Engine bay sounds like a box of rocks - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

acammer · 11-13-2023, 07:50 AM

Unfortunately without a video of it running, it's pretty tough to go on written descriptions of the sound and make any kind of diagnosis. I like pulling the accessory belt as a quick/easy step to roll in/out anything in the accessory drive. It's also not too much work to pull the valve-covers and make a quick inspection for spring/rocker issues. From there, the diagnostics get a little more involved.

Let us know what you find.

ss camaro-monte · 11-13-2023, 04:51 PM

Took off the serpentine belt to see if it was anything with the tensioner or maybe pulley but it still does it. Going to take it in tomorrow to a local shop and see what they say.

ss camaro-monte · 11-13-2023, 06:10 PM

Here is a short video. Again, sounds like a box of rocks. Motor has very high oil pressure at start up. Like 60-70. Doesn't have low oil pressure but GPI put a high volume Melling pump on it when the motor was worked on. It starts up strong. I am wondering, could it be a flexplate? Just another idea.

https://youtube.com/shorts/PqVYByFzE8s

SlowLS1 · 11-13-2023, 06:45 PM

Quote:

Originally Posted by ss camaro-monte

Here is a short video. Again, sounds like a box of rocks. Motor has very high oil pressure at start up. Like 60-70. Doesn't have low oil pressure but GPI put a high volume Melling pump on it when the motor was worked on. It starts up strong. I am wondering, could it be a flexplate? Just another idea.

https://youtube.com/shorts/PqVYByFzE8s

Video is marked private.

ss camaro-monte · 11-13-2023, 06:48 PM

Sorry, try it now. Made it public.

SlowLS1 · 11-13-2023, 06:52 PM

Quote:

Originally Posted by ss camaro-monte

Sorry, try it now. Made it public.

I would pull the starter and check the flex plate / TQ bolts. That doesn't sound like an internal issue to me.

Maybe consider pulling the belts off and run it to see if might be isolated to a driven accessory.

1JEWLDSSRS · 11-13-2023, 08:05 PM

Quote:

Originally Posted by SlowLS1

I would pull the starter and check the flex plate / TQ bolts. That doesn't sound like an internal issue to me.

Maybe consider pulling the belts off and run it to see if might be isolated to a driven accessory.

I think he said he did that already. Sounds to me kind of like somethink hitting the frame underneath the car maybe? Like a header tube hitting the brace as the engine shakes as they do, or quite possibly a flex plate bolt lose as mentioned. I'd check under the car while it is running..

ss camaro-monte · 11-13-2023, 08:18 PM

The shop I use locally can't get to it until the 29th.lol
They are booked solid this week and not open most of next week understandably.
I will try and put it up on ramps one day this week after work and see if I can see anything.
I got to get that serpentine belt back on first and then I will get underneath.

I am going to guess and say torque converter bolts or flexplate. But that is just a guess obviously.

joshnmn · 11-13-2023, 09:09 PM

Yikes. Sounds expensive to me

SlowLS1 · 11-14-2023, 06:40 AM

Quote:

Originally Posted by 1JEWLDSSRS

I think he said he did that already. Sounds to me kind of like somethink hitting the frame underneath the car maybe? Like a header tube hitting the brace as the engine shakes as they do, or quite possibly a flex plate bolt lose as mentioned. I'd check under the car while it is running..

I missed that, my bad!

Infidel67 · 11-14-2023, 08:32 AM

Yikes Brother, I hope you get it solved asap

I wouldn't drive it or crank it, but that's just me.

acammer · 11-14-2023, 09:14 AM

Quote:

Originally Posted by SlowLS1

I would pull the starter and check the flex plate / TQ bolts. That doesn't sound like an internal issue to me.

Maybe consider pulling the belts off and run it to see if might be isolated to a driven accessory.

Bingo - I agree this sounds like it could be a loose flywheel/flex-plate. Does it change at all when you plunk it in gear?

ss camaro-monte · 11-14-2023, 02:55 PM

Andrew, just did what you said and as soon as I put it in gear the motor died. Put it back in park, started it again and started right up. I think it is going to be the flexplate or torque convertor. Going to give Circle D a call since they are 15 minutes away from me. I will take it to them first.

ss camaro-monte · 11-14-2023, 04:25 PM

Car is at circle d. First time I restarted it I didn't notice a noise in gear but now it makes a grinding noise and stalls right away once I put it into gear. Car starts right back up though.They will start to look at it tomorrow. Hopefully it is just converter bolts or flexplate. I will update when I know more. Thanks

11-13-2023, 07:50 AM	#15
acammer GPI Sales Consultant Drives: 2011 Camaro 2SS SGM Join Date: Jul 2016 Location: Weedsport, NY Posts: 2,989 View My Garage	Unfortunately without a video of it running, it's pretty tough to go on written descriptions of the sound and make any kind of diagnosis. I like pulling the accessory belt as a quick/easy step to roll in/out anything in the accessory drive. It's also not too much work to pull the valve-covers and make a quick inspection for spring/rocker issues. From there, the diagnostics get a little more involved. Let us know what you find. __________________ GPI Max Package 2.0: Brodix BR7 heads/GPI porting, MAX3 cam, ST2116LSR, BSR Max Lift rockers, LS7 LSXR with 103mm TB, Vararam OTR, Mcleod RXT, G-Force/Strange 9" IRS setup with 4.63 gear. 551whp, 11.1@124mph. *Got a question about a GPI product? Feel free to shoot me a message!*

11-13-2023, 06:10 PM	#17
ss camaro-monte Drives: 2015 camaro 2ss, 87 monte ss Join Date: Jun 2016 Location: Houston Posts: 304	Here is a short video. Again, sounds like a box of rocks. Motor has very high oil pressure at start up. Like 60-70. Doesn't have low oil pressure but GPI put a high volume Melling pump on it when the motor was worked on. It starts up strong. I am wondering, could it be a flexplate? Just another idea. https://youtube.com/shorts/PqVYByFzE8s Last edited by ss camaro-monte; 11-13-2023 at 06:23 PM.

11-14-2023, 08:32 AM	#25
Infidel67 Life's just a Ride Drives: 2011 Synergy Camaro 2SS/RS LS3 Join Date: Oct 2013 Location: Columbia SC Posts: 884 View My Garage	Yikes Brother, I hope you get it solved asap I wouldn't drive it or crank it, but that's just me. __________________ 2011 Synergy Camaro 2SS/RS Ls3, LTH, CAI Custom Intake, TSP stage-3 111-LSA Cam, RWHP 503/508

11-13-2023, 04:51 PM	#16
ss camaro-monte Drives: 2015 camaro 2ss, 87 monte ss Join Date: Jun 2016 Location: Houston Posts: 304	Took off the serpentine belt to see if it was anything with the tensioner or maybe pulley but it still does it. Going to take it in tomorrow to a local shop and see what they say.

11-13-2023, 06:48 PM	#19
ss camaro-monte Drives: 2015 camaro 2ss, 87 monte ss Join Date: Jun 2016 Location: Houston Posts: 304	Sorry, try it now. Made it public.

11-13-2023, 08:18 PM	#22
ss camaro-monte Drives: 2015 camaro 2ss, 87 monte ss Join Date: Jun 2016 Location: Houston Posts: 304	The shop I use locally can't get to it until the 29th.lol They are booked solid this week and not open most of next week understandably. I will try and put it up on ramps one day this week after work and see if I can see anything. I got to get that serpentine belt back on first and then I will get underneath. I am going to guess and say torque converter bolts or flexplate. But that is just a guess obviously.

11-13-2023, 09:09 PM	#23
joshnmn 2&THEHIT Drives: 5th Gen Camaro; 5th Gen Ram 3500 Join Date: Mar 2018 Location: Garner, NC Posts: 1,102 View My Garage	Yikes. Sounds expensive to me

11-14-2023, 02:55 PM	#27
ss camaro-monte Drives: 2015 camaro 2ss, 87 monte ss Join Date: Jun 2016 Location: Houston Posts: 304	Andrew, just did what you said and as soon as I put it in gear the motor died. Put it back in park, started it again and started right up. I think it is going to be the flexplate or torque convertor. Going to give Circle D a call since they are 15 minutes away from me. I will take it to them first.

11-14-2023, 04:25 PM	#28
ss camaro-monte Drives: 2015 camaro 2ss, 87 monte ss Join Date: Jun 2016 Location: Houston Posts: 304	Car is at circle d. First time I restarted it I didn't notice a noise in gear but now it makes a grinding noise and stalls right away once I put it into gear. Car starts right back up though.They will start to look at it tomorrow. Hopefully it is just converter bolts or flexplate. I will update when I know more. Thanks