charlie c5

iTrader: (6)

I've got an 02' TA with a built 346, and a turbo.. I was out playing around last night and was coming to a stop and down shifted and accidently went to 1st instead of 3rd, and I pulled into the parking lot and noticed a tapping noise. The tapping noise speeds up when I bring the RPM's up. and slows down when the RPM's slow down. Any ideas at what It might be, and how I can check it out..? Thanks....

fast377

iTrader: (52)

pushrod, valve spring, rocker...pull a valve cover and check it out. How high did it rev?

charlie c5

iTrader: (6)

It reved pretty high, didn't red line, I didn't really see. I just pulled the driver's side valve cover, that's where the sound seemed to be coming from. Don't really see anything. But, I'm not a mech and don't really know what to look for..

LS100CAMSS

May also be a lifter.

charlie c5

iTrader: (6)

How do I check..?

charlie c5

iTrader: (6)

Well, I pulled the valve covers and the push rods. Man these things are pretty. lol. anyway, they look fine. I rolled them on my super expensive glass breakfast table, and they seem to be fine.. The springs seem to be fine as well. I was told that if I pulled the lifters that I may not be able to tell which one is bad. Is this strue.? Thanks guys..

SilverSS

iTrader: (30)

How loud is it tapping? If the rockers and pushrods look okay then it's most likely a collapsed or stuck lifter. Mine made a faint tapping noise after a 7300rpm blast. It seemed to have gone away after a while of driving. Nice toys btw.

TransAmcoupe98

iTrader: (10)

Process of elimination, push rods and springs are down hopefully its just the lifter. How is oil pressure?

SOMbitch

iTrader: (8)

Heads have to come off to check lifters so go ahead and stick some LS7's or caddys in there when you take a peep. Sometimes you can see them chewed up and sometimes the internals have gone but it will look ok. If the lifter is visibly damaged I would look at the cam too.

A fuel injector can tick also. Try a mechanics stethoscope to pinpoint it.

JedWele

Hope you didn't spin a bearing

charlie c5

iTrader: (6)

Well, I'm pulling the motor as we speak. The push rods and springs looked ok. I used a mechanics stethoscope and the noise was more like a metallic tapping. The oil pressure was an issue way before all of this. For some reason, when the car warmed up the oil pressure would sometimes drop to "0" if I came to a quick stop. Yeah, scarry.. I wanted to change the rear main seal, and shim the oil pump, so now is a great time to do that. lol.