SCHP98ls1B4C

iTrader: (2)

I have a 02 z28 stock I purchased a few months ago. When you start it cold it has piston slap that goes away when warm but when its warm it get this awful tick. Here's a video car has 143000 miles

Warning audio loud
https://www.youtube.com/watch?v=J5jF...e_gdata_player

BAT TA

iTrader: (15)

I can't really tell from the video (laptop speakers suck) but it might be an injector. One of my injectors makes a pretty loud ticking noise sometimes. Do you have headers? A header that's leaking will make a ticking noise too.

djfury05

iTrader: (30)

Could be a slightly loose rocker tapping around.. I'd pull the valve covers and have a look. You can re-torque each rocker just in case to 22ft/lbs.

1nasty86

iTrader: (63)

might be a lifter.....

djfury05

iTrader: (30)

That too.. possibly one of them not staying pumped up with oil after it gets hot and thinned out some.

1nasty86

iTrader: (63)

143k miles and from what i can see in the vid basically a stock car id think it was time for a "tune up" ..... my moms 01 5.3 has 170ish k miles and we have had no trouble out of it.. (knock on wood) Time for a set of 243's, lifters, timing chain, pushrods and a CAMSHAFT

RedRocketZ28

iTrader: (19)

Sounds like a lifter to me.

Mazzenger

iTrader: (5)

I think lifter too. Pull your valve covers and check to see if your rockers/pushrods are tight or loose.

SVTconfused

be a good time to check your rocker tq and look for needle bearings

5_02ls1

iTrader: (20)

sounds like every other high mileage ls1 ive heard...noisy valvetrain...my old engine sounded worse than yours...