Time to YouTube how to replace a head gasket. It’s not super difficult and wouldn’t cost much in parts. The dealer is charging you $150 per hour labor.Update: Dealer says oil pressure dropping to 20 psi is totally normal. And the tick is from the exhaust manifol . No issues there, they also told me that I have a blown head gasket and its gonna be $1,700 to fix. I may just part the thing out.