Hi Guys,

So I've been having a knock or rattle on startup. This has been going on for months now. At first it happened every once a while, which is why I waited to try to catch it on video, but more recently it happens just about everytime I fire 'er up. For the longest time, my personal hypothesis was stretched timing chain and/or camshaft phase actuators. Then I thought it may just be a faulty starter/starter solenoid, then a worn-out dual-mass flywheel, then back to the timing chain...

Knock On Startup