Please take 55trucker's advice seriously. I will be doing the timing chain on both of my W's. Not nearly as many miles as yours but chains do stretch and it all begins with the chain. My 91 LQ1 International coupe is not running. The dealer is saying it's due to the chain being off. I've retimed everything already thru the belt but since the chain is off, it doesn't matter, mine still won't run after the fact.