It's been about 2 or 3 months since I've started my car. I finally started it yesterday, and it was making a very loud ticking/knocking noise at first, then it started to quiet down after a few minutes. I'm guessing that my lifter bled down and took a while to pump back up? Is that normal? It had always seem to make a slight tick sound, I thought could have been an exhaust leak, but now I'm having second thoughts. The noise only came from No 1 or 3 cylinder. COuld the hydraulic lifters be going bad, or the pushrods be slightly short? They feel tight when trying to turn them by hand.
