I'm a long term member but haven't posted in a while, please be gentle . Can move onto another similar thread if need be...
No idea how to embed videos but I've uploaded the clip to youtube which shows the noise here Oh so it embeds itself these days haha -
Doesn't sound like it's spun a bearing but after a bit of investigating to me it sounds like it's possibly noisy lifter/s. I had the motor fully rebuilt a while back, it has forged CP pistons, Tomei poncams etc...I don't believe it has always made this noise but literally can't remember how long ago it started. It is only obvious on start up after initial warm-up higher revs, once you rev the motor higher it's pretty much drowned out by the noise of the exhaust.
I don't see it as a bottom end problem as the car runs fine, holds boost with no issue, doesn't misfire yada yada. To those on here more mechanically minded, would this most likely be lifter noise? After watching videos of spun big ends I couldn't compare it, but watching other lifter-related clips it sounds damn similar. When the motor was rebuilt I couldn't answer if the lifters were cleaned but to save people asking that, I'll go with no.
If it is lifter noise, what's the best/easiest way to determine it? Not hands on enough for me to remove/clean/replace myself, so parts cost aside any ideas on what sort of labour costs a job like this would be? Doesn't seem overly complicated but just time consuming, which is where workshops make most of their money lol
Thanks in advance Nathan