![]() And the huge vibrations produced by starting the engine can generate starting noise on Toyota Highlander. If you perceive a clacking noise just as you start your car’s engine and it is more than 100,000 km long, it is conceivable that some of your engine silentblocks or rubber mounts are good to be replaced. I perceive a noise when starting my Toyota Highlander even when hot If you have other friction noises, and it doesn’t result from your serpentine belt, we have a full content on engine of your Toyota Highlander. Visually verify your belt and replace it if needed. It is also conceivable that the tensioner roller or damper pulley is worn out and that as a result the extension belt make a friction noise, often when cold. Either the serpentine belt starts to wear out and therefore causes a friction noise. If you perceive cold friction noises on Toyota Highlander, it is practically certain that they come from one of your belts. Cold start friction parts Toyota Highlander :.For more info on the origin of injection-related noises on Toyota Highlander, see this article. Examine the state of your injectors and air intake system. Indeed if you have an air/fuel mixture that is not good the normal operation of the engine will be altered. If you perceive a noise when you start your Toyota Highlander, and this noise is like grinding or squealing noise, which can also be related to vibrations, it is conceivable that it is the combustion of your car that is involved. Grinding or squealing type noises when I start cold Toyota Highlander :.This should prevent it from wearing out prematurely, as it won't be constantly compressed when you actuate the brakes.I experience a noise when I start my Toyota Highlander but the engine it starts I perceive a noise when I start my Toyota Highlander I advise putting the "P" shaped shim on the top. I've included pictures of these shims below. Get this kit from Warner or Bosch instead of Dorman junk. These should be paired together with 1x P shim on each side. The other 2x shims don't have this "P" edge. one shim has a "P" shaped edge, which contacts the pads, and prevents rattling. These kits should have 2x of two different types of abutment shim. One word of caution for these hardware kits: i bought a kit from Dorman, and it included 4x identical shims. they are NOT the same as the clips that go on the back of the pads. These shims are sometimes called slider shims, or anti-rattle shims. These hardware kits contain the abutment shims, as well as sometimes the slider pin boots. The noise would go away when pushing the brake pedal enough to engage the disc brakes, even when riding over bumps. The symptoms i had were that the front brakes emitted a loud "chatter" or "rattle" kind of noise when driving over bumps. These are typically included in the "disc brake hardware kit" sold by the major auto-parts sites. The issue for me was the abutment shims, which prevent the disc brake pads from moving up and down, and were worn out. It was louder with the window down, but went away completely if i was pushing the brake pedal enough to get the disc brakes to apply. My issue definitely sounded like a bad suspension issue: very loud rattle when driving over any/every bump. I believe the OP's issue is different from the one i had on my '07, but wanted to add this information to help out others. I know this is an old thread, but just wanted to chip in a few thoughts on a front end rattling noise.
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