Getting ready to do these required tasks this week. Changing water pump, tensioner, head bolts, valve adjust etc. Don't know yet if it's a 2 piece crank hub but I'm prepared if it is. I'm wondering about the seals - crank and cam - any head's up on these? Also - I'm thinking of getting an engine flush just before this maintenance and just draining the cheap oil and tossing the filter when I get home to take it down. Is there any merit to this train of thought?