It depends on the type of "knocking noises" you're hearing. Usually knocking noises are caused either by spun or worn main bearings, or worn wrist pins. Either way, it means you need a new engine.
not enough oil in the engine.
Typically a single pop followed by some hissing. If you continue driving there may be popping or knocking noises as you ruin the engine.
after market oil filter have been known to cause engine noises in kia's
Yes, just about any worn suspension bushing or other wearable part can cause that type of noise.
Bad bearing?
Worn or loose strut bearing (holder)
There are 2 typical noises that can be called knocking with the engine cold, that descreases or goes away when warm. The first is a minor problem, but still should be corrected before it creates a big problem - one or more hydraulic lifters "stuck"; as the oil heats up this can often clear itself up. The second is a more major problem, and that is connecting rod knock, usually indicating the bushings are bad and will eventually lead to destruction of the engine if not fixed. There are other noises that change with temperature, but these are the most likely ones you have experienced.
need a new engine most likely. driving dry or on low oil for a few miles will cause that..it will be cheaper for you to just get a used engine with lower miles from a junk yard than taking it apart and rebuilding it..
You may have a corroded fuel pick up line or a fuel pump that is in need of replacement
are you sure the noise is coming from the transmission. most cars will make a knocking sound due to the lifters being a little stuck. to see if it is a lifter noise, at the net oil change use a qt of lucas oils. there will be one that says something about lifter noises on the front, found at any parts store
Blue smoke is oil burning. Loud noises in the engine means internal engine problems. Time for a complete overhaul of this engine.