Thread: How can you tell if a lifter is bad

i think the lifters may be bad in my 1998 grand prix can you physically see if a lifter is bad

Why do you think they may be bad? Usually "tapping" is the sound a lifter makes. In GP's this is usually because they are all bunged up from a failed LIM gasket.

Top end knock/tap that increases when the engine is rev'd

Just noticed your sig your l67 is twincharged? Do you have a build thread? More info please