If the lifter bore was tight, or there is crap in the lifter contaminating it, you will not fix it with lighter oil.
Verify lifter bore was not warped and the lifter can rotate. If it was stuck during break in, the spring is heat soaked and the valve in the lifter could be contaminated.
My lifters were not stuck. Only 1 seemed slightly tight and it did not get wiped. Go figure.
If the flat tappet did not rotate during break in, the damage is done. The Comp cams card specified 1/8th turn, NOT 1/2. I went 1/4 because it seemed too soft on the plunger.
I posted videos from a cam machine shop proving the billet steel coming form the largest cam shaft casting blank manufacturer which Comp uses, is sending out cam blanks with sub-standard heat treatment.
The lifters failed Rockwell testing as well. Comp need to step up and stop burning the affordable flat tappet market by forcing the supplier to meet QC standards.
All the money went to LS technologies.
Bad move unless you want double to rebuild cost. The market is corrupt.
My new lifters are roller and are at 3/4 turn because we tested the range and do not want to adjust after start up.
I did up the pushrods to Engine Pro hardened rods, despite not supposedly needing them for a mild roller engine.
My Comp hardened flat tapper rods were erased like a pencil at three ends.
The oil guy on youtube has convincing proof 1/2 the zinc bottle reduces excessive wear. Too much zinc complicates the poor machine quality of imported parts. If they were dirty out of the box, extra zinc makes it worse.
I'm done with flat tappets.
My engine was ruined with Comp cams high energy lifter, hardened push rods and a flat cam.
Worst damage cam my friend ever seen in 30 years of high end diesel engine and transmission repairs.
Hoping you have better luck than I did, with the same symptoms.
Will never install any lifter without personally disassemble, micro-pollish and clean every internal myself. Never.
After what found in my brand new Comp lifters, never again.
The used roller lifters installed were full of crud and the compression range was significantly improved after a thorough cleaning and scrubbing.
My plan is to replace them with Cadillac rollers at 50k.
Good luck with your engine!
