megane 1.6 vvt cam belt and dephaser change

hi im new on this sight I have just bought a 53 plate megane 1.6 vvt with 83k on the clock .I need to do the cam belt as im unsure if its bean dun before .but this is the first Renault iv owned and now very little about them .my question is .Is there timing marks on the cams and on the crank .ill be doing it myself and the dephaser as that makes one hell of a noise on start up . gave here a full service last night with engine flush made no difference at all .I have dun belts before on my other cars I have owned ..If some one could advice me on how to do it id be very happy picks would be nice lol ...thanks in advance .Daryl