Mild clicking gone to loud banging
My 05 wrx has about 70k miles and has always had some valve noise since the day I bought it new, but this is completely different. Something is wrong for sure. Never had over head cam motor before but this sound is like a solid lifter noise times 100. Do boxer engines have hydrolic lifters? Car still runs smooth but I'm afraid to drive it.
Oh and by the way noise started after bouncing off the rev limiter a few times as I was blowing the doors off a late model acura trying to keep up with me as we drove through some tight curves.
Some bolt on mods intercooler, up pipe, down pipe, header, cold air intake, pop off valve.