Help with engine problem - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Jasper · 06-16-2016, 07:26 PM

Hi,
I'm quite concerned about my car at the moment. I was out with a buddy and gave it a couple of hard runs. I was talking at the time and accidentally hit the rev limiter not once, but twice. The second time, I heard a strange squeak/chain rattle sound coming from the front of the car. After further driving, I can repeat the sound even if I'm stationary with clutch in and simply rev to about 4K. I do not hear any noise during the rev or if accelerating until I let off the gas. As soon as i let off to shift, the rattle sound happens. I am able to hear it quite clear in the cabin. I have drivetrain warranty still but have been tuned. So I may have to revert to stock to take it in. I do not have any codes, the car drives normal and I don't hear the noise under light throttle. I have to be giving it a bit or reving upwards of 4K as mentioned.

Anybody have any clue what could rattle/squeak like that?

thanks,
J

Fit4Ink · 06-16-2016, 08:01 PM

If its a rattle noise I would pull the valve covers off and make sure you didn't snap a pushrod or damage a valve spring.

christianchevell · 06-17-2016, 07:10 AM

With the age of your engine , it could be belt slippage on the AC..... it could also be other things as well, and checking the top end is good, yet checking everything you can.....only you know where the sound came from and what it sounded like, heck could be clutch chatter, or could be the lousy ls3 chain tensioner just fell apart.... could be ?

Jasper · 06-17-2016, 07:13 AM

My buddy also mentioned the timing chain tensioner. He was figuring if it was a valve spring or rod, i'd be throwing a code. I'll see what he says tonight after hearing the noise. I'm glad i've still got powertrain warranty and will only have to pay my tuner to put the stock code back in temporarily before going for repair.

J

xc_SS/RS · 06-17-2016, 08:55 AM

Quote:

Originally Posted by Jasper

My buddy also mentioned the timing chain tensioner. He was figuring if it was a valve spring or rod, i'd be throwing a code. I'll see what he says tonight after hearing the noise. I'm glad i've still got powertrain warranty and will only have to pay my tuner to put the stock code back in temporarily before going for repair.

J

I had a valve spring break and no codes were thrown. I'd check the top end to be safe

caper · 06-17-2016, 09:11 AM

just a note - they can tell if its been tuned...sorry to say you dont have a warranty most likely.

JusticePete · 06-17-2016, 09:42 AM

Did the overkill Tune raise the limiter?

Jasper · 06-17-2016, 12:07 PM

Nope. The tune left the limiter alone. My warranty will be fine. I know the guys there really well.

I did a bit more driving today and isolated the sound to exactly 4Krpm. I can be coasting in neutral with clutch in and if I rev to right around 4K, it will squeak continually. Anything above or below 4K and it stops. So I'm hoping it's just an accessory pulley (maybe bearings).

J

HOJO · 06-17-2016, 06:10 PM

I really doubt you hurt the engine by hitting the rev limiter. In my opinion the limiter is set with safety calculated in. Not proud to admit it but I have hit mine numerous times thinking I can shift by ear like years ago, the next thing you know your at redline. These things just want to spin. JMO

christianchevell · 06-17-2016, 06:43 PM

With the age of your car ,yes it could be the tensioner pulley bearing, other pulley or slipping ac belt....Also you may want to get a speed hut shift light like I have its a great treat to have and is OBD 2 plug and play and programmable for launch and each gear and etc etc..... I too doubt bouncing off the rev limiter did anything...I would check everything you can including the throttle body bolts etc..... something loose may want that harmonics at that exact rpm level, in the old days we would use a piece of hose for a stethoscope and have a buddy rev to the range the rattle came from..LOL

DJ_BigC · 06-17-2016, 07:20 PM

did your AC belt jump a rib on the balancer?

usually if it's engine relates you would hear the noise all the time, it would just get louder as the engine would rev up.

Jasper · 06-18-2016, 06:20 AM

I visited my bud (mechanic) and he gave it a listen. He pulled the serpentine belt and it looked okay physically. He had me start and rev it with the belt off very briefly and the noise was gone. He put the belt back on an the noise was still on. He figures maybe the belt had something on it and was slipping. He recommends changing the belt anyhow since it's a 2011 and cheap to do. I feel much better now

J

christianchevell · 06-18-2016, 07:28 AM

Well good for you!

HOJO · 06-18-2016, 12:24 PM

Glad to hear. Give all your pulleys a good wipe down with a good cleaner while the belt is off to ensure they are clean as well.

06-16-2016, 07:26 PM	#1
Jasper Drives: 2011 Summit White Camaro SS (LS3) Join Date: Sep 2014 Location: Welland, Ontario Canada Posts: 542	Help with engine problem Hi, I'm quite concerned about my car at the moment. I was out with a buddy and gave it a couple of hard runs. I was talking at the time and accidentally hit the rev limiter not once, but twice. The second time, I heard a strange squeak/chain rattle sound coming from the front of the car. After further driving, I can repeat the sound even if I'm stationary with clutch in and simply rev to about 4K. I do not hear any noise during the rev or if accelerating until I let off the gas. As soon as i let off to shift, the rattle sound happens. I am able to hear it quite clear in the cabin. I have drivetrain warranty still but have been tuned. So I may have to revert to stock to take it in. I do not have any codes, the car drives normal and I don't hear the noise under light throttle. I have to be giving it a bit or reving upwards of 4K as mentioned. Anybody have any clue what could rattle/squeak like that? thanks, J __________________ Mods: Vararam intake, Solo axleback, VTC, Overkill in-car Tune, 3.91's.

06-17-2016, 07:10 AM	#3
christianchevell old school chevy rodder Drives: 2013 2SS/RS Manual,DM exhaust,CRT Join Date: Jul 2012 Location: Oregon Posts: 5,588 View My Garage	With the age of your engine , it could be belt slippage on the AC..... it could also be other things as well, and checking the top end is good, yet checking everything you can.....only you know where the sound came from and what it sounded like, heck could be clutch chatter, or could be the lousy ls3 chain tensioner just fell apart.... could be ? __________________ 2021 Wild Cherry ZL1 A10, Sunroof, Data, Carbon, Nav, RotoFab Dry CAI, Elite x2, Borla ATK, Driveshaft shop

06-17-2016, 07:13 AM	#4
Jasper Drives: 2011 Summit White Camaro SS (LS3) Join Date: Sep 2014 Location: Welland, Ontario Canada Posts: 542	My buddy also mentioned the timing chain tensioner. He was figuring if it was a valve spring or rod, i'd be throwing a code. I'll see what he says tonight after hearing the noise. I'm glad i've still got powertrain warranty and will only have to pay my tuner to put the stock code back in temporarily before going for repair. J __________________ Mods: Vararam intake, Solo axleback, VTC, Overkill in-car Tune, 3.91's.

06-17-2016, 09:11 AM	#6
caper Drives: 2010 IOM 2ss/RS Join Date: Sep 2009 Location: SoCal, I.E. Posts: 1,545	just a note - they can tell if its been tuned...sorry to say you dont have a warranty most likely. __________________ Turbonetics running 8lbs boost at 700rwhp tuned by Hi Rev, installed by K&M w/cat-muffler delete, ACS splitter, Fesler GFX, MPD1 spoiler, Custom painted Rally stripes, Cordon CR1 wheels 275/315s, Hotchkiss comp sways and end links, Barton shifter

06-17-2016, 12:07 PM	#8
Jasper Drives: 2011 Summit White Camaro SS (LS3) Join Date: Sep 2014 Location: Welland, Ontario Canada Posts: 542	Nope. The tune left the limiter alone. My warranty will be fine. I know the guys there really well. I did a bit more driving today and isolated the sound to exactly 4Krpm. I can be coasting in neutral with clutch in and if I rev to right around 4K, it will squeak continually. Anything above or below 4K and it stops. So I'm hoping it's just an accessory pulley (maybe bearings). J __________________ Mods: Vararam intake, Solo axleback, VTC, Overkill in-car Tune, 3.91's.

06-16-2016, 08:01 PM	#2
Fit4Ink Drives: 2010 Camaro 2SS/RS Join Date: Apr 2016 Location: Hawaii Posts: 75	If its a rattle noise I would pull the valve covers off and make sure you didn't snap a pushrod or damage a valve spring.

06-17-2016, 09:42 AM	#7
JusticePete Drives: Camaro Justice Join Date: Jun 2007 Location: Virginia Posts: 20,174	Did the overkill Tune raise the limiter?

06-17-2016, 06:10 PM	#9
HOJO Drives: 2014 Camaro SS/RS 1LE 1967 Camaro Join Date: Oct 2013 Location: Fort Wayne, IN Posts: 873	I really doubt you hurt the engine by hitting the rev limiter. In my opinion the limiter is set with safety calculated in. Not proud to admit it but I have hit mine numerous times thinking I can shift by ear like years ago, the next thing you know your at redline. These things just want to spin. JMO

06-17-2016, 06:43 PM	#10
christianchevell old school chevy rodder Drives: 2013 2SS/RS Manual,DM exhaust,CRT Join Date: Jul 2012 Location: Oregon Posts: 5,588 View My Garage	With the age of your car ,yes it could be the tensioner pulley bearing, other pulley or slipping ac belt....Also you may want to get a speed hut shift light like I have its a great treat to have and is OBD 2 plug and play and programmable for launch and each gear and etc etc..... I too doubt bouncing off the rev limiter did anything...I would check everything you can including the throttle body bolts etc..... something loose may want that harmonics at that exact rpm level, in the old days we would use a piece of hose for a stethoscope and have a buddy rev to the range the rattle came from..LOL __________________ 2021 Wild Cherry ZL1 A10, Sunroof, Data, Carbon, Nav, RotoFab Dry CAI, Elite x2, Borla ATK, Driveshaft shop

06-17-2016, 07:20 PM	#11
DJ_BigC Rockin' Steady Drives: 2010 Camaro 2SS Join Date: Apr 2012 Location: Timmins Posts: 216	did your AC belt jump a rib on the balancer? usually if it's engine relates you would hear the noise all the time, it would just get louder as the engine would rev up. __________________ Eric Carrier, proud GM Technician for over 10yrs. 2010 Camaro 2SS Black, L99, SLP headers, GMPP axle back, complete JRE tune, 22" Boss 337's, Nitto Invos 5% tint, Eforce Supercharger w. 3" pulley, ADM FPCM, ID850's, JRE fuel rail mod, Eforce CAI, Moroso catch can, spark plug insulators.

06-18-2016, 06:20 AM	#12
Jasper Drives: 2011 Summit White Camaro SS (LS3) Join Date: Sep 2014 Location: Welland, Ontario Canada Posts: 542	I visited my bud (mechanic) and he gave it a listen. He pulled the serpentine belt and it looked okay physically. He had me start and rev it with the belt off very briefly and the noise was gone. He put the belt back on an the noise was still on. He figures maybe the belt had something on it and was slipping. He recommends changing the belt anyhow since it's a 2011 and cheap to do. I feel much better now J __________________ Mods: Vararam intake, Solo axleback, VTC, Overkill in-car Tune, 3.91's.

06-18-2016, 07:28 AM	#13
christianchevell old school chevy rodder Drives: 2013 2SS/RS Manual,DM exhaust,CRT Join Date: Jul 2012 Location: Oregon Posts: 5,588 View My Garage	Well good for you! __________________ 2021 Wild Cherry ZL1 A10, Sunroof, Data, Carbon, Nav, RotoFab Dry CAI, Elite x2, Borla ATK, Driveshaft shop

06-18-2016, 12:24 PM	#14
HOJO Drives: 2014 Camaro SS/RS 1LE 1967 Camaro Join Date: Oct 2013 Location: Fort Wayne, IN Posts: 873	Glad to hear. Give all your pulleys a good wipe down with a good cleaner while the belt is off to ensure they are clean as well.