SoCalCal

iTrader: (4)

Im not sure if you can hear it on this video(most noticeable 14secs-19secs). Its not like its a loud obvious noise. I can hear it and the time in between tapping increases when I push the pedal. Ive done as much research as I could, so now I am posting.

p.s. This was recorded from my phone so the sound quality is iffy

http://youtu.be/MKk2vuqfW8A

*updated video* http://youtu.be/1IIs-XnzT3I

93 LT1 Vette

It doesn't sound like a rod but you never changed rpms on the motor.
Knocking is usually something deep in the motor going south like a rod or main bearing, piston slap or connecting rod issues.

Tapping is usually valvetrain issues. Rocker arm, lifter. Exhaust leaks can sound alot like a lifter or rocker problem.

Clicking could be an injector noise which may not be a problem at all.

Post the problem again with a better camera and change the engine rpm's so the problem is more audible.

tonygarcia1990

I really dont hear anything out of the ordinary. Can you pin point the noise anywhere at all? I would go get a stethoscope from harbor freight and just start listening to things.

SoCalCal

iTrader: (4)

Im gonna pull the HD camera out n get a decent video. I cant hear it from under hood. but inside the car and under i can hear it...I rev'd it up but my phone camera is a POS....new video coming

SoCalCal

iTrader: (4)

I dont hear it much....I looked at youtube videos of lt1s knocking and it sounds nothing like that. I know its coming from the lower section of the engine. I can barely hear it under the hood

nascarnate326

iTrader: (1)

Are you plugs all tight?

SoCalCal

iTrader: (4)

Should be ... They were tight when the new wires were installed...I check that as well

ZFreie

Any chance you've done any exhaust work? When I put my LTs on i was short one 3 inch band clamp and had to use the normal U clamps(i hate them) and had a small header leak that sounded like a lifter tick. Got another band clamp(ftw!), ticking went away.

I've also herd that a leaking exhaust manifold can sound like a ticking noise.

.02

killagt

iTrader: (3)

When did you start note this sound, how long you have the car ?

tonygarcia1990

like from the oil pan ???

93 LT1 Vette

Yeah if it was a rod bearing stacked or a wrist pin problem there'd be little question. I noticed headers in your video, check the collector gaskets if the noise is more audible down there under the car. High temp Permatex copper sealant on the header collector. then a new gasket then more copper sealant on the exhaust flange should correct the problem.

00FlowCamaro

Check your header gaskets. When I installed my longtubes and the paper gaskets that came with it started making a ticking noise, because they they burnt up. People on this forum thought it was a valvetrain tick but it was just the passenger side header gasket. I expected the worst, but it turned out to be not a big deal.

killagt

iTrader: (3)

What I have learn is, never use those gasket that came with header from ebay, buy a felpro gasket for it. Im glad my mechanic knew about this, and went ahead and get a felpro gasket when he did my install.

SoCalCal

iTrader: (4)

http://youtu.be/1IIs-XnzT3I
new video. Im thinking its an exhaust leak...but not sure... thanks for the help guys

transbird95

iTrader: (4)

It sounds like an exhaust leak to me but it is still a little hard to make out.

93 LT1 Vette

Check the oil for glittery metallic bearing material just for piece of mind. Drain a little into a jar. Has the noise been getting worse? Watch for a change in the normal oil pressure range from before the sound started. Hope it's just an exhaust leak. But the rattle sounds alot like a rod bearing when the motor rpms are coming up from idle. Hope I'm wrong. At 16 through 22 seconds you seem to really be able to hear at off idle

SoCalCal

iTrader: (4)

It hasnt gotten any worse . Im gonna chec the oil when I change the oil (soon). any one else have some feedback for me Hope it an exhaust leak