Engine Problem!, Want to see wat you guys might think it is Options

[Rook]

Ok. My Celica's leaking a little bit of oil. I checked the engine and found a small leak out the back from between the head and the valve cover. So far ppl have said its the head gasket. The engine also sounds rough at idle. And when its cold (which it doesn't get very cold here in Houston), the engine goes up to 2000 rpm and sounds weird. I'm pretty sure it is the head gasket but also figured i'd try to see if someone could give me their opinion. Another prob is that i'm not sure if it would be only the head gasket. haha i tried to explain the problem as best as i could. So...any suggestions?

[JDM_Factory]

you can buy engine degreaser that is safe on sensors and other electrical stuff at your local auto parts store.

If you have oil leaking between your head and your valve cover, that would be the valve cover gasket. It's a $10 part that can be easily replace.

If you suspect a HG problem, you can check your radiator fluid to have any mixture of coolant and oil. It'll look milky like from the cap, another way of check is doing a compression check. You can buy a compression tester for about $30 at your auto parts store and ask from there.