I'm going to try to replace the head gasket on a 2000 A4, what am I getting into? Is there anything else I should replace while I'm replacing the gasket?

 

mainly all the other gaskets that you will be removing, why are you doing the head gasket?

 

What he said. That's not a common problem on these cars.

What motor?

 

Its a 1.8... there is water in the oil and white smoke. Car starts and runs good.

 

there is coolant in your oil? ok ( hoping that you dont have the wrong coolant in your car NO GREEN COOLANT!!!) pop open the coolant reservior, see if your coolant looks like a " milshake" it will look all oily and gross like a milk shake from the gutter

if thats the case... its not a head gasket thats your oil cooler that failed internally

 

a LOT easier job then a head gasket too if you're curious