I recently bought a 2005 deville with 145,000 miles on it. It has been taken excellent care of all service records and receipts in glove compartment, never even late on an oil change, It broke down on the original owner and someone told him that the motor was going to have to be replaced so he got rid of it. I bought it for 800 hoping it did not need a motor he just had new tires put on that costed more than i gave for the whole car. I thought as good as he took care of it that it couldnt be the motor. I was hoping for a sensor but no such luck. so i started into the motor and when i took off the right side cam cover the timing chain was slack on top the left side was tight. When i got the front cover off there was lots of pieces of the plastic guides in the bottom. now wnen i rotate the motor to align the marks on crank and intermediate gears to 12 and 6 o clock the cam gears on the left side are both at 12 o clock but the right side is not. they are around 7 and 5 o clock. with chain off should i move them manually to where the should be and put new guides and tensioner on or what?????