what engine?
Could be caused by bad lifter, bad pushrod, bad rocker arm, bent valve, or if the sound is heard deep down, it might be worse. Either way, the valve covers need to come off for inspection.
sounds like you ac compressor is about to crap out.
A hole in the muffler would cause a knocking sound in your muffler. A loose exhaust pipe can also cause a knocking noise.
It sounds like your CV (Constant Velocity) joints are worn and need to be replaced
might be a simple fix as adding antifreeze. sometimes when ur radiator is low enough it wont let the heat heat as much or at all.
u knocking on it
Are you sure it's water? Sounds like your heater coil may be leaking...
Yes
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..
What can cause a 1195 Oldsmobile to idle rough?
It could be a "CV" joint, wheel bearing, ball joint, strut or any of a number of loose parts. It depends on the type of knocking and how it sounds. In any case, it should be repaired as soon as possible to avoid the possibility of a dangerous condition.
No.