Being the victim of frequent noises on your car will probably be annoying, a motor vehicle is so sophisticated that it is most of the time challenging to identify its origin and even more complicated to find the component that triggers it. In case you too have previously experienced a cold engine noise on your BMW 3 Series, we can clearly support you. Indeed, we decided to publish this article in order to inspect the main triggers of an engine that rattles when cold on your BMW 3 Series. First we will look at engines that is rattling only at start up, then because of improper oil and finally because of glow plugs.
The engine of my BMW 3 Series is rattling only when starting
If the engine of your BMW 3 Series generates a cold rattles, specifically when starting and which ends fairly quickly afterwards, it is possible that your engine lubrication is at fault. Indeed, the oil strainer (the component that sucks up the oil and makes it rise to the top of the engine) can be damaged and therefore take some 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 3 Series should come back to normal functions because the lubrication of the engine will be done naturally, make sure to check the condition of the engine.
Engine of my BMW 3 Series that rattles when cold because of too fluid oil
Another possibility which can justify an engine which cold rattling on your BMW 3 Series is that during an oil change the choice of oil was not perfect, indeed, 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 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 3 Series, do not hesitate to replace it with the right oil.
Engine that rattles when cold on my BMW 3 Series cause of the glow plugs
If you have a diesel engine, your engine is rattling when cold, and it has problems starting when it is cold, it may be your BMW 3 Series glow plugs that are nearly good to be changed. Indeed, a dead spark plug will induce the associated cylinder not to heat up and will trigger a stronger rattles on an engine BMW 3 Series, so take into consideration examining the state of your spark plugs separately using a multimeter, it may be that only one is involved like all of them. Here, we have listed to you, the main reasons of an engine that cold slam on a car, do not hesitate to read our page specialized to your car to find extra information on all the breakdowns associated with your automobile.
If you want more guides on the BMW 3 Series, go to our BMW 3 Series category.
