Why is my engine knocking?

Answer by  evers (44)

It helps to know what year make and model the car is but the knocking could be the crankshaft, rods,pistons, a bearing, wrist pins, or it could be the timing. The timing chain could be worn or a distributer could be worn. It's trial and error.

Answer by  Amber40 (24961)

The most common reason for knocking is too low of an octane fuel. It makes it hard for the engine to run especially older engines. Use a higher grade gas if it is a light or occasional knock. If it's a constant or severe knock you probably have internal damage.

Answer by  kennethjgoodson (4903)

Your engine can be knocking for a number of reasons. You can have a piston knocking or a thrown rod and it is causing the lifters to hit the valves to hard and the valves are hitting the valve cover. It can be costly and almost time to get a new car.

Answer by  heather88 (1897)

There could be a number of problems with it. You should have it checked out though, so you know how much it will be to fix it or replace it. The professionals would be able to tell you more about the problem with it. They will be able to replace or fix the problem with it.