well i am replacing my valve gasget and o Rings for the first time . I have the chilton Shot manual and it looks pretty traight forward and i am the kinda of guy that likes to get into stuff like that anyway but dont get me wrong i;m no pro motor head .. well all i wanted to know is if there is an extra tips that someone can give me before i do this maybe some do's or donts .. i was reading the sealant package it says to let it sit for 3 hours . but i am going to let it sit the whole day .. well any info would be apr. thank you