Lifters take up slack in the push rods they are able to expand and fill any gaps created by wear. They will not show up on a compression check as they open valves not close them.
A lifter tick will sound like a small hammer hitting metal, because basically it is.
If you have a sticky lifter use half a can of seafoam in the oil to unstick it.
An exhaust leak will have more pffft noise to it and not as metallic.
It is really hard to diagnose sounds over the net, if you feel lost you may need to find a knowledgeable person or take it to someone.
99 x-cab 4x4 4.0l auto
mods, cranked t-bars, silencer delete, k&n drop in, Rebuilt trans ,Trans Go stage 3 shift kit, 3200stall Fuddle Racing Torque Converter,
VANIR 63mm TB, Roush split rear exit exhuast, E-Fan, JBA Headers
Auto up/down both windows, OHC, EATC (soon to be modded)
03 Crown Victoria Police Interceptor
Last edited by Blhde; 09-20-2012 at 05:01 AM.