Help Diagnose this Engine Noise

SoCalRPM · 05-19-2019, 11:37 AM

Just the other day I started hearing this metallic rattling sound coming from the engine bay. It only really shows up after the engine is near or up to full temp. No sign of the noise at startup/cold start. I don't really hear it out on the road, only when I pull back into the quiet garage. The sound doesn't seem to have any correlation to throttle input.

I think I've seen/heard similar videos with this issue. Perhaps the heat shield around the headers? If so, what's the remedy?

2011.5 e92 - DCT - ZCP - 62k

zenohua · 05-19-2019, 01:24 PM

Did you use Liqui Moly oil?

SoCalRPM · 05-19-2019, 02:10 PM

Quote:

Originally Posted by zenohua

Did you use Liqui Moly oil?

Yes - recent oil change

Scrippy · 05-19-2019, 05:03 PM

Normal tick that we all get eventually. One day someone is going to crack the code and figure out what this is. It's coming from the bottom of the motor. It is not a heat shield loose. For my car I hear it during the summer and all winter it's quiet.

Makaveli7 · 05-19-2019, 05:26 PM

check the driver side exhaust heat shield. ItsGary pointed out once that he had that loose.

SoCalRPM · 05-20-2019, 11:24 AM

Quote:

Originally Posted by Makaveli7

check the driver side exhaust heat shield. ItsGary pointed out once that he had that loose.

Thanks, is there an easy fix?

Mvy · 05-20-2019, 11:30 AM

Quote:

Originally Posted by SoCalRPM

Thanks, is there an easy fix?

If its the heat shield, you can lift the car up and bang on it with a mallet to get it out of the way, or use a dowel and a mallet if its hard to reach.

GORDON.M3 · 05-20-2019, 11:36 AM

Honestly might be my header exhaust heat shield also...
I have been dealing with this undiagnosed issue for the past 6 months and nothing is wrong with the car.. no codes nothing.

Shiza · 05-20-2019, 12:15 PM

Quote:

Originally Posted by GORDON.M3

Honestly might be my header exhaust heat shield also...
I have been dealing with this undiagnosed issue for the past 6 months and nothing is wrong with the car.. no codes nothing.

Yours absolutely sounds like a heat shield or your exhaust hitting something.

05-19-2019, 11:37 AM	#1
SoCalRPM Captain 886 Rep 942 Posts Drives: e92 M3 Join Date: May 2017 Location: LA iTrader: (0)	Help Diagnose this Engine Noise Just the other day I started hearing this metallic rattling sound coming from the engine bay. It only really shows up after the engine is near or up to full temp. No sign of the noise at startup/cold start. I don't really hear it out on the road, only when I pull back into the quiet garage. The sound doesn't seem to have any correlation to throttle input. I think I've seen/heard similar videos with this issue. Perhaps the heat shield around the headers? If so, what's the remedy? 2011.5 e92 - DCT - ZCP - 62k
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05-19-2019, 01:24 PM	#2
zenohua Private 112 Rep 51 Posts Drives: 09 E90 M3, 21 G80 M3 Join Date: Sep 2015 Location: Melbourne iTrader: (0)	Did you use Liqui Moly oil?
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05-19-2019, 05:03 PM	#4
Scrippy Lord Scrip 1812 Rep 3,012 Posts Drives: 2011 M3 Coupe Join Date: Jan 2012 Location: LA,Ca iTrader: (0) Garage List [0.00] 2007 BMW 335i [0.00]	Normal tick that we all get eventually. One day someone is going to crack the code and figure out what this is. It's coming from the bottom of the motor. It is not a heat shield loose. For my car I hear it during the summer and all winter it's quiet. __________________
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05-19-2019, 05:26 PM	#5
Makaveli7 Enthusiast 117 Rep 150 Posts Drives: M3 E92 Jerez Black Join Date: May 2012 Location: Dubai iTrader: (0)	check the driver side exhaust heat shield. ItsGary pointed out once that he had that loose. __________________ '08 JB E92 m3 // CCB Brakes // ESS 625 // https://www.instagram.com/makaveli777/
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05-20-2019, 11:36 AM	#8
GORDON.M3 Colonel 1414 Rep 2,996 Posts Drives: E92 M3 • F25 X3 M-Sport Join Date: Dec 2013 Location: LAX/YYZ/NRT iTrader: (11)	Honestly might be my header exhaust heat shield also... I have been dealing with this undiagnosed issue for the past 6 months and nothing is wrong with the car.. no codes nothing. __________________ INSTAGRAM: GORDON.M3 North American Mr12Volt Carplay/Android Auto Distributor DINAN \| EVOSPORT \| VAC \| ARP \| RD SPORT \| NEEZ \| EIBACH \| CSF \| IND \| BILSTEIN \| KLASSEN \| BREMBO \| ENDLESS \| BBS \| BPM SPORT \| PROJECT MU \| EVENTURI
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