Does your C6 do this?
Thread Starter
Burning Brakes
Joined: Dec 2004
Posts: 810
Likes: 1
From: Turbocharged in NC
Does your C6 do this?
I have a 2005 that is 3 months old, and has 1500 miles on it. About half the time that I get in my car and start it up in the morning, it ticks like several of the lifters are collapsed, then they pump up and the noise goes away.
I don't remember either one of my c5's ever doing it, also the valve train seems noisier than the c5.
What do you think, trip to the dealer, or ignore it, they all do it?
I hate the thought of going for warranty work on my new motor, and I can imagine them trying to trouble shoot this kind of intermittant problem.
I don't remember either one of my c5's ever doing it, also the valve train seems noisier than the c5.
What do you think, trip to the dealer, or ignore it, they all do it?
I hate the thought of going for warranty work on my new motor, and I can imagine them trying to trouble shoot this kind of intermittant problem.
Heel & Toe
Joined: Oct 2005
Posts: 19
Likes: 0
From: Atlanta GA
I just hit 1,500 miles with my '06 Z-51 and no lifter tick on it. I am in Atlanta so the ambient temp has still been pretty warm (55-60 degrees in my garage in the morning).
I would take it to the dealer. My wife's 05 GMC Denali with the iron block 6 liter has no lifter tick in it even of left outside and it now has 10k miles on it.
I would take it to the dealer. My wife's 05 GMC Denali with the iron block 6 liter has no lifter tick in it even of left outside and it now has 10k miles on it.
Team Owner
Joined: Dec 2003
Posts: 21,840
Likes: 140
From: When all is said and done... there is a hell of a lot more said than done. Riverside,Texas
St. Jude Donor '05 thru '26
Originally Posted by wewing
Thanks for the replies, its off to the dealer for first time warranty work 
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Team Owner
Joined: Sep 2000
Posts: 25,001
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From: Far NW 'burbs of Chicago
St. Jude Donor '13
My C5 has a similar noise, but I'm pretty sure it isn't lifters because it starts 5-10 seconds after the engine is running. Goes away after a couple of minutes. Been doing it for 68,000 miles, no problems.
Some folks say the injectors can mimic the noise of a bad lifter.
Some folks say the injectors can mimic the noise of a bad lifter.
Race Director
Joined: Mar 2005
Posts: 16,684
Likes: 1,193
From: La Center WA
Mine has done it a few times, exactly as you describe. It's not half the time, but maybe once every 10 starts. When it happens, it lasts for no more than 2 or 3 seconds. I haven't been too worried about it. If you learn anything from the dealer, please let us know, though. Thanks.
Instructor
Joined: Oct 2004
Posts: 172
Likes: 0
From: Northern CA
Originally Posted by Gearhead Jim
Some folks say the injectors can mimic the noise of a bad lifter.
wewing, I think I remember a discussion on your noise before. Might want to do a search. I think (can't remember for sure) that it is momentary piston slap. I get it very occasionaly with my Silverado upon start up. Better to safe than sorry though.
Team Owner
Joined: Sep 2004
Posts: 49,692
Likes: 9
From: Life isn't about waiting for the Storm to pass, it's about learning to dance in the Rain.
Originally Posted by wewing
I have a 2005 that is 3 months old, and has 1500 miles on it. About half the time that I get in my car and start it up in the morning, it ticks like several of the lifters are collapsed, then they pump up and the noise goes away.
I don't remember either one of my c5's ever doing it, also the valve train seems noisier than the c5.
What do you think, trip to the dealer, or ignore it, they all do it?
I hate the thought of going for warranty work on my new motor, and I can imagine them trying to trouble shoot this kind of intermittant problem.
I don't remember either one of my c5's ever doing it, also the valve train seems noisier than the c5.
What do you think, trip to the dealer, or ignore it, they all do it?
I hate the thought of going for warranty work on my new motor, and I can imagine them trying to trouble shoot this kind of intermittant problem.
Melting Slicks
Joined: Oct 2005
Posts: 2,077
Likes: 0
From: Orlando Florida
Originally Posted by wewing
I have a 2005 that is 3 months old, and has 1500 miles on it. About half the time that I get in my car and start it up in the morning, it ticks like several of the lifters are collapsed, then they pump up and the noise goes away.
I don't remember either one of my c5's ever doing it, also the valve train seems noisier than the c5.
What do you think, trip to the dealer, or ignore it, they all do it?
I hate the thought of going for warranty work on my new motor, and I can imagine them trying to trouble shoot this kind of intermittant problem.
I don't remember either one of my c5's ever doing it, also the valve train seems noisier than the c5.
What do you think, trip to the dealer, or ignore it, they all do it?
I hate the thought of going for warranty work on my new motor, and I can imagine them trying to trouble shoot this kind of intermittant problem.
Mine does it every blue moon, I just shut it off and turn it on again and it goes away.
Race Director
Joined: Oct 2004
Posts: 10,089
Likes: 14
Originally Posted by wewing
I have a 2005 that is 3 months old, and has 1500 miles on it. About half the time that I get in my car and start it up in the morning, it ticks like several of the lifters are collapsed, then they pump up and the noise goes away.
I don't remember either one of my c5's ever doing it, also the valve train seems noisier than the c5.
What do you think, trip to the dealer, or ignore it, they all do it?
I hate the thought of going for warranty work on my new motor, and I can imagine them trying to trouble shoot this kind of intermittant problem.
I don't remember either one of my c5's ever doing it, also the valve train seems noisier than the c5.
What do you think, trip to the dealer, or ignore it, they all do it?
I hate the thought of going for warranty work on my new motor, and I can imagine them trying to trouble shoot this kind of intermittant problem.
Race Director
Joined: Oct 2005
Posts: 14,999
Likes: 200
From: Bay Area Ca.
Same problem different car
My 4 Runner has done this since entering the first winter. I think it might be piston slap, 130,000 miles later still does it. Usually only on cold mornings last about the time it takes to back out of the garage and start heading down the street. I was told no worries by the dealer. I don't know about that. I still use no measurable oil. Use synethic and change 12,000 miles with filter change at 6,000 miles. By the way this care has been problem free. I know not to do with C6 just thought that it might be more common occurance across the board.
Last edited by Boomer111; Dec 3, 2005 at 09:31 PM.
Burning Brakes
Joined: Feb 2005
Posts: 1,113
Likes: 8
From: Whitehall PA
I hear a slight ticking in my engine at low speed and light throttle. Under normal driving conditions (acceleration, cruising) I don't hear a thing. If you don't hear the ticking or tapping noise increasing and decreasing with rpm's it is most likely not a valve but injector noise. A valve tap is pronounced and doesn't generally go away unless engine rpm is so high it becomes indistinguishable.
Race Director
Joined: Oct 2004
Posts: 10,089
Likes: 14
Originally Posted by mpuzach
What exactly is "piston slap"?