1999 Saturn SL2 weird clicking from the engine?

What color smoke come's out the tail pipe?Also when do you see it idle etc?Where is the ticking coming from?Under the valve cover?

If you have oil leaking where the transmission and engine meet and you already resealed the oil pan then most likely the rear main is leaking. As far as the clicking I would see if your canister purge solenoid is clicking that is on the back of the block by the starter. Does the smoke look like oil or steam?

Pull off one spark plug wire at a time with it running and see if the noise goes away becareful not to get shocked.

That mean's that you have a problem with your rod or piston on that cylinder.

Most likely your rod bearing is starting to spin. If you keep driving it you could damage your crank. You would have to remove your oil pan and pop off the rod cap and have a look at the rod bearing. If you don't find your problem there then you will have to dig deeper. With the smoking and the knocking looks like your motor isn't doing to hot.

It's going to be your rod bearing or where your rod connects to your piston. Or it could be the piston itself slapping in the bore. You would first have to remove the oil pan no special tool's need there and inspect the rod bearing rod and crank.I couldn't even begin to give you a price of what it would cost to repair. Because I don't know if the crank is damaged or rod damage. If nothing look's bad on the bottom end then you would have to take the head off and pop the piston out and have a look there. If you were to take it some where your looking at like 4-5hrs time's 80-100 per hr?For tear down to start for checking the bottom end plus part's. The sky's the limit from there and you still will have a smoking car.

There you go.

1. Remove the front exhaust pipe.

2. Remove the engine stiffening bracket and flywheel cover.

3. Remove the right-hand side tire, splash shield and vibration damper.
4. Loosen the four front motor mount bolts. Back out the bolts approximately 12 mm (1/2 in.).
5. Drain oil.
6. Remove all the oil pan bolts.

IMPORTANT: An 8 mm flex socket can be used to access the rear oil pan bolt heads next to the flywheel on vehicles with manual transaxles.

7. Pry the front engine mount away from the cylinder block to allow for oil pan removal.

8. Drive the RTV removal tool sharp edge between the pan and block.
9. Drive the tool around the pan, shearing the seam. After the pan is loosened, use a rubber mallet and bump the pan sideways to loosen it.
The picture's are on a pay site i enhanced them for you sorry about that.