Definition of discourse marker noun from the Oxford Advanced Learner's Dictionary
When an engine starts knocking, one of the first things a mechanic will check is the oil pressure. A warning light may come on in the car, and adding sufficient oil will solve the problem. Sometimes, a knocking noise is caused by loose torque converter bolts or a loose flywheel.
One of the most alarming of car problems, which should not be ignored, is engine knocking. Needless to say, the most important car part is the engine and a breakdown there, can result into a complete failure of car functioning and costly repairs. A bike or a car talks to you, through all the sounds and noise it makes.ngine Cycle Timing Problems. The engine cycle's rhythm can get disturbed if the spark plug firing and the fuel mixture combustion, are not synchronized. In the event that spark plug timing and combustion don't match, there is bound to be a knocking noise.