Daez

I am getting a tapping sound that matches rev speeds.. it's never there when I start the car, but it's there after it warms up for a bit. It's pretty ******* loud, if I have the hood popped, it's really loud.

Loud enough to where I can actually hear it a bit in the car with open long tubes, but only at idle, or barely moving.
Any idea?

*edited title for inappropriate language.

freshmanit

I'd say header leak? Had that problem before. Also, I managed to burn plug wires, and the arcing was sorta like that for me. Oh, and I also somehow got a plug to keep backing out, and you could hear the air going past it. Was mean. Between that, and the burned wire, I was loosing a lot of power.

My01SSCamaro

iTrader: (1)

how is it running besides the tapping? you might have a loose rocker arm you might check into it one way to tell if its an exhause leak is to put your car into first and take off you should be able to hear the ticking get up to about 35-40 and just let out of the gas and let it coast if it is still ticking then its not an exhaust leak

Gun5

iTrader: (37)

exhaust leak... but usualy thats when u start to

Daez

Hmm nah, I had an exhaust leak before, and I just changed the gaskets again.. it sounds like metal hitting metal.

Gun5

iTrader: (37)

rockers need adjusting? maybe lifters need a scope

the_merv

iTrader: (88)

Yea, could be the Rockers if you have them. I got a tick too, but it hasn't gotten worse, and been there since I built the Motor. Everything is in the correct lash adjustments also.

luckyou03

iTrader: (8)

probably not an exhaust leak. it would leak when the motor is cold. I'm going to guess loose rocker. Prolly just need a little tightening.

Although this is pretty rare but since your saying that the noise is LOUD Check your oil for shavings because i had a very loud tap myself. That would lead you to a cam/lifter problem. It happend to me.

http://www.lt1engine.com/soundlib/40lt1badlifter.mpg
http://www.lt1engine.com/soundlib/41lt1badlifter.mpg

Stock cam and lifter:
http://www.lt1engine.com/soundlib/lifter1.jpg
http://www.lt1engine.com/soundlib/lifter2.jpg

Gun5

iTrader: (37)

what happend there

*edited for inappropriate language

luckyou03

iTrader: (8)

motor just started tapping one day, and got progressively louder. Only made noise at idle and low rpm. I dont know if it was the cam or lifter that failed. This problem is a good thing tho, it made me build the car i never thought i would.

Gun5

iTrader: (37)

well thats good atleast something good came of it looks like something got inbetween the cam/lifter like dirt and ground it but damn it would have taken awhile i'd think

Daez

Yeah, my engine sounds like yours... anyway for e to double check if it's rockers instead? Cause I swapping engines anyway... so not camming this one, but I wanted to sell this complete swap from my car, and I can't sell junk ;p

JasonShort

iTrader: (242)

Daez, please keep the language clean in this forum. I edited the title line for inappropriate language.

Thanks, Jason

WhyHelloOfficer

iTrader: (5)

I had a chirping sound that kind of sounded like metal on metal. Here is the thread on that whole shabang. Turns out it was a rocker that came off the valve.
https://ls1tech.com/forums/showthrea...8&page=1&pp=20

Pull off your valve covers and re-adjust the valves at zero lash with the proper pre-load. It is pretty easy to do, and I'd imagine that could be your problem.

Here is a nice writeup Shoe Box did on adjusting them:
http://shbox.com/1/4th_gen_tech2.html#adjust_valves