Engine Ticking
Thread Starter
Racer
Joined: Nov 2006
Posts: 289
Likes: 130
From: Santa Barbara CA
Engine Ticking
My 23 C8 HTC with 2775 miles has an engine tick. Dropped it off at the dealer tonight. Is this normal? What do you all think the dealer should do? What if they say it is normal?
Thanks so much,
Scott
Thanks so much,
Scott
Popular Reply
Jul 31, 2022, 09:22 PM
Le Mans Master
Joined: Dec 1999
Posts: 6,516
Likes: 4,840
From: One Hour From Boston!
Most likely Direct Injection. NORMAL.
Drifting
Joined: Aug 2013
Posts: 1,502
Likes: 515
From: Hill Country Texas
I don't think it has anything to do with DI, it's a sewing machine sound common on all LS/LT motors. It's the lifters being pushed up and down by the push rods, (which open and close your valves.) There have been issues with some of the lifters, but these were usually the AFM lifters. The OE lifters that GM use are kinda cheap and as such, random failures are not unheard of. I didn't use them (not even new ones) when I went through my LS7 (went with Johnson 2110 lifters like what GM uses in their COPO Camaro's).
Advanced
Joined: Aug 2021
Posts: 56
Likes: 28
From: Central FL
I've got the same "ticking" sound in my 2021 Z51 2LT. Definitely sounds like a valve/lifter kind of thing. Good news is it doesn't always happen and when it does it's mostly before the engine is fully warmed up and it seems to go away completely after 15 minutes of driving. In a year i've only got 2800 miles on it and it seems to be happening less often and goes away quicker too. It's just a bit of an annoying sound and doesn't seem to be affecting anything. When I take the car in to the dealer (Stingray Chevrolet) for its first oil change and trans filter i will mention it to them. If anyone has heard this before they probably have, but I'm not sure what can be done without dropping the engine.
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Race Director
Joined: Sep 2016
Posts: 13,180
Likes: 10,522
AFM doesn't add more noise. If anything, in 4 cyl mode it would be marginally quieter, since only 4 injectors are firing and only 8 valves are opening and closing.
As far as the OP's concern, without hearing it no one knows. It's probably just the injectors, which is normal, but it could be a bad lifter, an exhaust leak, or maybe other things. Diagnosing a noise without being able to hear it is kind of a fool's game.
As far as the OP's concern, without hearing it no one knows. It's probably just the injectors, which is normal, but it could be a bad lifter, an exhaust leak, or maybe other things. Diagnosing a noise without being able to hear it is kind of a fool's game.
Burning Brakes
Joined: Feb 2007
Posts: 1,041
Likes: 566
From: Bolingbrook IL
Thread Starter
Racer
Joined: Nov 2006
Posts: 289
Likes: 130
From: Santa Barbara CA
I am installing magnets to easily remove heat shield and show off engine!
https://www.corvetteblogger.com/2021...lt2-v8-engine/
This engine cover.
https://www.ebay.com/itm/15383877542...4aAgBIEALw_wcB
https://www.corvetteblogger.com/2021...lt2-v8-engine/
This engine cover.
https://www.ebay.com/itm/15383877542...4aAgBIEALw_wcB
Racer
Joined: Aug 2020
Posts: 350
Likes: 173
Thank goodness it’s not a spun crank bearing. Those sound like ticking too. There is a good vid on YouTube of a brand new GT350 or 500 at the dealer ticking away with its spun bearing. It was a hand built engine as well. Probably built on a Monday!
