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06-30-2020, 09:28 PM
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#1 |
 
Drives: 2011 Camaro SS w/2SS Join Date: Mar 2020
Location: KY
Posts: 60
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I believe I am screwed...
So I changed the differential fluid the other day & took the car out for an easy drive. Drove slow & easy to listen to the rear end. As I was putting the car back in the garage I heard a rattle... I thought it was coming from under the car.
I put it up on ramps & crawled under to listen. It sounds like gravel rolling around at the back of the engine. I have ran through a list of what I am thinking it could be... Flywheel, Converter crapped out & catalyst knocking around in the can, and of course the dreaded lifter crap out... I wish I was more familiar with the site. I have a video of the it & would upload it if I knew how. It is an MP4 file. At first I thought it was a spun rod bearing... But it is not squealing at all. And it sounds like it is at the rear of the engine. The sound almost sounds like it is coming from the cat so I guess it could be a crapped out cat. However, lifters also resonate through the exhaust... SO, I am dreading the results. Gonna start by pulling the cat off tomorrow. It is on the driver's side & that is the easiest (And most hopeful) place to start. I swear it sounds JUST LIKE gravel between the engine & 6 speed trans... Anyway, any advice is appreciated as always. Anyone know what I should expect price wise if it is a lifter dead?? I know I will need a cam if it is a lifter & may as well replace it being that deep in... |
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06-30-2020, 09:29 PM
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#2 |
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Drives: 2011 Camaro SS w/2SS Join Date: Mar 2020
Location: KY
Posts: 60
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Is there any way to get a look at the flywheel w/o pulling the trans???
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06-30-2020, 10:00 PM
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#3 |
 
Drives: 2013 Camaro 2SS AGM Join Date: Apr 2020
Location: WNY
Posts: 733
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Something tells me you already had a noise.
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06-30-2020, 10:07 PM
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#4 |
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Drives: 2013 Camaro 2SS AGM Join Date: Apr 2020
Location: WNY
Posts: 733
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I don't see that happening from a fluid change.
Last edited by acutron42; 06-30-2020 at 10:21 PM. |
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06-30-2020, 10:12 PM
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#5 |
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Drives: 2013 Camaro 2SS AGM Join Date: Apr 2020
Location: WNY
Posts: 733
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Or could be the transmission. Why only drive "slow & easy" on a fluid change in the diff.
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06-30-2020, 10:57 PM
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#6 |
         
Drives: 2010 CGM 2SS/RS LS3 Swapped A6 Join Date: Sep 2016
Location: Spring Hill, FL
Posts: 4,575
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You can upload it to Youtube and then post the link here. It will auto embed the video into your post.
__________________
2010 CGM Camaro 2SS LS3 Swapped A6 - GPI LS3 SS1 .647/.638, (224/237, 112 +4, 7º overlap) on CamMotion 8620 core, BTR Platinum .660" Dual Spring kit w/titanium retainers, CHE bronze trunnion upgrade, stock heads milled @ .015, Melling HV 10296 oil pump, TSP 1-7/8" long tube headers (W/Catless Off-road Pipes), Corsa Xtreme 3" Catback, GPI Ported/Rod Mod Intake, Stage 2 Ported Throttle Body, Vararam OTR CAI, Mike Norris Gen 2 catch can + GM 1LE clean side separator, 160º thermostat - Megan Racing adjustable coilovers (lowered 1.75"), MRR M017 10/11" wheels-Tuned by Ryan @ GPI
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07-01-2020, 03:45 AM
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#7 | |
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Drives: 2011 Camaro SS w/2SS Join Date: Mar 2020
Location: KY
Posts: 60
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Quote:
No there was no noise before I took it out that day... |
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07-01-2020, 03:47 AM
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#8 | |
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Drives: 2011 Camaro SS w/2SS Join Date: Mar 2020
Location: KY
Posts: 60
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Quote:
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07-01-2020, 03:48 AM
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#9 | |
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Drives: 2011 Camaro SS w/2SS Join Date: Mar 2020
Location: KY
Posts: 60
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Quote:
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07-01-2020, 03:49 AM
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#10 | |
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Drives: 2011 Camaro SS w/2SS Join Date: Mar 2020
Location: KY
Posts: 60
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Quote:
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07-01-2020, 08:23 AM
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#11 |
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Drives: 2013 1ss Join Date: Jul 2012
Location: WI.
Posts: 520
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It may help to isolate when the noise is happening.
Moving or not In neutral or gear Clutch in or out ...etc. Different situations point to different parts. Also, I have used a cheap borscope thru the vent hole and slave cylinder hole to inspect the clutch system with success. |
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07-01-2020, 12:33 PM
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#12 | |
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Drives: 2011 Camaro SS w/2SS Join Date: Mar 2020
Location: KY
Posts: 60
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Quote:
Thanks for the boroscope vent hole/slave cylinder idea. ** Gonna pull valve cover today just to make sure it is not a rocker arm. It really does not sound to be coming from that high up, but I need to check. If I can get a hold of a boroscope today I will try to get a look at the flywheel as well. Thanks for the input. |
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07-01-2020, 02:51 PM
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#13 |
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Drives: 2011 Camaro SS w/2SS Join Date: Mar 2020
Location: KY
Posts: 60
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Ok so I pulled the valve covers & no rocker arm or spring issues... Gonna keep looking as time allows this week & will update as I go & have time....
Thanks to those who have offered legit advice, knowledge, & input. |
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07-01-2020, 06:40 PM
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#14 | |
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Drives: 2011 Camaro SS w/2SS Join Date: Mar 2020
Location: KY
Posts: 60
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OK, so I think I found my "Knock"
Driver's side top cat is apparently broken... Explains it sounding like gravel & no squealing... Will be taking it apart tomorrow & getting the old catalyst material out. Once I have the bad stuff out I will put it back on & run it to make sure that is indeed my source. I will not replace the cat because I am going to headers w/o cats in the next wk or so... I will update the thread once I get it running again!! Thanks to everyone who offered legit input. |
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