Knock, Knock whos there?

1392 Views 7 Replies 6 Participants Last post by levrac68, Feb 13, 2001

SpeedShift

Discussion Starter · Feb 12, 2001

I don't have this problem, but.... I let the car warm up to 100 degrees (coolant temp) before I even move it. Then I don't take it past 3000 rpm until the oil temp comes up. I've known people with LS1's that have beaten on them cold, and ended up sacrificing their cars to the piston gods!

-Speed

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2001 QuickSilver Z06
Lowered,178 thermostat w/ fan controller, Ripper, !CAGS, B+B PRT w/ Speedway tips, TRIC one-piece with CF Cobra, GMS MAF, and TPIS long tubes
AOL IM: Speedshift

[This message has been edited by SpeedShift (edited 02-12-2001).]

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BOBSZ06

· #2 · Feb 12, 2001

Speed, guess I'm not used to having to warm up a car before moving it. Never had to do that with my big block 396 in my Chevelle SS.
Humm, well it doesn't sound too bad, I just baby it til it is warm. Only have 330 miles on it and all very easy goin miles at that. Appears from the posts in CF that it does occur frequently...try it and see if you hear it on yours.
BOBS

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2001 Torch Red/Mod TR Z06

http://albums.photopoint.com/j/AlbumIndex?u=1520566&a=11496079
Zaino,CAGS defeat,Lloyds Z06 front/cargo mats,CAU decals,Z06 exhaust plate,Valentine 1/remote,BP Al Gas Pedal,power antenna,Dynamat Super interior,K&N air filter,Z06 TR Vette Rest,A&A frame savers.

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MiZ06

· #3 · Feb 12, 2001

2096 miles and haven't heard anything like that on mine, cold or warm.

Kevin D.

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BOBSZ06

· #4 · Feb 12, 2001

Symptom: Cold engine only, and under load while accelerating at 2000+ rpm. Almost sounds like a diesel! Definite knocking going on. After warm no knock.
Also does not do this at idle or at rpms when not under load.

At another forum, seems this has been noticed: http://corvetteforum.com/ubb/Forum1/HTML/035604.html

The service manual, Vol. 2 pg. 6-16 states:
Engine Noise Under Load
A cold piston knock which disappears in 1.5 minutes should be considered acceptable.

Appears this is normal. Everyone else have this noise?

Bob
2001 Torch Red/Mod TR Z06

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raj

· #5 · Feb 12, 2001

Bob, cool signature!

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'01 Torch Red/Torch Red Z06

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BOBSZ06

· #6 · Feb 13, 2001

Yep, using the right gas...its not the pinging from detonation. Definite knock. although I didn't even notice it this AM? Maybe I'll put the pistol back in the holster for now.

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2001 Torch Red/Mod TR Z06

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ZO6__01

· #7 · Feb 13, 2001

Bob, are you running 92+ octane? I only run with Supreme gasoline and have never noticed any knocking. Hope this helps.

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levrac68

· #8 · Feb 13, 2001

No to the Knock Knock. Have it on my **** Bronco though, just like you said.

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Quick Silver ZO6
Modified Red interior
Ripper w/ Momo knob
Vortex Ram Air

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