Just been to VW, they want 215 squid to fix it!!!!!!!!

New Motor is 70 and they rekon 1.5 hours labour!!
Does anyone know of an alternative fix? I rekon it's the water pipe INSIDE the motor that is cracked / leaking. The motor has 5 screws, I'm thinking of undoing them and having a gander...any risk in this? Anyone?
Cheers