Facing regular noises on your car will probably be annoying, a automobile is so elaborate that it is most of the time complicated to discover its origin and even more challenging to find the component that causes it. In case you too have previously came accross a cold engine noise on your BMW 4 Series, we can definitely help you. In fact, our editorial staff chose to publish this article content in order to analyze the main causes of an engine that rattles when cold on your BMW 4 Series. First we will check out engines that is rattling only at start up, then because of improper oil and finally because of glow plugs.

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The engine of my BMW 4 Series is rattling only when starting

If the engine of your BMW 4 Series produces a cold rattles, especially when starting and which disappear rather quickly afterwards, it is possible that your engine lubrication is at fault. In fact, the oil strainer (the component that sucks up the oil and makes it rise to the top of the engine) can be harmed and therefore take 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 BMW 4 Series should return to normal operation because the lubrication of the engine will be done normally, make sure examine the condition of the engine.

Engine of my BMW 4 Series that rattles when cold because of too fluid oil

Another option which can justify an engine which cold rattling on your BMW 4 Series is that during an oil change the selection of oil was not ideal, in reality, engine oils differ on their viscosity, which we will compare 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 good enough to limit engine slamming, compare the oil used and the oil advised by the manufacturer, if your engine clicking is strong or if it persists on your BMW 4 Series, do not think twice to swap it with the right oil.

Engine that rattles when cold on my BMW 4 Series cause of the glow plugs

If you have a diesel engine, your engine is rattling when cold, and it has complication starting when it is cold, it may be your BMW 4 Series glow plugs that are defectives. In fact, a dead spark plug will cause the connected cylinder not to heat up and will cause a stronger rattles on an engine BMW 4 Series, so consider diagnosing the state of your spark plugs individually using a multimeter, it may be that only one is concerned like all of them. Here, we have described to you, the main causes of an engine that cold slam on a car, do not think twice to have a look at our page specialized to your car to find additional information on all the breakdowns related to your motor vehicle.

If you wish more guides on the BMW 4 Series, go to our BMW 4 Series category.