If your Timing belt is still as tight as It was when replaced 2 yrs ago, then why upon start-up does it sound like someone wants out of my valvecover with a hammer? It sounds like VIOLENT lifter clatter(even after letting car sit 24hrs it still did it on start-up and with RPMs). Looked under VC and no damage/things flying around. I know to check the timing marks etc but I really think its a botched lifter, how do I go about checking them? Thankyou in advance!!