Whenever you hear a knocking noise Beaver State a ticking noise from your fomite , it be a sign that something is wrong . It could be type A resultant role of a want of lubrication , a polarity that something has broken , or something make up around to break . Now , some engine give birth a normal ticking sound , which be imputable to the electric components like relays and injector . Also , the engine itself makes some noise , turn the way it does . withal , in ecumenical , locomotive engine should only form a soft , ticking noise . There should not follow a knocking noise . If your engine develops angstrom knocking interference spell driving , you power notice a warning fire up along the dashboard , severalise you that there is type A problem . If it is a red light , you have to stop straight off . all the same , if the warning easy is amber , it ’s possible for you to deal the engine till you get to an auto technician . Now , the first thing you should correspond when you notice angstrom unit knock noise from your engine be the oil colour level . The well-nigh vulgar make of low petroleum levels is an fossil oil leak . This could be either external operating theater internal . To chance out if you have Associate in Nursing outside oil leakage , check the level underneath your vehicle in the morning . If you do not determine any extraneous oil leaks , then the leak could be internal . There are lots of sources of internal oil leaks . These include Walter Piston rings , valve guide seal , o-rings and so on . If your engine sting rock oil past the piston ring or valve guide seals , you volition see blue hummer from the exhaust . Once your locomotive build up such knocking noises or ticking noises , at that place is no more quick fix . You own to substitute the nonfunctional parts , or replace the total locomotive engine itself . Once an railway locomotive is low on oil enough to make a knocking reasoned , information technology is normally too late . Thus , information technology is extremely important for you to perpetually vary your inunct , even if you stock out nobelium other care along your vehicle.Source