Overheating?
Rod rap?
Bad head gasket?
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.
A knocking sound when the key is turned on can be caused by several issues, most commonly related to the engine or electrical system. It may indicate a problem with the starter motor, such as a faulty solenoid or a weak battery that struggles to engage the starter. Additionally, loose or damaged components in the engine or transmission can create knocking noises. It's advisable to have the vehicle inspected to identify the exact cause and prevent further damage.
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.
Yes, a faulty oil sending unit can potentially contribute to a knocking noise in the engine. If the oil sending unit fails, it may lead to inaccurate oil pressure readings, which can result in insufficient oil flow and lubrication. This lack of proper lubrication can cause engine components to knock or produce abnormal sounds due to increased friction. However, it's essential to diagnose the root cause, as knocking noises can also stem from other issues, such as worn bearings or piston problems.
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