So I can hear some piston slap...
Thread Starter
Advanced
Joined: Jun 2010
Posts: 74
Likes: 0
From: College Station Texas (TX)
So I can hear some piston slap...
...under full throttle and I'm curious as to if this would be due to some weak stock valve springs. Should I upgrade to higher grade springs? roller-rockers? I will have a cam later on...but with the stock cam I cant risk dropping a valve into a 28K motor.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Piston slap has nothing to do with valvetrain, at 28k miles your springs should be just fine. Usually the slapping noise is hard to hear in the car and goes away once warmed up. Wondering if youre hearing something else.
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
... piston slap is the last thing you'll be able to hear at full throttle like the OP indicated.Typically, you'll hear piston slap while idling for about 2~3 min after a cold start-up. It should then go away ... that's what my '02 Z06 does.
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
Are you getting any trouble-codes? Have you checked for them?
Thread Starter
Advanced
Joined: Jun 2010
Posts: 74
Likes: 0
From: College Station Texas (TX)
Your profile indicates you have a 2003 Z06 ... so the stock valve train should be fine. All though, there have been a few members who have had stock valve spring failures on the 2003 Z06, but it is much more rare than on the 2002 Z06.
Are you getting any trouble-codes? Have you checked for them?
Are you getting any trouble-codes? Have you checked for them?
i obviously mis-used the term picton slap. i was under the impression it meant contact between the piston and the valves.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Pro
Joined: Mar 2004
Posts: 653
Likes: 0
Yup and thanks for clarifying what you're hearing. Piston slap is the pistons banging around against the cylinder walls, usually only happens on cold startup and yours should be pretty much immune if it's an '03. Teflon-coated piston skirts pretty much killed or reduced the problem '01 and older LSx engines had.
What octane gas are you running?
If less than 93, try the good stuff next fillup.
If 93, and you really only have 28K miles on it, might be in need of some injector cleaner from sitting for long periods. Chevron Techron seems to have good effect and is available at most parts stores, just dump in a bottle at next fillup.
What octane gas are you running?
If less than 93, try the good stuff next fillup.
If 93, and you really only have 28K miles on it, might be in need of some injector cleaner from sitting for long periods. Chevron Techron seems to have good effect and is available at most parts stores, just dump in a bottle at next fillup.
