i have a 2001 jetta 1.8t. recently, the water pump siezed, causing the timing belt to go. i got the pump and belt replaced, but the shop told me that the engine is toast because the valves hit the pistons when the belt blew. any idea as to how expensive this is to repair? i am keeping the car, and would like to do some mods to it once i get it fixed. rebuild or new engine?