Whine/Whistle after cam swap - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

3atman · 02-02-2014, 11:01 AM

Installed new cam, valve springs, push rods recently everything seemed to go just fine now that i have given it time to break in with very little to no valve train noise difference than stock. Im getting a very annoying whine/whistling noise that increases with rpm and is not present at idle. I have checked for vacuum leaks (just using brake cleaner ) I have also taken off the drive belt to rule out water pump, alt, ps, & idlers. At this point I'm at a loss I have used the search function and found a couple of people with the same problem but the thread died with no fix . I did however find a very similar problem on a c5 that was fixed by swapping the cam out that was just installed. Any advice would be great or if anyone has seen this before??

c5 whine

Also cam installed was a lingenfelter gt12 which I believe is a comp cam I did upgrade to a 3 bolt cam gear but kept the stock chain and tensioner (car has 10k) after searching I felt all that was ok to reuse .

vroomapunk · 02-02-2014, 11:35 AM

Not the intake tube, filter, etc? Thats weird man, always hard to tell where the noise is coming from in such close quarters too

BubbaSS · 02-02-2014, 11:39 AM

Did you do gears at the same time?

3atman · 02-02-2014, 12:04 PM

I have installed the intake several different times just to be sure it was not the issue.

Gears are stock and untouched.

3rdgen3 · 02-02-2014, 12:39 PM

The only things that spin and would make a sound like this IMHO with everything else you've ruled out so far would be one or more of the following:

1) Oil Pump
2) Timing Chain
3) Timing Chain Tensioner
4) Cam sprocket

Something related to one of these is my bet!

I wouldn't run the car anymore and peel the front cover off to have a look. Are you running a double roller timing set? Did you clearance the pump and cover properly? Stuff like that..

3atman · 02-02-2014, 03:38 PM

No double roller timing set and Oil pump was untouched sorry should have said that earlier. To clearance the timing cover I left the timing cover bolts loose and rotated the engine with the crank pulley inside the seal and slowly tightened them as I rotated .. ( Now that you mention it I see the special tool for this ) that might very well be the issue.. I will have to pull it apart and check it out , any other recommended ways to center the front timing cover without the tool ?

DieselMD @ Futral · 02-02-2014, 03:39 PM

Did you change throttle body? Have heard certain throttle body/intake combos whistle. Usually only does it on light throttle.

3atman · 02-02-2014, 03:52 PM

throttle body is stock and has never been off the car

LSX Camaro · 02-02-2014, 03:56 PM

Try running the engine with the oil cap off and see if the noise goes away. Did you change any of the PCV routing?

3atman · 02-03-2014, 05:27 AM

I will try running it with the oil cap off and see what happens.. I didn't disconnect any of the pcv hoses I was able to work around them .

Nightmare2012 · 02-03-2014, 10:41 AM

I have that whistle at light throttle and a local speed shop said it was normal since I re routed the pcv hoses and went with a ptb/vararam.

thahemp · 02-03-2014, 11:02 AM

That sounds like a belt to me. AC belt is the only one left though. It sounds like a belt with a rag held against it.

strych9 · 02-03-2014, 11:04 AM

IMHO, that is a timing chain or oil pump noise. I would get that stock chain tensioner out of there and use the LS2 chain dampener instead. To me it sounds like a noise you could get from the chain rubbing against the tensioner. What makes my argument a little thin is the fact that you are using the original chain with the original tensioner.

Keep us posted.

3rdgen3 · 02-03-2014, 11:32 AM

Quote:

Originally Posted by strych9

IMHO, that is a timing chain or oil pump noise. I would get that stock chain tensioner out of there and use the LS2 chain dampener instead. To me it sounds like a noise you could get from the chain rubbing against the tensioner. What makes my argument a little thin is the fact that you are using the original chain with the original tensioner.

Keep us posted.

This is exactly my thought and why i said what I said a few posts ago.

02-02-2014, 11:35 AM	#2
vroomapunk [COTW 5/12/14] Drives: 2012 CRT NF Cammed 2SS/RS For Sale Join Date: Oct 2011 Location: NOLA Posts: 6,115 View My Garage	Not the intake tube, filter, etc? Thats weird man, always hard to tell where the noise is coming from in such close quarters too __________________

02-02-2014, 11:39 AM	#3
BubbaSS WHAT RED LIGHT?! Drives: 2011 Black Camaro 2SS/RS M6 Join Date: Apr 2011 Location: Miami, Florida Posts: 1,115	Did you do gears at the same time? __________________ 2011 2SS/RS M6 BLACK - VARARAM NO TUNE INTAKE, MODDED AND PORTED TB, PORTED INTAKE MANIFOLD, VITESSE THROTTLE CONTROLLER, DOUG THORLEY LT'S, CATLESS, X-PIPE, 25" STAINLESS WORKS RETRO CHAMBERED MUFFLERS, CUSTOM 2.5" MANDREL BENT EXHAUST, RICHMOND 4.10 GEARS, CUSTOM CAM (231/242 @ 114LSA), MUSTANG DYNO TUNED BY TORQ, 20% CERAMIC TINTS, EIBACH PROKIT SPRINGS 1" DROP, HAWK PERFORMANCE CERAMIC BRAKES, NITTO INVO TIRES, HYDROCARBON TAIL LIGHT AND FOG LIGHT BEZELS BY EMBLEMPROS, METRA DASH KIT, JVC KW-AV71BT, PHOENIX GOLD iAMP GM1, PASSPORT QI45 - 450 RWHP 415 RWTQ

02-02-2014, 12:39 PM	#5
3rdgen3 10-bolt Destroyer Drives: 2012 Camaro 2SS/RS - AGM, LS3/6M Join Date: Jun 2012 Location: Canukistan Posts: 860	The only things that spin and would make a sound like this IMHO with everything else you've ruled out so far would be one or more of the following: 1) Oil Pump 2) Timing Chain 3) Timing Chain Tensioner 4) Cam sprocket Something related to one of these is my bet! I wouldn't run the car anymore and peel the front cover off to have a look. Are you running a double roller timing set? Did you clearance the pump and cover properly? Stuff like that.. __________________ 2012 Camaro 2SS/RS - LS3/TR6060: Cam, Headers, Exhaust, Intake, Gears, Twin Disk, Suspension, Tuned - 475rwhp, 443rwtq

02-02-2014, 03:56 PM	#9
LSX Camaro Master ASE, GM, LSX Tech. Drives: 2010 Camaro SS Join Date: Oct 2012 Location: Austin, TX Posts: 1,034	Try running the engine with the oil cap off and see if the noise goes away. Did you change any of the PCV routing? __________________ 2010 2SSRS A6, Custom Pat G. Cam, WCCH Cylinder Heads, Kooks Headers/Exhaust, BTR Valvetrain, Fluidampr 25% UDP, All Engine ARP bolts, Flex-a-lite radiator/Trans cooler, Yank converter, PFADT Suspension, ADM Race Intake/Scoop, Torq tow hook, CFD auto shifter, Dynojet AFR gauge, Aeroforce scan gauge, Brake Performance rotors/pads Prothane bushings, ZL1 wheels, spoiler, Z/28 wickerbill, 1LE Aero/Suspension Package, Anderson Composites COPO Carbon Fiber Hood, LED lighting, Elite Catch Can, Improved Racing oil pan baffle, crank scraper, windage tray 480 RWHP 452 RWTQ + Nitrous Express 150 Shot

02-03-2014, 11:02 AM	#12
thahemp Geek Drives: 2012 Black LS3 Join Date: Jan 2012 Location: Derby, KS Posts: 4,343 View My Garage	That sounds like a belt to me. AC belt is the only one left though. It sounds like a belt with a rag held against it. __________________ 01000111011011110110111101100100001000000110110001 11010101100011011010110010000001110111011010010111 01000110100000100000011101000110100001101001011100 110010000001101111011011100110010100100001 x = ac97968bd3df8f968c8cd3df998a9c94d3df9c8a918bd3df9c 909c94df8c8a9c949a8dd3df92908b979a8ddf998a9c949a8d d3df8b968b8cd1 x = ~x

02-02-2014, 12:04 PM	#4
3atman Drives: 2010 ls3 camaro Join Date: Jul 2013 Location: Canal Winchester Ohio Posts: 41	I have installed the intake several different times just to be sure it was not the issue. Gears are stock and untouched.

02-02-2014, 03:38 PM	#6
3atman Drives: 2010 ls3 camaro Join Date: Jul 2013 Location: Canal Winchester Ohio Posts: 41	No double roller timing set and Oil pump was untouched sorry should have said that earlier. To clearance the timing cover I left the timing cover bolts loose and rotated the engine with the crank pulley inside the seal and slowly tightened them as I rotated .. ( Now that you mention it I see the special tool for this ) that might very well be the issue.. I will have to pull it apart and check it out , any other recommended ways to center the front timing cover without the tool ?

02-02-2014, 03:39 PM	#7
DieselMD @ Futral Drives: G8 Join Date: Feb 2013 Location: La Posts: 110	Did you change throttle body? Have heard certain throttle body/intake combos whistle. Usually only does it on light throttle.

02-02-2014, 03:52 PM	#8
3atman Drives: 2010 ls3 camaro Join Date: Jul 2013 Location: Canal Winchester Ohio Posts: 41	throttle body is stock and has never been off the car

02-03-2014, 05:27 AM	#10
3atman Drives: 2010 ls3 camaro Join Date: Jul 2013 Location: Canal Winchester Ohio Posts: 41	I will try running it with the oil cap off and see what happens.. I didn't disconnect any of the pcv hoses I was able to work around them .

02-03-2014, 10:41 AM	#11
Nightmare2012 come find out;) Drives: stockish 2012 camaro ss Join Date: Oct 2012 Location: speed county Posts: 2,166 View My Garage	I have that whistle at light throttle and a local speed shop said it was normal since I re routed the pcv hoses and went with a ptb/vararam.

02-03-2014, 11:04 AM	#13
strych9 I'll be back... Drives: Subaru, HD Road Glide Special Join Date: Apr 2012 Location: Omaha, NE Posts: 3,036 View My Garage	IMHO, that is a timing chain or oil pump noise. I would get that stock chain tensioner out of there and use the LS2 chain dampener instead. To me it sounds like a noise you could get from the chain rubbing against the tensioner. What makes my argument a little thin is the fact that you are using the original chain with the original tensioner. Keep us posted. __________________ Bye bye, Bumblebee! --------------------------------------------------------------------------------------- Build Journal My Garage GoPro Mic Hack