Facing repeated noises on your car is likely to be distressing, a motor vehicle is so complicated that it is generally complicated to locate its source and even more complicated to find the part that causes it. In case you too have previously faced a cold engine noise on your Mercedes Classe A 3, we can certainly support you. Indeed, our team chose to compose this article content in order to inspect the main causes of an engine that rattles when cold on your Mercedes Classe A 3. First we will take a look at engines that is rattling only when turned on, then because of unsuitable oil and finally because of glow plugs.


The engine of my Mercedes Classe A 3 is rattling only when starting

If the engine of your Mercedes Classe A 3 makes a cold rattles, specifically when starting and which fades before long afterwards, it is possible that your engine lubrication is responsible. Indeed, the oil strainer (the part that sucks up the oil and makes it rise to the top of the engine) can be harmed and therefore take some time to make the oil rise when it is still very viscous. If this is your situation, after a few tens of seconds the engine that slams your Mercedes Classe A 3 should return to normal operation because the lubrication of the engine will be done naturally, remember to examine the condition of the engine.

Engine of my Mercedes Classe A 3 that rattles when cold because of too fluid oil

Another possibility which can explain an engine which cold rattling on your Mercedes Classe A 3 is that during an oil change the selection of oil was not ideal, in fact, engine oils differ on their viscosity, which we will review with the “W” value, the higher this value is the thicker the oil will be and vice versa. If a too fluid oil has been picked, it is possible that when cold, the lubrication it allows is not adequate to limit engine slamming, compare the oil used and the oil recommended by the manufacturer, if your engine clicking is strong or if it persists on your Mercedes Classe A 3, do not be reluctant to swap it with the right oil.

Engine that rattles when cold on my Mercedes Classe A 3 cause of the glow plugs

If you have a diesel engine, your engine is rattling when cold, and it has difficulty starting when it is cold, it may be your Mercedes Classe A 3 glow plugs that are defectives. Indeed, a dead spark plug will induce the linked cylinder not to heat up and will cause a stronger rattles on an engine Mercedes Classe A 3, so take into account testing the state of your spark plugs individually using a multimeter, it may be that only one is involved like all of them. Here, we have listed to you, the main factors of an engine that cold slam on a car, do not be reluctant to have a look at our page dedicated to your car to find more info on all the breakdowns related to your automobile.

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