Having a care in good conditions appears to be a vital requirement for most of us, as we are all dependent on our vehicles, it doesn’t matter if it is to go to your job or for personal reasons. So when we observe something different about our Mercedes Cla, we logically tend to ask ourselves questions. If, in your case, it’s your engine that rattles when hot on your Mercedes Cla, you’ve come to the right place. We understand that this is a repeated problem and so we have decided to produce a dedicated document to help you deal with it. For this, first we will look at the problems linked to hydraulic tappets and valves, then at combustion problems, and to finish at the engine rattling when hot because of concerns linked to the lower engine.

hot-engine-rattling-mercedes-cla

Engine rattling when hot on my Mercedes Cla because of the hydraulic tappets

If you perceive the engine hot rattles on your Mercedes Cla, and this noise is based at the top of the engine, it involves that it comes from your cylinder head and its accompanying components. There are two possible triggers of an hot engine rattling on a Mercedes Cla. Either the hydraulic tappets, ordinarily it is because of their faulty “hydraulic catch-up” system that you will hear these clicking noises, often when hot and not when cold. Otherwise, it is the play of your rocker arms or their state of wear that is accountable. In such a case, reflect on replacing them.

The engine of my Mercedes Cla is doing some rattling noise when hot because of combustion problem

Second possibility, if you have the feeling that the hot engine rattling is linked to the combustion of your engine, there are three possible triggers of this one. It may be that your timing is out of sync and that it does not manage the synchronization of the different components of the engine to enhance good combustion. And finally, the most classic motive comes from your injectors, which are either clogged or damaged. Don’t hesitate to go to your repair shop so that he can check the part that seems to be the reason of your engine’s hot clicking on your Mercedes Cla.

Engine of my Mercedes Cla rattling cause of problem in the lower part of the engine

To conclude, if you have recognized the place of origin of your engine that hot rattles on your Mercedes Cla that comes from your lower engine, it may be that your connecting rods or piston pins are the origin. In both situations, the risk in the long run is engine breakage. These two repairs are particularly complex and most mechanics will advise you to replace the engine of your Mercedes Cla. In any case, don’t wait when you spot such a problem, it will enable you to foresee an upcoming big repair or at best find a more affordable remedy, rather than find yourself faced with a failure with the origin of your engine rattling when hot and the end result being your engine giving out on you when you come home from work. Don’t hesitate to check out our catalogue of items on your car that can help you fix other concerns or learn more about your Mercedes Cla.

To get more tips on the Mercedes Cla, take a look at the Mercedes Cla category.