ok so i blew the gasket on the timing cover. my mechanic wants 500 bucks to fix it so you know what that means, im doin it myself, like always... i just did my water pump so i was already half way there, my question is, how much harder is it gonna be than the water pump? and could someone give me a link to a place with detailed instructions please? oh yea, and the water pump took me about 7 hours, how long should this take?