Kia optima engine ticking

SOURCE: oil consumption, rattle, engine noise

Check under the hood and inspect the valve cover gasket. If it's bad it would explain why you don't see any leaks on the ground because it's probably burning off on the manifold. This ticking you're hearing is a lack of lubrication to the rocker arms. Apart from the valve cover gasket, you should get under the car and inspect the oil pan and oil filter for seepage. Best of luck on your problem.
Greg

SOURCE: Loud Ticking sound 2004 F150

Check the Alternator / Powersteering belts .
One of them will be damaged and loose.
Hope this helps.

SOURCE: Loud ticking/knocking/rattling sound when I start/accelerate

hi is it miss-firing as it sounds like a knocking noise can be anything but if you can feel it on the accelerater pedal then the noise sounds like its on the inlet valve side which would transfere the noise up the throttle body where the accelerater is located it could be something as simple as a tappet come loose to a burned valve you need to have a look do a compression test and take the rocker cover off see if theres anything come loose yates210456

SOURCE: my 93 grand am seddenly

knocking in an engine is never a good thing. I'd check three things: engine bearings, valve lifters and timing chain, all of which can make noise. First thing though, is to put a mechanical gauge in place of the sending unit and check actual engine oil pressure. this will give you a good idea what is going on. low readings can be bearings, normal readings can be the other two items. I could give you a definite idea by listening, but I really can't hear it from here.!(one of the frustrating drawbacks to doing this online) An experienced tech can listen and tell you pretty much what's going on.