Easy enough, and while you have it stripped down a good time to replace the timing belt/tensioner and water pump, get a haynes manual £20 amazon, halfords etc or try your library as they will stock them or can get one for you, if you can't get a Seat one, a VW Polo engine is the same.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cars.