Possible cam chain tensioner has broke.these tensioners are none adjustable and sometimes brake causing a knocking sound in the motor
eather a blown head or a bad rod
Driving at 50mph or above what causes a loud knocking clicking sound during acceleration?
low oil and a loose piston skirt
a dog
counterbalancer is bad
Mine did the same, mine was a motor mount.
You forgot to let your wife in
Sounds like a piston hitting the cylinder head. A lifter will usually tick, but a piston will sound more like this knocking noise.
Your rear tire could be making a knocking sound for a number of reasons. You could have a damaged strut or axle that needs replacing.?æ
Could be a worn CV joint
Gearbox oil needs changing.
It's really hard to understand what you're asking here."What causes a knocking sound when your car drops into a hole while driving?"If that's your question, I imagine that it would be the sound of your car dropping into a hole.