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View Full Version : 2015 3.0T Timing Chain Rattle (semi warm start)



itsapoolday
12-22-2023, 06:34 AM
Hi all,

I’ve got a 2015 S4 with 51k mi currently, bought at 36k mi. I get the timing chain rattle about 1/3 cold starts in the morning, but none last longer than a second so I’m not worried there for now.

The concerning part is I’ve noticed sometimes I’ll get the same timing chain rattle on start when the engine was previously running 30min - 1 hour beforehand. Granted it’s not every time, but I’d say 20% of the time. Is this cause for concern for in the next 30,000 miles or so? I would appreciate any insight on this as I’ve seen countless threads on the dreaded startup rattle, but not any on a semi-warm engine (apologies if I missed any previous posts on that). Thank you!

hahnmgh63
12-22-2023, 11:40 PM
There is a TSB for engine rattling when cold. Audi did update the upper chain tensioners but of course said the rattling doesn't lead to engine damage as then they would be accepting liability.
15 Engine rattling noises at cold start - V6 3.0 TFSI
15 16 28 2039995/2 April 27, 2016. Supersedes Technical Service Bulletin Group 15 number 15-26 dated March 3, 2015 for reasons listed below.

Search Audi TSB 2039995/2

Yea, 51k is low miles to be having that problem. I've got 73k on my '13 and crossing my fingers as no issues with mine or the wifes '15 Q5 3.0t with 49k.