Motor ticking sound under hard acceleration

DL335D · 01-03-2021, 08:08 PM

This is driving me nuts. 2 new noises in 2 days! That has to be some kind of record.

Around 3,300 until 3,800 my engine makes a strange ticking/grinding sound (no check engine light). Notice how it goes away and smooths out after 3,800 and all you hear is that wonderful induction noise.

Any ideas? Vanos?

Bubbles · 01-03-2021, 08:24 PM

Quote:

Originally Posted by DL335D

This is driving me nuts. 2 new noises in 2 days! That has to be some kind of record.

Around 3,300 until 3,800 my engine makes a strange ticking/grinding sound (no check engine light). Notice how it goes away and smooths out after 3,800 and all you hear is that wonderful induction sound.

Any ideas? Vanos?

Worn motor mounts or exhaust may have a backed out bolt or something is rubbing on the heat shield. Get it on a lift to check.

Gossypiboma · 01-03-2021, 08:52 PM

I dont hear anything abnormal.

Scrippy · 01-03-2021, 09:08 PM

Nothing wrong, what car did you have before this?

DL335D · 01-03-2021, 09:29 PM

Quote:

Originally Posted by Bubbles

Quote:

Originally Posted by DL335D

This is driving me nuts. 2 new noises in 2 days! That has to be some kind of record.

Around 3,300 until 3,800 my engine makes a strange ticking/grinding sound (no check engine light). Notice how it goes away and smooths out after 3,800 and all you hear is that wonderful induction sound.

Any ideas? Vanos?

Worn motor mounts or exhaust may have a backed out bolt or something is rubbing on the heat shield. Get it on a lift to check.

Car has new motor mounts. I'll check the exhaust tomorrow.

Quote:

Originally Posted by Scrippy

Nothing wrong, what car did you have before this?

2018 F80 ZCP and before that 440 Gran coupe. I've had quite a few NA cars. E39 540, 350Z, fJ80 Land Cruiser, Spec Miata and prob over 30 others. Yeah...I know...I have a serious car obsession.

DL335D · 01-03-2021, 09:31 PM

Quote:

Originally Posted by Gossypiboma

I dont hear anything abnormal.

Didn't sound anything like it did today the last time I drove it. Not sure if this matters, but I burn almost 2-3 bottles of oil every 5k. Not a single engine leak found.

wootloops · 01-03-2021, 10:30 PM

I kind of hear it. It does just sound like maybe something rattling on the outside of the engine. Maybe a heat shield or something as others have stated.

Helmsman · 01-04-2021, 08:21 AM

Always tricky to hear reality in videos, same thing here, can't hear anything really even when trying hard.

DL335D · 01-04-2021, 12:11 PM

^ I know. I can really hear it on my iPhone 12 with the volume cranked up, but can't hear it on my wife's iPhone 8.

I'll record a 3rd gear pull where the engine noise is a lot more pronounced.

Scrippy · 01-04-2021, 01:53 PM

Quote:

Originally Posted by DL335D

Quote:

Originally Posted by Bubbles

Quote:

Originally Posted by DL335D

This is driving me nuts. 2 new noises in 2 days! That has to be some kind of record.

Around 3,300 until 3,800 my engine makes a strange ticking/grinding sound (no check engine light). Notice how it goes away and smooths out after 3,800 and all you hear is that wonderful induction sound.

Any ideas? Vanos?

Worn motor mounts or exhaust may have a backed out bolt or something is rubbing on the heat shield. Get it on a lift to check.

Car has new motor mounts. I'll check the exhaust tomorrow.

Quote:

Originally Posted by Scrippy

Nothing wrong, what car did you have before this?

2018 F80 ZCP and before that 440 Gran coupe. I've had quite a few NA cars. E39 540, 350Z, fJ80 Land Cruiser, Spec Miata and prob over 30 others. Yeah...I know...I have a serious car obsession.

The reason I asked what car you had before was due to the S65 characteristics of noise. I came from a 335 and I thought my M3 had an exhaust leak as well as noisy valves because I was used to the much smoother N54. I was shocked how rough the S65 sounds but as I became more familiar as well as heard other M3's, I realized this motor is just a noisy fucking sewing machine but I still love it!

white_4door · 01-05-2021, 05:11 AM

i replaced the crankcase non return valve on the back of driver side block and the breathers on the valve covers to intake manifold and went from 1 liter every 700 miles to 1 liter every 4k. also agree with checking the engine mounts

Helmsman · 01-05-2021, 09:09 AM

Quote:

Originally Posted by DL335D

^ I know. I can really hear it on my iPhone 12 with the volume cranked up, but can't hear it on my wife's iPhone 8.

I'll record a 3rd gear pull where the engine noise is a lot more pronounced.

I knew it, I have to replace my good old Samsung!

JBird.. · 01-05-2021, 10:50 AM

I had a very similar rattle after installing new cabin filters and intake filter. I would check that all those screws are fully torqued down and hopefully that helps! I know it's a simple solution but I had the exact same issue.

DL335D · 01-05-2021, 12:58 PM

Quote:

Originally Posted by jzizzl

I had a very similar rattle after installing new cabin filters and intake filter. I would check that all those screws are fully torqued down and hopefully that helps! I know it's a simple solution but I had the exact same issue.

I'll check that too. My motor mounts were just replaced. I wonder if the mechanics messed something up as the noise started on my ride home from their shop.

JBird.. · 01-12-2021, 02:54 PM

Any updates here DL335D? Hopefully it all got sorted!

DL335D · 01-12-2021, 05:10 PM

^I'm taking her in for her first oils change tomorrow. I'm going to go on a ride along with the mechanic. I'll keep you posted.

Eja144 · 01-12-2021, 07:21 PM

My money's on a bad exhaust gasket. Seems like a fairly common failure point. I've blown through 2 already - the original driver's side and its brand new replacement only a few weeks later. Had a similar rattle/flutter sound from 2.5-5k under heavy throttle. They're cheap so I bought a couple extras from FCP Euro just in case.

DL335D · 01-13-2021, 10:21 AM

I bet that's it! I can hear a tiny rattle when I put my ear down to my exhaust tips.

Eja144 · 01-13-2021, 10:32 AM

Quote:

Originally Posted by DL335D

I bet that's it! I can hear a tiny rattle when I put my ear down to my exhaust tips.

I hope so! Super cheap fix if so. It drove me nuts for weeks before I figured it out. Had myself convinced my engine was gonna blow up, haha.

If you can get the car up on ramps and crawl under the side just behind the front tire, the gasket is located where the cats connect to the headers. When mine went bad I could hear a ticking coming from that general area.

Ajolives · 01-13-2021, 10:34 AM

Quote:

Originally Posted by Eja144

Quote:

Originally Posted by DL335D

I bet that's it! I can hear a tiny rattle when I put my ear down to my exhaust tips.

I hope so! Super cheap fix if so. It drove me nuts for weeks before I figured it out. Had myself convinced my engine was gonna blow up, haha.

If you can get the car up on ramps and crawl under the side just behind the front tire, the gasket is located where the cats connect to the headers. When mine went bad I could hear a ticking coming from that general area.

I've had the same sound, thought it was the baffling in the cats coming loose because it was localized in that area for me. Ended up being the gaskets.

kyrix1st · 01-13-2021, 11:29 AM

I have the same sound on my '07 6MT. 10,000km and three track days later, still sliding around rear end with PSS on mountain runs.

01-03-2021, 08:08 PM	#1
DL335D Captain 591 Rep 941 Posts Drives: 2013 e92 M3 Q4 Join Date: Apr 2014 Location: Boston iTrader: (2)	This is driving me nuts. 2 new noises in 2 days! That has to be some kind of record. Around 3,300 until 3,800 my engine makes a strange ticking/grinding sound (no check engine light). Notice how it goes away and smooths out after 3,800 and all you hear is that wonderful induction noise. Any ideas? Vanos? __________________ 2013 e92 M3 2011 X5 35d 2018 F80 M3 ZCP
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01-03-2021, 08:52 PM	#3
Gossypiboma Major 620 Rep 1,253 Posts Drives: 13' M3 6MT 18' M3 CS Join Date: Aug 2012 Location: The John iTrader: (9)	I dont hear anything abnormal.
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01-03-2021, 09:08 PM	#4
Scrippy Lord Scrip 2390 Rep 3,419 Posts Drives: 2011 M3 Coupe Join Date: Jan 2012 Location: LA,Ca iTrader: (0) Garage List [10.00] 2007 BMW 335i [10.00]	Nothing wrong, what car did you have before this? __________________
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01-03-2021, 10:30 PM	#7
wootloops First Lieutenant 377 Rep 365 Posts Drives: 2013 E92 M3 Lime Rock Park Join Date: Aug 2012 Location: Jupiter, Florida iTrader: (0)	I kind of hear it. It does just sound like maybe something rattling on the outside of the engine. Maybe a heat shield or something as others have stated.
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01-04-2021, 08:21 AM	#8
Helmsman Major General 5484 Rep 7,657 Posts Drives: 2011 AW E90 M3 ZCP Join Date: Mar 2014 Location: Stockholm, Sweden iTrader: (0)	Always tricky to hear reality in videos, same thing here, can't hear anything really even when trying hard.
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01-04-2021, 12:11 PM	#9
DL335D Captain 591 Rep 941 Posts Drives: 2013 e92 M3 Q4 Join Date: Apr 2014 Location: Boston iTrader: (2)	^ I know. I can really hear it on my iPhone 12 with the volume cranked up, but can't hear it on my wife's iPhone 8. I'll record a 3rd gear pull where the engine noise is a lot more pronounced. __________________ 2013 e92 M3 2011 X5 35d 2018 F80 M3 ZCP
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01-05-2021, 05:11 AM	#11
white_4door Private 24 Rep 66 Posts Drives: 11 alpine white e90 Join Date: Oct 2018 Location: phoenixville, pa iTrader: (1) Garage List 2001 bmw 540i [0.00] 2008 bmw 535i [0.00] 2008 bmw m3 [0.00] 2011 bmw m3 [0.00]	i replaced the crankcase non return valve on the back of driver side block and the breathers on the valve covers to intake manifold and went from 1 liter every 700 miles to 1 liter every 4k. also agree with checking the engine mounts Last edited by white_4door; 01-05-2021 at 05:12 AM.. Reason: forgot some info
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01-05-2021, 10:50 AM	#13
JBird.. Lieutenant 189 Rep 488 Posts Drives: 2009 E92 M3 Join Date: Sep 2013 Location: SF Bay Area // Carmel iTrader: (0)	I had a very similar rattle after installing new cabin filters and intake filter. I would check that all those screws are fully torqued down and hopefully that helps! I know it's a simple solution but I had the exact same issue.
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01-12-2021, 02:54 PM	#15
JBird.. Lieutenant 189 Rep 488 Posts Drives: 2009 E92 M3 Join Date: Sep 2013 Location: SF Bay Area // Carmel iTrader: (0)	Any updates here DL335D? Hopefully it all got sorted!
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01-12-2021, 05:10 PM	#16
DL335D Captain 591 Rep 941 Posts Drives: 2013 e92 M3 Q4 Join Date: Apr 2014 Location: Boston iTrader: (2)	^I'm taking her in for her first oils change tomorrow. I'm going to go on a ride along with the mechanic. I'll keep you posted. __________________ 2013 e92 M3 2011 X5 35d 2018 F80 M3 ZCP
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01-12-2021, 07:21 PM	#17
Eja144 First Lieutenant 320 Rep 308 Posts Drives: 2008 E90 M3 Join Date: Jun 2019 Location: Long Island, NY iTrader: (0)	My money's on a bad exhaust gasket. Seems like a fairly common failure point. I've blown through 2 already - the original driver's side and its brand new replacement only a few weeks later. Had a similar rattle/flutter sound from 2.5-5k under heavy throttle. They're cheap so I bought a couple extras from FCP Euro just in case.
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01-13-2021, 10:21 AM	#18
DL335D Captain 591 Rep 941 Posts Drives: 2013 e92 M3 Q4 Join Date: Apr 2014 Location: Boston iTrader: (2)	I bet that's it! I can hear a tiny rattle when I put my ear down to my exhaust tips. __________________ 2013 e92 M3 2011 X5 35d 2018 F80 M3 ZCP
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01-13-2021, 11:29 AM	#21
kyrix1st Colonel 2432 Rep 2,441 Posts Drives: '25 718 GTS 4.0; E92M3 MT&DCT Join Date: Sep 2014 Location: nyc iTrader: (0) Garage List 2004 BMW Z4 [0.00]	I have the same sound on my '07 6MT. 10,000km and three track days later, still sliding around rear end with PSS on mountain runs. __________________ Pass me if you can.
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