it could be the window
get a new window. or put a sealance on it.
Exhaust leaks, bent pushrod
Rear main seal
check for vacuum leaks that wull usually cause this problem
Maybe the door protector is torn and water leaks through there. if that's not the case then is could be your door has an un even opening. and that is where the water goes through
the air conditioning pump is on the passenger side thats the only thing that leaks water there
oil leaks
No, it will not cause oil leaks.
Intake manifold leaks will cause the engine to idle rough and get poor fuel economy. An exhaust manifold will have no symptoms other than the sound of the leak.
The test plug is seeping
if you have no leaks it is not a big deal to have a dent. if the dent is huge it may cause inacurate readings on your dipstick, you could remove the pan and place it on a flat surface and work the dent out slowly but this could weaken the metal for the pan.
Yes, it could. What could happen is it leaks as you are going down the road and leaks onto the exhaust manifold and creates the smoke.