2015GTRBE

I really hope this isn't rod knock or other damage
https://youtu.be/tPK-fVtvKiw

https://youtu.be/GnKy2tLvsNQ

Pounder

it doesn't sound like a rod knock, unless it's really bad ??? tensioner ???

2015GTRBE

I was thinking water pump or maybe tensioner but I'm not sure. I'm praying it's just the tensioner or minor item.

Pounder

with a knock that bad I would think the oil pressure would be way down ?????? take the belt off and see what happens then ???

feeder82

that's not rod knock, that would be rhythmic with the engine rpm.

WildRide357

yea tensioners went weird on my car, too

Stroker87

hard to tell but i think valve train?

grantv

My thoughts; perhaps a broken valve or spring?

neutron82

it sounds like the engine is running smooth to me... if I had to guess I'd say it's something on the outside of the engine or possibly in the clutch area

El original

Not a rod or anything serious...take the belt off and you will find the issue. The engine is running too smooth for anything serious. Please let us know what you find. Good luck.

LoneStarFRC

On again/off again almost like something is loose and making intermittent contact with a rotating part. Something in the accessory drive like idler/tensioner pulley or possibly harmonic balancer. Maybe even something caught in one of the cooling fans or one of the belts.
Pictures are too dark down in front area to get a good eyeball.
Definitely not rod knock...

Stroker87

if it was a pulley or something in the belt system i'm sure there would have been a squeak or something before it got this bad, to me it sounds like something in the valve train like a broke rocker or something getting knocked around

i had a ls with a bad valve at idle car was smooth idle but driving it there was a slight miss and the exhaust note was different

2015GTRBE

Update **** the noise was indeed the A/C TENSIONER. The car is at the Vette Doctors in Long Island NY. All is good.

2015GTRBE

Thanks for the input guys

Pounder