Lifter tic

I had problems with 2 sets a couple yrs. back but even didn't tick all the time until they got really bad. The problem with them was they bled down bad overnight. The original set only lasted about 150 miles before they wouldn't pump up anymore. Comp sent me a set under warranty and they did great for about 500 miles then 1 then a couple then a few started not pumping up after sitting. I gave up and put in a Lunati cam and lifter set and haven't had any problem with them in nearly 4,000 miles. A buddy of mine also had problems on a 454 Chevy with a comp cam set the same time. But his were noisy from day one and after about 3,000 miles a lobe went flat. I've also read several other guys having problems with them around the same time. An insider told us Comp's regular USA lifter source went on strike for 2 months and they bought Chinese lifters and that's when all the problems started. After that run of junk Chinese crap it was supposedly all good.

On another note I'd check for an exhaust leak like dragonknights said cause that can sound just like a lifter tick.