What could be more distressing than noises when you start your vehicle… Indeed, you plausibly already heard noises when you start your Lexus RX and generally it’s frustrating. It may not be anything serious, but each new engine starts usually will turn into a scary moment during which you don’t know if your engine will start. That is why our editorial staff has made the decision to compose this content to help you find its origin. To do this, first, we will see the case of noise when starting on Lexus RX but the vehicle does not start, and finally, the noise you can encounter on your vehicle if it starts, first cold and then hot.noise-when-starting-lexus-rx

I experience a noise when I try to start my Lexus RX, but the engine doesn’t start

I find out a clicking noise at the start of my Lexus RX

If you experience a noise when you want to start your vehicle, and it does not want to turn on, it is likely that it is the battery that is triggering the issue. Indeed, if you experience clicking noise when you start your Lexus RX, and it sounds like a ticking, you almost certainly lack the energy to run your starter, test your battery with a voltmeter and replace it if necessary. In the event that after checking your battery, you still know a noise when starting your Lexus RX and it does not want to start, read this article about starter motor noises on Lexus RX for more information and to discover the source of your issue.

I notice a noise when I start my Lexus RX but the engine it starts

I experience a noise when I start my Lexus RX

  • Grinding or squealing type noises when I start cold Lexus RX :
    If you experience a noise when you start your Lexus RX, and this noise sounds like grinding or squealing noise, which can also be linked to vibrations, it is possible that it is the combustion of your vehicle that is involved. Indeed if you have an air/fuel mixture that is not good the normal operation of the engine will be altered. Examine the condition of your injectors and air intake system. For more information on the source of injection-related noises on Lexus RX, see this content page.
  • Cold start friction parts Lexus RX :
    If you experience cold friction noises on Lexus RX, it is pretty much sure that they come from one of your belts. Either the serpentine belt starts to wear out and therefore causes a friction noise. It is also possible that the tensioner roller or damper pulley is worn out and that as a result the extension belt triggers a friction noise, often when cold. Visually check your belt and replace it if needed. If you have other friction noises, and it doesn’t come from your serpentine belt, we have a full article on engine of your Lexus RX.

I experience a noise when starting my Lexus RX even when hot

  • rubber mount / silent bloc dead motor
    If you experience a clacking noise just as you start your car’s engine and it is more than 100,000 km long, it is possible that some of your engine silentblocks or rubber mounts are expired. And the huge vibrations produced by starting the engine can produce starting noise on Lexus RX. Examine their condition and change them if needed. Consult this article if you would like to have detailed information on rubber mount noises on Lexus RX.
  • Motor flywheel
    Finally, if you discern a noise that sounds a little like a crank noise when you start your Lexus RX, even when hot, it is possible that if your series is equipped with a dual-mass flywheel, it is the source of your problems. Indeed, these parts have created a lot of problems on many vehicles. When they take part in the game they produce noise when you start your Lexus RX and when you turn off the engine. Have his condition checked by a professional.