Lately I've been getting a tick, tick, tick only when the rpms reach anything over 3k and typically NOT while under load. If I keep it at say 3500 rpm, I get a constant ticking.
I know what you're probably thinking - lifter tick, right? I actually don't think it is. I had lifter tick for months but that went away a few months ago when I had the 2nd gen lifters put in along with a full 120k service (timing belt, accessory belts, oil pump, etc, etc, etc). This ticking is about as loud as lifter tick but sounds slightly different and I think it's strange that it only happens after 3k rpm. Also, if it starts ticking and then I accelerate, the ticking seems to stop until I let off the gas - then it comes right back (assuming I'm still over 3k rpm).
I was wondering if this could possibly be some contact between the pistons and the valves. I really hope not... I've got a data logger hooked up and the timing seems okay (I think) but maybe the valves are sticking a little bit?
This may have something to do with it: Just the other day I noticed the oil was about a quart and a half low
I hadn't noticed any leaks and the pressure seemed normal so I hadn't thought to check it. I had my oil changed maybe a month ago with some synthetic (or partially synthetic) Mobile 1 5W30.
Alright, I could go on and on... If there's some more info I can give you that would be helpful, please let me know. I could take a vid, post logger data, etc. Thanks in advance for your help!