Went through timing chain installation alignment procedure. Looks like timing chain jumped a tooth on the drive sprocket. both cam shaft alignment marks line up with crank at 60 degrees ATDC (should be 40). Maybe the tensioner is bad? Guess I'll need to inspect all sprockets, guides, tensioner, chain and go from there. Any advice is appreciated! Service manual says step one for replacing the timing chain is to "remove engine". Would rather not do that.