Valve Noise - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Missile Man · 08-25-2009, 09:46 AM

At about 1100 miles on the OD I've noticed valve tappet noise when starting my Camaro 2SS A6. It last for a couple of seconds then goes away. I wounder if the AFM in the valve train assembly has any impact? Anyone else experience this?

2010cantwait · 08-25-2009, 11:06 PM

My car made the same noise also. (2SS A6) It went away when I changed the oil- if that helps you any...

Missile Man · 08-26-2009, 09:31 AM

Quote:

Originally Posted by 2010cantwait

My car made the same noise also. (2SS A6) It went away when I changed the oil- if that helps you any...

Thanks for the input. I'm changing the oil this weekend.

BlemsBumble · 08-27-2009, 01:03 AM

Yeah, I noticed that for the first time today....L99 @ 600 miles. Start up, lasts about a second. I haven't heard that sound in many a year.

Robert91RS · 08-27-2009, 12:46 PM

Probly just dry start but be sure to check your oil filter and the oil catch pan for rocker arm bearings that have fallen apart. I know this has happened to some LS7's.

PsyDoc · 08-27-2009, 01:42 PM

Is GM still assembling engines through a "Net Build" process? I had a Malibu back in 2001 that had "piston slap" due to GM's change from matching pistons to cylinders to the "Net Build" process that assumes all pistons will fit equally into all cylinders. If the noise goes away shortly after start-up (a few seconds to a couple of minutes), then that might be the case as the piston is not as tight in the bore as when the engine is warm. The reason it does not last long is due to the combustion heating up the piston sufficiently to expand it more tightly into the bore. But, this issue has been around for years and not just with GM. Remember, you have explosions occurring inside a sealed environment and lots of metal parts interacting with one another, so there is going to be some noise. Remember solid lifters in an era long ago?

2010cantwait · 08-27-2009, 10:22 PM

Yes, it sounds exactly like piston slap. I don't drive the car a lot, so there are some dry starts. That's when I heard it the most; when it sat for a few days before the first oil change.

Missile Man · 08-31-2009, 11:01 PM

Mines not piston slap, definitely valve tappet noise. Changed oil last week and still have valve tappet when starting for a couple of seconds. This to me is not normal operation. I'll find out when I take it to the dealer when after my list is full.

Terrellford12 · 09-02-2009, 04:45 AM

Use the lucas gas cleaner

08-25-2009, 09:46 AM	#1
Missile Man Drives: 2010 2SS/Black Join Date: Mar 2009 Location: Tucson, AZ Posts: 608	Valve Noise At about 1100 miles on the OD I've noticed valve tappet noise when starting my Camaro 2SS A6. It last for a couple of seconds then goes away. I wounder if the AFM in the valve train assembly has any impact? Anyone else experience this? __________________ 2010 Black 2SS L99 Mods: * CAI Intake * Magnuson MP2300 TVS Supercharger/RDS Spacer * Vector Motorsports Tune * Stainless Power LT/Hi Flow Cats/Tru X-* Pipe/36" J-Pipes/40 Series * R1 Concepts ceramic pads and slotted/drilled rotors

08-25-2009, 11:06 PM	#2
2010cantwait not waiting anymore Drives: vehicles Join Date: Apr 2009 Location: Ottawa,Illinois Posts: 160	My car made the same noise also. (2SS A6) It went away when I changed the oil- if that helps you any... __________________ 2010 Camaros are COOL #NDMPQK ordered 10/15/08 Delivered 6-03-09 VIN 11518

08-27-2009, 01:03 AM	#4
BlemsBumble Drives: '13 ZL1 #662; '10 SS; '99 SS Join Date: May 2009 Location: Clovis CA Posts: 457	Yeah, I noticed that for the first time today....L99 @ 600 miles. Start up, lasts about a second. I haven't heard that sound in many a year. __________________

08-27-2009, 10:22 PM	#7
2010cantwait not waiting anymore Drives: vehicles Join Date: Apr 2009 Location: Ottawa,Illinois Posts: 160	Yes, it sounds exactly like piston slap. I don't drive the car a lot, so there are some dry starts. That's when I heard it the most; when it sat for a few days before the first oil change. __________________ 2010 Camaros are COOL #NDMPQK ordered 10/15/08 Delivered 6-03-09 VIN 11518

08-31-2009, 11:01 PM	#8
Missile Man Drives: 2010 2SS/Black Join Date: Mar 2009 Location: Tucson, AZ Posts: 608	Mines not piston slap, definitely valve tappet noise. Changed oil last week and still have valve tappet when starting for a couple of seconds. This to me is not normal operation. I'll find out when I take it to the dealer when after my list is full. __________________ 2010 Black 2SS L99 Mods: * CAI Intake * Magnuson MP2300 TVS Supercharger/RDS Spacer * Vector Motorsports Tune * Stainless Power LT/Hi Flow Cats/Tru X-* Pipe/36" J-Pipes/40 Series * R1 Concepts ceramic pads and slotted/drilled rotors

08-27-2009, 12:46 PM	#5
Robert91RS Drives: Everywhere Join Date: Jun 2008 Location: TX Posts: 852	Probly just dry start but be sure to check your oil filter and the oil catch pan for rocker arm bearings that have fallen apart. I know this has happened to some LS7's.

08-27-2009, 01:42 PM	#6
PsyDoc Drives: Soon-to-be 1st Gen Join Date: Nov 2008 Location: Southeast Posts: 249	Is GM still assembling engines through a "Net Build" process? I had a Malibu back in 2001 that had "piston slap" due to GM's change from matching pistons to cylinders to the "Net Build" process that assumes all pistons will fit equally into all cylinders. If the noise goes away shortly after start-up (a few seconds to a couple of minutes), then that might be the case as the piston is not as tight in the bore as when the engine is warm. The reason it does not last long is due to the combustion heating up the piston sufficiently to expand it more tightly into the bore. But, this issue has been around for years and not just with GM. Remember, you have explosions occurring inside a sealed environment and lots of metal parts interacting with one another, so there is going to be some noise. Remember solid lifters in an era long ago?

09-02-2009, 04:45 AM	#9
Terrellford12 Drives: 2010 SS/RS & 2017 SS/RS Join Date: Jan 2009 Location: Bunkie La Posts: 341	Use the lucas gas cleaner

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