had developed a low frequency knock on cold starts that was due to intake camshaft bolts shearing. Also did a valve adjustment and spark plugs at the same time. SO I'm not sure if this new noise is to blame on my work.

https://www.youtube.com/watch?v=AFYW5sFnTuk

What do you guys think? Normal or cause for concern?

grannyknot · 07-10-2023, 03:58 PM

To me, it sounds like a cold S54 warming up, both my S54's have sounded like that.

maupineda · 07-11-2023, 09:58 PM

sounds normal to me. the S54 is a noise and tapy engine

07-10-2023, 01:58 PM	#1
zed_fan Private 21 Rep 70 Posts Drives: 2006 Z4MR, E60 M5 6MT Join Date: Jul 2020 Location: AZ iTrader: (0)	Z4M cold start tap Hey guys. Looking for opinions on this cold start tapping I recently noticed though I'm not sure if it's always been like that. Occurs for roughly 30 seconds. I've gotten paranoid over engine noises now haha -- 500 miles ago I did some VANOS bulletproofing work since I had developed a low frequency knock on cold starts that was due to intake camshaft bolts shearing. Also did a valve adjustment and spark plugs at the same time. SO I'm not sure if this new noise is to blame on my work. https://www.youtube.com/watch?v=AFYW5sFnTuk What do you guys think? Normal or cause for concern?
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07-10-2023, 03:58 PM	#2
grannyknot Captain 952 Rep 781 Posts Drives: 2008 Z4M coupe Join Date: Oct 2021 Location: toronto iTrader: (0)	To me, it sounds like a cold S54 warming up, both my S54's have sounded like that. __________________ 2008 E86 M coupe
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07-11-2023, 09:58 PM	#3
maupineda Captain 456 Rep 975 Posts Drives: E86 Z4MC Join Date: Jul 2012 Location: Detroit, MI iTrader: (3)	sounds normal to me. the S54 is a noise and tapy engine
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