Chevrolet Suburban Camshaft Lifter Replace/Remove

My Suv Suddenly Started Making Clicking Sound . Quite Loud. Took It To Dealer And They Say I Need Camshaft And Lifter Replacement. How Do...

Had A Bad Lifter On Cylinder 7. I Replaced All Lifters Now Cylinders 3,5,2,8 Are Not Getting Oil To Rockers.

Just Installed A Rebuilt Engine And Water Was In The Oil And Lifters. Thought I May Not Have Torqued The Headbolts Correctly, So I Redone...