loud rattle on startup

kolosy · 12-13-2022, 08:13 PM

almost had a heart attack.. went to start it after sitting for about 24 hours.. started and immediately made a loud rattling noise.. almost like if you've ever accidentally tried to start an already-started car. lasted a second at most, short enough where i didn't even get a chance to shut it off. sounded perfectly fine afterwards, no lights, no issues, and started right up a second time.

read something about possible rattling timing chain tensioners? could it be the starter not disengaging? other ideas?

kolosy · 12-13-2022, 10:18 PM

actually pretty similar to the S63 sound in this thread -> https://www.m3post.com/forums/showthread.php?t=1097642

... so ... normal? never heard this on my E93, or my E92 until today.

///M Power-Belgium · 12-14-2022, 05:03 AM

Quote:

Originally Posted by kolosy

actually pretty similar to the S63 sound in this thread -> https://www.m3post.com/forums/showthread.php?t=1097642

... so ... normal? never heard this on my E93, or my E92 until today.

Everything you need to know ...=> https://www.m3post.com/forums/showthread.php?t=996069

amrazM · 12-14-2022, 05:12 AM

the adjusters rattle after sitting a while. its not abnormal, once oil pressure builds its good.

///M Power-Belgium · 12-14-2022, 06:19 AM

Quote:

Originally Posted by amrazM

the adjusters rattle after sitting a while. its not abnormal, once oil pressure builds its good.

Negative . In '2012 it was a PUMA case and the rattle noise was fixed by replacing the Vanos Gears ..
Client reports at 'Irvine BMW a rattle noise on cold starts :

Ajolives · 12-14-2022, 08:29 AM

This is correct, big ticket item to blame.

I’ve had the noise off and on for the past 2 years. Anecdotally it depends on how much I drive it - got less frequent when I fixed all oil leaks and gaskets.

I remember coming across the thread from ///M Power-Belgium pasted and also saw speculation about the cam to adjuster gasket leaking, causing the noise.

I know deansbimmer sells refurbished units and may be my play when I rebuild this 165k engine after M539 does his so I know what to focus on 😂😂😂

kolosy · 12-14-2022, 09:23 AM

so the thread linked says there's no solution (unless i'm misreading it), you guys are saying I need new vanos gears, somewhere in that thread Malik says it's just the starter disengaging late, NBD...

sigh.

fwiw, didn't happen this morning, but the car only sat for 12 hours this time.

kolosy · 12-14-2022, 09:31 AM

ha. paranoid security cams to the rescue -- actually caught the noise on video it turns out. definitely sounds more starter related (and just as terrifying the second time around as the first). fun starts around 0:20

12-13-2022, 08:13 PM	#1
kolosy Colonel 1491 Rep 2,021 Posts Drives: over potholes Join Date: Dec 2008 Location: Chicago iTrader: (2)	loud rattle on startup almost had a heart attack.. went to start it after sitting for about 24 hours.. started and immediately made a loud rattling noise.. almost like if you've ever accidentally tried to start an already-started car. lasted a second at most, short enough where i didn't even get a chance to shut it off. sounded perfectly fine afterwards, no lights, no issues, and started right up a second time. read something about possible rattling timing chain tensioners? could it be the starter not disengaging? other ideas? __________________ Current '21 DG X5MC, '22 X5M50i, '11 E90 M3 Recent Past '12 E92 M3 ZCP, '08 E93 M3, '18 F80 ZCP, '04 E46 M3 I think I have an M3 problem. Last edited by kolosy; 12-13-2022 at 08:39 PM..
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12-13-2022, 10:18 PM	#2
kolosy Colonel 1491 Rep 2,021 Posts Drives: over potholes Join Date: Dec 2008 Location: Chicago iTrader: (2)	actually pretty similar to the S63 sound in this thread -> https://www.m3post.com/forums/showthread.php?t=1097642 ... so ... normal? never heard this on my E93, or my E92 until today. __________________ Current '21 DG X5MC, '22 X5M50i, '11 E90 M3 Recent Past '12 E92 M3 ZCP, '08 E93 M3, '18 F80 ZCP, '04 E46 M3 I think I have an M3 problem.
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12-14-2022, 05:12 AM	#4
amrazM mTekMods 2143 Rep 2,902 Posts Drives: like a granny. Join Date: Jan 2010 Location: Manhatan iTrader: (1)	the adjusters rattle after sitting a while. its not abnormal, once oil pressure builds its good. __________________ 2011 Frozen Black/Fox Red E90 M3 650+WHP G-Power Supercharged First DCT to Manual Conversion Worldwide KW CS, BBS RI-A, BW Headers, Snow 2.5
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12-14-2022, 08:29 AM	#6
Ajolives Captain 922 Rep 933 Posts Drives: E90 M3 Join Date: Mar 2019 Location: Tampa iTrader: (0) Garage List 2019 Audi SQ5 [0.00] 2008 BMW M3 [0.00]	This is correct, big ticket item to blame. I’ve had the noise off and on for the past 2 years. Anecdotally it depends on how much I drive it - got less frequent when I fixed all oil leaks and gaskets. I remember coming across the thread from ///M Power-Belgium pasted and also saw speculation about the cam to adjuster gasket leaking, causing the noise. I know deansbimmer sells refurbished units and may be my play when I rebuild this 165k engine after M539 does his so I know what to focus on 😂😂😂
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12-14-2022, 09:23 AM	#7
kolosy Colonel 1491 Rep 2,021 Posts Drives: over potholes Join Date: Dec 2008 Location: Chicago iTrader: (2)	so the thread linked says there's no solution (unless i'm misreading it), you guys are saying I need new vanos gears, somewhere in that thread Malik says it's just the starter disengaging late, NBD... sigh. fwiw, didn't happen this morning, but the car only sat for 12 hours this time. __________________ Current '21 DG X5MC, '22 X5M50i, '11 E90 M3 Recent Past '12 E92 M3 ZCP, '08 E93 M3, '18 F80 ZCP, '04 E46 M3 I think I have an M3 problem.
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12-14-2022, 09:31 AM	#8
kolosy Colonel 1491 Rep 2,021 Posts Drives: over potholes Join Date: Dec 2008 Location: Chicago iTrader: (2)	ha. paranoid security cams to the rescue -- actually caught the noise on video it turns out. definitely sounds more starter related (and just as terrifying the second time around as the first). fun starts around 0:20 __________________ Current '21 DG X5MC, '22 X5M50i, '11 E90 M3 Recent Past '12 E92 M3 ZCP, '08 E93 M3, '18 F80 ZCP, '04 E46 M3 I think I have an M3 problem.
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