Rocktagon

iTrader: (1)

At first I thought this was an exhaust leak but after further investigation there seems to be a strange ticking noise coming from the engine that starts happening at 1900 RPM's. When held at 1900 RPM it's consistent and fairly loud. Above those RPM's it starts to gets quicker and not as loud.

- Happens with or without A/C on
- Felt the relays while this was happening, they seemed fine

Any ideas???

Thanks

Navy02ss

iTrader: (9)

I think I am suffering the same issue you are having except mine almost sounds like a slapping sound. Either way, I can maintain the noise by keeping the engine around 2,000 rpm. I have not noticed any degradation is performance as of yet. I am not throwing any codes either. Figure anything out on this yet?

01BlueSS1995

same here, i have no idea what it is.

jaxcam02

iTrader: (1)

I thought I was the only one. I can't wait for someone to help us out. Its weird how its just happening at exactly a constant 2000. odd

01 CamaroSS SLP

i have it too.for me its slight piston noise sounds like a slapping. I have noticed a lot of ls1 engines have this, i brought it to a lsx specialist and he said i wouldnt worry about it. I am in no way telling you guys to ignore your engine noise because i have no idea what could be wrong with yours. As for me after hearing the specialist and a few other people tell me its normal and hearing multiple ls1s with the same noise i just ignored it. Some days its louder than others, but its been like this for 20k miles and i have found no metal shavings in the oil and my car has been running fine so IM just going to ignore it.

FiredUpZ28

Coil pack brackets loose?

stinkynuts

iTrader: (7)

Same issue just started for me. I realize it could be several things. anybody care to chime in??

ZERO_POLLO

iTrader: (2)

I have the same problem in mine, have it in the shop, there seems to be nothing wrong with it, they are changing the springs just in case, I will let all know if this fix the problem. Also the mechanic told that it can be the oil pump not having in off pressure.

stinkynuts

iTrader: (7)

thanks. Just keep us up to date.
Everyone seems to say the same thing. Either it's just how LS motors sound or it's my cam or piston slap. I just wanna know for sure it's not something destroying itself before i ride it out..

ZERO_POLLO

iTrader: (2)

heard back from the mechanic today they change springs and the oil pump, turn it on and is still doing the same ticking sound around 2000 rpm, there going to check it again to see if they can find whats the problem. Getting a little worry about this

ZERO_POLLO

iTrader: (2)

Update: We are changing the lifters, the mechanic told me that probably one them is bad, so he is going to get work on that today

gm02ceta

iTrader: (9)

How many miles do you have on your motor?

ZERO_POLLO

iTrader: (2)

96000 miles, 25000 of them with a Cam.

tjwashow

iTrader: (2)

lifters going bad? I have the same kind of noise but gets quiter or non existant when the enginge warms to temp. did you change lifters when you did your cam? I am going to be doing my lifters when id o my cam in the next month or so.

ZERO_POLLO

iTrader: (2)

I didn't change them when the cam was installed, mine starts ticking around 2000 rpms and gets louder as the rpm's go up

azredbird

iTrader: (6)

Thread is a year old. However, did anyone determine what the problem was that caused the knocking/slapping sound at ~2,000 rpms?.

blue09rocket

this is for anyone in the post who has had an issue, I have a video on youtube, type in "2000 Trans Am noise at 2100 rpm" Is this the noise you guys are getting?

DaytonaBlues

i cant hear a damn thing in that video..old thread but i got the same ticking loud loud at 1800 rpm ONLY....WTF!!! im thinking of pulling the rocker covers and torquing all my rockers to 22 lb ft...i cant think of what else to do..post that video with the hood open..i got a post on here with the noise too.

RockinWs6

The cause of the noise maybe air getting into the lifters from the pickup oring. It very common, it will quiet down at a idle but as son as you rev the air starts to collect in the lifters and they tap. Seen this many many times.

azredbird

iTrader: (6)

Here is an example of the sound I am interested in knowing its cause, www.youtube.com/watch?v=BcRv9px135o.

From time 0:09 to 0:12, if you can ignore the low frequency hum of the exhaust as well as the hiss of the air being drawn into the carburetor, you may be able to hear the clacking/knocking sound.