i have a 2002 f150 supercrew larit i have been geting a noise sounds like exhaust leak but once engine warms up it goes away and i notice the bottom of the oil fill cap has a milky look to it any one have any idea as to what this could be im thinken head gasket any help would be helpful thanks

 

Its normal to get a little milky residue in the oil cap, especially if the truck is driven a short distance all the time. If you pull the dipstick and there is a milky residue on it or if you drain the oil and it looks like a milkshake then you have a problem.