What is this? Knocking Popping Tapping noise from the engine bay no codes - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

arren123 · 01-01-2018, 03:39 AM

I just started getting a loud tapping/popping noise in the engine bay. I have no ECU codes.
Could this be just the pulley gone bad? I know the pulley tensioner slaps around quite a bit.

I have a JRSC with stock internals/pulleys etc..

Spinning the idler pulley by hand. It seems to stop abruptly compared to the other pulleys I spin

Another video of the noise

guybo · 01-01-2018, 06:38 AM

Doesn't sound like a pulley to me. Listen with a rubber hose and isolate where the noise is coming from

arren123 · 01-01-2018, 11:12 AM

Sounds like its in the vicinity of the passenger side around Cylinder #1 or #3, but sounds louder when I'm closer to #3.
Was listening to rod knock videos, and I think it sounds similar.

humfrz · 01-01-2018, 03:16 PM

Oh, my, .......I'm not sure what is making that tapping/knocking sound ...... but, it can't be good .......

humfrz

Ultramaroon · 01-01-2018, 04:12 PM

Sounds like valve noise. Time to tear into it.

arren123 · 01-01-2018, 07:13 PM

I'm going to bring it to the stealership for a diagnostic. Unfortunately I don't have the time to take it apart.

Hoping that it isn't rod knock and is easier/less expensive to fix. Bracing for the worst though.

guybo · 01-02-2018, 06:19 AM

Quote:

Originally Posted by Ultramaroon

Sounds like valve noise. Time to tear into it.

I didn't want to be the first one to say this... not from a video on the internet. But his response to my post is not awesome.

Ultramaroon · 01-02-2018, 02:16 PM

Quote:

Originally Posted by guybo

I didn't want to be the first one to say this... not from a video on the internet. But his response to my post is not awesome.

Right? We've heard enough of them by now.

"Trust your instincts, Luke."

N1rve · 01-03-2018, 12:28 AM

Sounds like valve or rocker arms.

humfrz · 01-03-2018, 12:51 AM

Quote:

Originally Posted by N1rve

Sounds like valve or rocker arms.

Ya, it does sound a little light for a rod knocking.

Back in the day I would have called that sound a tappet out adjustment or a stuck hydraulic lifter …….. but, we aren’t back in the day ……

humfrz

arren123 · 01-03-2018, 10:40 AM

Humfrz,

Give a listen to this one and let me know what you think. It's from a cold start the next day. It is pretty loud when I move to the passenger side.

Tcoat · 01-03-2018, 10:47 AM

Manual or auto?

arren123 · 01-03-2018, 12:35 PM

Quote:

Originally Posted by Tcoat

Manual or auto?

Manual Limited

Does not make a difference if I have the clutch pedal pressed down or up.

Tcoat · 01-03-2018, 12:39 PM

Quote:

Originally Posted by arren123

Manual Limited

Does not make a difference if I have the clutch pedal pressed down or up.

If it was an auto the answer would have been simple but it doesn't apply to the manual.
http://www.ft86club.com/forums/showthread.php?t=107577
I am in the crowd that thinks it sound a little light for rod knock but unfortunately don't have any other answer.

01-01-2018, 04:12 PM	#5
Ultramaroon not playing cards Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 32,395 Thanks: 53,053 Thanked 37,228 Times in 19,308 Posts Mentioned: 1117 Post(s) Tagged: 9 Thread(s)	Sounds like valve noise. Time to tear into it. __________________ service manuals

01-03-2018, 12:28 AM	#9
N1rve Senior Member Join Date: Oct 2013 Drives: 2019 BMW ///M4 Location: Los Angeles, CA Posts: 2,332 Thanks: 102 Thanked 1,167 Times in 714 Posts Mentioned: 28 Post(s) Tagged: 0 Thread(s)	Sounds like valve or rocker arms. __________________ N1rve 2019 BMW ///M4 - Alpine White \| Sakhir Orange/Black Leather \| M-DCT \| Executive Package \| 19" Black 437M Wheels \| Carbon Fiber Trim \| Sunroof \| Active Blind Spot \| Heated Steering Wheel \| Adaptive M Suspension

01-03-2018, 10:47 AM	#12
Tcoat Senior Member Join Date: Jul 2014 Drives: 2020 Hakone Location: London, Ont Posts: 69,841 Thanks: 61,656 Thanked 108,295 Times in 46,456 Posts Mentioned: 2499 Post(s) Tagged: 50 Thread(s)	Manual or auto? __________________ Racecar spelled backwards is Racecar, because Racecar.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
DIY - Fix your Rear Deck "popping/clicking/tapping/ticking" noise.	Mikepage	DIY (Do-It-Yourself) Guides	54	10-21-2020 03:34 PM
Rear Deck "popping/clicking/tapping/ticking" noise.	Sigh-on-Rice	Issues \| Warranty \| Recalls / TSB	637	04-28-2020 05:55 AM
SOLVED: Is this 2013 Scion FRS Engine Knocking/Tapping normal?	N1rve	Issues \| Warranty \| Recalls / TSB	215	08-24-2019 03:04 PM
Tapping/Knocking Sound from Front Coilovers	Trefoil	Suspension \| Chassis \| Brakes -- Sponsored by 949 Racing	1	06-19-2017 11:25 PM
Popping noise from engine bay during start up, free rev, light roll on throttle	heeltoe86	Tracking / Autocross / HPDE / Drifting	44	12-01-2014 10:28 PM

01-01-2018, 03:39 AM	#1
arren123 Member Join Date: Jul 2013 Drives: 2013 BRZ (RIP), now 2017 BRZ Location: Northern Delaware Posts: 49 Thanks: 10 Thanked 14 Times in 10 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	What is this? Knocking Popping Tapping noise from the engine bay no codes I just started getting a loud tapping/popping noise in the engine bay. I have no ECU codes. Could this be just the pulley gone bad? I know the pulley tensioner slaps around quite a bit. I have a JRSC with stock internals/pulleys etc.. Spinning the idler pulley by hand. It seems to stop abruptly compared to the other pulleys I spin Another video of the noise Last edited by arren123; 01-01-2018 at 04:09 AM.

01-01-2018, 06:38 AM	#2
guybo Huge E85 fan! Join Date: May 2016 Drives: 2016 Scion FRS Location: Tampa, FL, USA Posts: 1,850 Thanks: 539 Thanked 1,010 Times in 605 Posts Mentioned: 32 Post(s) Tagged: 0 Thread(s)	Doesn't sound like a pulley to me. Listen with a rubber hose and isolate where the noise is coming from

01-01-2018, 11:12 AM	#3
arren123 Member Join Date: Jul 2013 Drives: 2013 BRZ (RIP), now 2017 BRZ Location: Northern Delaware Posts: 49 Thanks: 10 Thanked 14 Times in 10 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Sounds like its in the vicinity of the passenger side around Cylinder #1 or #3, but sounds louder when I'm closer to #3. Was listening to rod knock videos, and I think it sounds similar.

01-01-2018, 03:16 PM	#4
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 30,432 Thanks: 29,826 Thanked 32,845 Times in 16,844 Posts Mentioned: 715 Post(s) Tagged: 2 Thread(s)	Oh, my, .......I'm not sure what is making that tapping/knocking sound ...... but, it can't be good ....... humfrz

01-01-2018, 07:13 PM	#6
arren123 Member Join Date: Jul 2013 Drives: 2013 BRZ (RIP), now 2017 BRZ Location: Northern Delaware Posts: 49 Thanks: 10 Thanked 14 Times in 10 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I'm going to bring it to the stealership for a diagnostic. Unfortunately I don't have the time to take it apart. Hoping that it isn't rod knock and is easier/less expensive to fix. Bracing for the worst though.

01-03-2018, 10:40 AM	#11
arren123 Member Join Date: Jul 2013 Drives: 2013 BRZ (RIP), now 2017 BRZ Location: Northern Delaware Posts: 49 Thanks: 10 Thanked 14 Times in 10 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Humfrz, Give a listen to this one and let me know what you think. It's from a cold start the next day. It is pretty loud when I move to the passenger side.

User Name		Remember Me?
Password