Well I got crappy lifters in my engine IMM built for me and have a bad lifter or lifters. I noticed every time I crank the engine up after it has been sitting for a short while the lifters would clatter :(
I emailed Brian and he said "Usually over-revving or overstressing the lifter will do this also to a completely normal lifter so hard to tell."
The engine has around 40 miles on it and I can tell you I have not over revved the engine because the fuel sync has not been set and the proper tune has not been applied. I have not even got close to giving it the gas. Also I'm not one of those guys that just revs a engine at high RPMs while in park or neutral.
It's not a exhaust leak since sometimes it will not tap at all. The paper work for the engine just states "OEM lifters"
I'm thinking they are Comp Cam lifters installed in this engine.. china
So... here I go taking the intake off and switching out lifters.
I will install a known good name brand lifter like Morel, or Hylift Johnson. A lifter that can with stand stress or over revving since I like to do that don't you know. :)
While I'm in there I will change out the cam as well .. something that will perform better than what was dreamed up and just threw in there.
