2016 RX 350 with about 45k on it. Hearing a rattle/clanking sound on a cold start, more noticeable once the vehicle goes into gear. I've read that the 2GR-FKS engine is a bit noisy, I've had the high pressure fuel pump replaced because that was noisy (replace under service bulletin). Does this sound like normal injector noise or something more? Thanks for any feedback.