No. It is not normal at all. Go to a mechanic and get their opinion. Engine knocks usually signify severe damage, and driving with it will cause even more damage. Always check your oil as well. Make sure it is clean and topped off. knocking can also sometimes mean you have the wrong octane but most of the time it means your tie rods or connecting rods are worn
A knock at idle however can only be bearings, it would be beneficial to get things looked at right away,
owners manual say it could be normal,but carbon on pistons from my experience also cause knocking,when I remove carbon knocking stops,I have corolla with 1nze engine.
an idling diesel engine or snoring :]
Lifters or valves.
NO it will not. If you have a knocking sound then you have trouble inside of the engine.
When the fuel in an engine cylinder ignites prematurely or unevenly to cause power fluctuations and a "knocking" sound. usually occurs when an engine is very how or improperly timed.
Engine rod? Engine bearing?
Engine knocking can be caused by numerous things. Having the incorrect spark plugs, carbon deposits on the cylinder walls, and being low on engine oil may all cause a knocking sound.
Get it fixed.
Bad bearing or rod
counterbalancer is bad
Mine did the same, mine was a motor mount.