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if it sounds like the knocking is coming from the bottom of the engine i would bet it was the rods or rod bearings may be worn. if the knocking is on the top ,then i would have the lifters and or the rocker arms checked.
If its a legitimate knocking then you would want to go with head gasket if its a tapping you would be looking at a valve
Having a bad rod bearing could cause a truck to make a loud knocking noise and shake when driving at high speeds. The engine having a coolant leak or an engine timing problem could also cause the knocking noise.
Driving at 50mph or above what causes a loud knocking clicking sound during acceleration?
if the engine is knocking really loud you probably need to overhaul the entire engine or get a new or used engine because loud knocking is not good
A loud knocking noise in the motor of a car at high speeds is most likely the engine. There could be another issue with the transmission if the knocking only happens at high speeds.
my car engine is on but with a loud knocking noise but when i apply some gas it does not move at all. my car is an automatic civic.
No
you may have a rod knocking and you need to take it to a shop asap
Bad bearing or rod
A little kid in the trunk with a hammer
If it is the clutch and not the transmission. The face of the clutch disc may have come off. Dumping the clutch too often can cause this, or can "just happen". It may be packed against the bell housing and hitting the pressure plate. Pressure plate may have lost a spring when the clutch went and it is hitting. You will know when it is taken apart.