Facing repeated noises on your car is likely to be annoying, a motor vehicle is so complex that it is generally difficult to determine its source and even more hard to find the part that causes it. In case you too have already faced a cold engine noise on your Bmw Serie 1 F21, we can definitely support you. Indeed, our team chose to write this content to be able to examine the main causes of an engine that rattles when cold on your Bmw Serie 1 F21. First we will look at engines that is rattling only at start up, then because of unsuitable oil and finally because of glow plugs.


The engine of my Bmw Serie 1 F21 is rattling only when starting

If the engine of your Bmw Serie 1 F21 generates a cold rattles, specifically when starting and which ends quickly afterwards, it is possible that your engine lubrication is to blame. Indeed, the oil strainer (the part that sucks up the oil and makes it rise to the top of the engine) can be broken and therefore take time to make the oil rise when it is still very thick. If this is your case, after a few tens of seconds the engine that slams your Bmw Serie 1 F21 should return to normal performance because the lubrication of the engine will be done naturally, make sure to check the condition of the engine.

Engine of my Bmw Serie 1 F21 that rattles when cold because of too fluid oil

Another option which can explain an engine which cold rattling on your Bmw Serie 1 F21 is that during an oil change the selection of oil was not best, indeed, engine oils differ on their viscosity, which we will contrast 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 selected, it is possible that when cold, the lubrication it allows is not 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 Serie 1 F21, do not hesitate to replace it with the right oil.

Engine that rattles when cold on my Bmw Serie 1 F21 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 Serie 1 F21 glow plugs that are at the end of their life. Indeed, a dead spark plug will trigger the associated cylinder not to heat up and will cause a stronger rattles on an engine Bmw Serie 1 F21, so take into account diagnosing the state of your spark plugs independently using a multimeter, it may be that only one is involved like all of them. Here, we have described to you, the main motives of an engine that cold slam on a car, do not hesitate to have a look at our page dedicated to your car to find further details on all the breakdowns associated with your automobile.

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