My car is a 02 z28 a4 camaro with 80k. when i start my car its running normal until it gets around 160 degrees. A tapping noise starts to sound in the engine. when i rev the car to 2k or 3k rpm's a few times the noise stops but comes back after 30 seconds or so. could it just need a engine flush. the type of oil i'm using is mobile 1 5w30. what do you guys think. what type of oil additive do you guys use

 

sounds like a lifter going south. when you are reving the engine it increases oil pressure thereby helping to pump up the lifter. you may also have a bent pushrod which pretty common.

 

i wonder if that's covered under the warranty. the warranty doesn't expire till april '08. i'll get mr. goodwrench to check it out

 

ya maybe drain all the oil out, run it for a good hour or so until you realllllly start to hear that tapping. then take it to mr. goodwrench and get a brand new ls1

 

hahaha