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Old 05-12-2005, 08:34 AM   #16
Katty
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Quote:
Originally posted by FLYGUY
I agree with everything that MAVEN has said in his post, but I hope that his information is not reason to believe that, because all GM engines are noisy, all the worlds car engines are also noisy. It isn't so, I have owned cars that had such quiet running engines that I sometimes wondered if it had quit running. In fairness, I also have to say that those cars also cost more than our beloved Corvette's.

I am driving a new C6 LS2, my 5th Corvette since 1994, and I feel very fortunate to own this car. Do I wish that the engine noise, or "piston slap" was not there, sure I do, but does it bother me, or worry me in the least, no, not at all. This engine sound comes with the GM territory, forget it, and enjoy this fantastic car.
So you have it?
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Old 05-12-2005, 08:54 AM   #17
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Quote:
Originally posted by Katty
So you have it?
Hi Katty;

Yes, I have it. Also had it on my previous (4) Vette's.
After 2 to 3 minutes of running, after the initial start up, it just fades away. Gm should start listing this sound in their "Standard Equipment" list.

If you really feel uncomfortable with it, a call to a Chevrolet Dealer that has a Corvette Specialist, would be able to explain it in detail for you.

Are you in the process of buying a new C6? If you are, best of luck, and I know that you will love the car.
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Old 05-12-2005, 09:02 AM   #18
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After owning four C-4's and now a C-5 Z06, I agree, they are a bit noisy, more so than say, my ML, can't hear the thing running sometimes. I highly suggest the LG Longtubes w/Bullets! That will certainly put an end to hearing those pesky pistons and injectors.
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Old 05-12-2005, 09:20 AM   #19
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Quote:
Originally posted by AK's Z06
After owning four C-4's and now a C-5 Z06, I agree, they are a bit noisy, more so than say, my ML, can't hear the thing running sometimes. I highly suggest the LG Longtubes w/Bullets! That will certainly put an end to hearing those pesky pistons and injectors.
A much cooler sound to listen to...
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Old 05-12-2005, 09:34 AM   #20
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ROCK ON AK !!! truly my philosophy as well......However I cant tell people to just roll down the window, or turn on radio, or install headers to get rid of whatever "weird" noise they hear....I SOOO wish I could...do you realize how many people drive around with windows up, radio off, and HVAC blower fan off, apparently just listening to the noises their car makes.
I would go insane if I had to drive around like that.

GM has a term for these noises that result from normal or non-detrimental interactions in a vehicle: COMMERCIALLY QUIET.......how about that. I much prefer to use "characteristic of operation" or "inherent acoustical event"
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Old 11-17-2010, 09:12 PM   #21
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Quote:
Originally Posted by Katty View Post
Hmmm, just heard about thie at the local dealer...said there were more than a few issues with this LS2 as well.
Anyone have it?????
I have '07 LS2, it had piston slap noise when cold (1st 10 minutes) from new, now 34K miles and a bit worse. Took it to Quality Chevrolet in Escondido, CA. They said it was common complaint, but not to worry, "it is normal, per design". They are not going to fix it.

They claim it is caused by short skirt forged piston in aluminum block, which expands to normal clearance when hot.

Guess it s a good idea to warm these babies up before racing?
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Old 11-18-2010, 08:10 AM   #22
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Piston slap - yup: so what?

My LS2 had it and my LS3 has it too. I give it no thought at all as, at worst, is sounds like a tad too much timing but no 'ping'. It does not sound 'deep' like a knock.

It does NO harm and the things, LS series, just haul butt for a SBC.

My 66 year old advise is this - it is at best a minor annoyance and not harmful at all; let it go.
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Drive it like you HATE it!

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Old 11-18-2010, 08:27 AM   #23
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Luckily my 2005 doesn't have the dreaded piston slap. My 2000 had it for about 5 minutes or so upon cold start.

Like Ivan said it's basically a minor annoyance but nothing to worry about.
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Old 11-18-2010, 09:52 AM   #24
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Well I would imagine that within the last 5+ years most of the original posters have either sold their C6s or learned to live with it.

Originally posted on 5-05-2005
Last post on 5-12-2005!

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Old 11-18-2010, 10:08 AM   #25
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well I havent heard of a single engine falure due to piston slap so why is it even a concern?
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Old 02-03-2013, 03:25 PM   #26
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Old thread here. Has anyone had a problem related to the piston slap noise? Any engine failures or rebuilds as a result? My 07 LS2 with 38,000 miles has developed this noise but fades away after 20 seconds or so. thanks...
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Old 02-08-2013, 10:52 AM   #27
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Slappin

Quote:
Originally Posted by mop423 View Post
GM is known for piston slap in its engines, the LS2 dosen't surprise me. I've heard nicknames like "GM engines - like a knock" it's so well known.
Long time reader, first time replier!
The only slapping I hear in my 08-LS3 is the wife slapping me to stop running it so hard.
"Can't help it" I tell her its someone's garage door opener frequency interfering with the throttle position sensor!

08-Z51,Manual, Halltech Killer Bee II COI, Billy Boat Bullet exhaust and x-pipe, VMax throttle body.
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Old 02-08-2013, 11:47 AM   #28
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Quote:
Originally Posted by rdevaux2007 View Post
Old thread here. Has anyone had a problem related to the piston slap noise? Any engine failures or rebuilds as a result? My 07 LS2 with 38,000 miles has developed this noise but fades away after 20 seconds or so. thanks...
My LS1 does the same exact thing and I run it hard whenever I can. 140,000+ miles and still kickin' ass.

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Old 02-10-2013, 08:27 PM   #29
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Quote:
Originally Posted by janstubbs View Post
I have '07 LS2, it had piston slap noise when cold (1st 10 minutes) from new, now 34K miles and a bit worse. Took it to Quality Chevrolet in Escondido, CA. They said it was common complaint, but not to worry, "it is normal, per design". They are not going to fix it.

They claim it is caused by short skirt forged piston in aluminum block, which expands to normal clearance when hot.

Guess it s a good idea to warm these babies up before racing?
i have never heard any piston slap in my c6 ls2 and the ls2 doesnt have forged pistons, i dont know how many 1/4 mile passes and over 200 mph topend pulls, but it has been driven fast for 37,000 miles and might reach 9s NA stock bottom end very soon
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Old 02-20-2013, 10:28 AM   #30
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Knock on start up

My 03 Suburban has knocked on start up for 130,000 miles. Could somebody please tell me, should I be worried?
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