Having a healthy car seems to be a very important prerequisite for most of us, as we are all dependent on our vehicles, whether it is to get to work or for personal travel. So when we discover something different about our car, we logically tend to ask ourselves questions. If, in your case, it’s your engine that rattles when hot, you’ve come to the right place. We know that this is a recurring problem and so we have decided to write a dedicated article to help you deal with it. To do so, first we will look at the problems related to hydraulic tappets and valves, then at combustion problems, and finally at the engine rattling when hot because of problems related to the lower engine.

Hot engine rattling on my car

Engine rattling when hot on my car because of the hydraulic tappets

If you hear the engine hot rattles on your car, and this noise is located at the top of the engine, it means that it comes from your cylinder head and its accompanying components. There are two possible causes of an hot engine rattling on a car. Either the hydraulic tappets, in general 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 to blame. In this case, consider replacing them.

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

Second possibility, if you have the impression that the hot engine rattling is related to the combustion of your engine, there are three possible causes of this one. It may be that your timing is out of sync and that it does not manage the synchronization of the different elements of the engine to promote good combustion. And finally, the most classic cause comes from your injectors, which are either clogged or damaged. Don’t forget to go to your mechanic so that he can inspect the part that, following this article and a check, seems to be at the origin of your engine’s hot clicking on your car.

My car engine is rattling when hot

Engine of my car rattling cause of problem in the lower part of the engine

Finally, if you have identified the area of origin of your engine that hot rattles on your car that comes from your lower engine, it may be that your connecting rods or piston pins are the origin. In both cases, 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 car. In any case, don’t wait when you spot such a problem, it will allow you to anticipate an upcoming expense or at best find a less expensive solution, rather than find yourself faced with a fait accompli 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 take a look at our catalogue of items on your car that can help you solve other worries or learn more about your vehicle.