riceless90

i have a 2001 ls1 with only 57k on the clock that has a noisy valvetrain and it is driving me nuts.
i have installed an ls6 ported oil pump,new comp lifters, new hardened stock length pushrods,new stock cam,new arp head studs stock gaskets, new arp rod bolts(so i have checked rod bearings also),i have tried different oils and filters . but nothing fixes the problem. i have not driven the car much or hard since the install. the engine has had this noise since i put it in the car.
it is in a 1991 rx-7 btw. the 2001 camaro donor car had a few bolt on mods but it did not look like the engine had been touched.

here is a video i took today of the car:
http://youtube.com/watch?v=tT4dm3sVniM

any help would be greatly appreciated.
thank you
-robert

riceless90

anyone got any ideas?

PREDATOR-Z

Check the O-ring on the oil pump. If pinched it will do that.

todds87ss

that noise is considered by many to be "normal" for the LS1 of that year. I have quieted mine down some using quality valve springs.
Good luck,
Todd

Assman

iTrader: (2)

My car sounds about the same and it drives me nuts, I never replaced the lifters when I did my h/c swap though and wish I would've now...

SladeX

I was having the same issue on mine. Oddly enough, if I added a half a quart of Bardahl's Oil stop Leak it'll keep it quiet on my car. I suspected a lifter that wasn't keeping up vs the double springs I was using.

Mine would get pretty annoying on a long drive. After 1 hour, it'd tap really loud, only a good rev to bring up pressure and then let idle to settle it would "pump" itself back up and be gone.

Check the oil pump o-ring and get a new one and see if that solves it.

riceless90

\

i installed a new o-ring with the ls6 oil pump and double checked it to make sure it wasnt pinched.

thanks for the input.

anyone else?

PREDATOR-Z

Check it again.

Assman

iTrader: (2)

If the o-ring was pinched, would the oil pressure be low too?

riceless90

if you look in the video my oil pressure is fine.

SladeX

Check preload of the pushrods, did you use a pushrod length checker on it?

Another theory I've been passing around on mine is that the double springs I'm using may be strong enough to force a lifter to collapse a bit and not under load not allow it to get up. I've noticed that if I let it idle (or coast for a good min or 2) the tick will go away.

Though my more semi-permanent solution of adding half a quart of stop leak seems to be working great now for over a month.

Assman

iTrader: (2)

I was saying theoretically wouldn't the pressure be low if the ring was pinched. I'm trying to figure mine out at the same time as you.

SlickWillie

iTrader: (4)

Just got a longblock put in my car and it acted fine for a few weeks of driving it on the weekend and now it is making the same noise. I pulled off the valve covers and everything looks to be ok. Sounds like it is coming from the lifters but i have no idea.