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! The mechanic will replace any defective component to address the rattling noise. If its the engine mounts causing the rattles, its likely that one is causing the rattling sound, but the other three are similarly worn out. It could also mean a whole host of things inside the gearbox. A ruptured mount will leak fluid everywhere. If youre driving an automatic, your transmission could be experiencing problems engaging the next gear. How severe the consequences of ignoring this rattling and continuing to drive will depend on whats wrong. Rattling Noise When Accelerating: What's Causing It? - Motor Verso Lift and support it with a jack stand. Any of the components in the drivetrain can wear and start to make noise. A lack of lubrication can also affect the rest of the valvetrain in the same way, with rocker arms, pushrods and valves clanging around the engine due to oil starvation. For a better experience, please enable JavaScript in your browser before proceeding. Worn-out spark plugs or the electrical cables attached to them are one of the most common causes of cars stuttering. Many of the noises we talked about dont pose a direct safety concern, but the end result could be the vehicle abruptly stalling. Loose Exhaust Or Muffler Rattling Noises Coming From Your Engine Bay #1. I have replaced belt and full car service done but still same issue. In my spare time, I'm either working out, reading the book, or spending time with my family. I'm waiting for now but will get more vocal closure to warranty expiring hoping that they'll get this figured out. We recently created this blog site to enable us to share our knowledge with other automotive mechanics and car owners. Using a feeler gauge to wedge between a rocker arm and the valve stem, a factory setting can be found through a workshop manual to adjust the valve adjustment screw to the correct clearance. A Rattling Noise And Roar That Gets Louder When Accelerating A roar could be a frightening thing. Hello, where this noise comes from would be important in diagnosing what is causing the noise. If loosened bolts are the cause, tighten them properly. It doesn't take long until it gets much, much worse. There are so many urban myths about higher octanes and lower octanes, higher performance, and better fuel efficiency. This can also be caused by having the wrong motor oil (or old, gunky motor oil) thats not lubricating the valves correctly. If you hear a grinding sound or noise coming from the transmission as the vehicle accelerates or decelerates while the clutch pedal is out, it may be coming from the pilot bearing. But before you touch any exhaust components, let the exhaust cool down to avoid burning off your hand. A roar could be a frightening thing. But if a stretched timing chain is the culprit, budget $400 to $1,500 to replace it. This depends on whats wrong with the car thats causing the rattling noises. Always be aware of your surroundings while driving; if your car is making abnormal noises, including only while accelerating, you should have it inspected as soon as possible. 10 Causes of Rattling Sound When Accelerating - carcody However, the noise will become louder or more noticeable as you accelerate the engine. An unfortunate fact about catalytic converters: they are commonly stolen because the precious metals inside them are worth a lot of money. See your mechanic. I also just got new tires mounted and balanced - no change in the engine rattle. If the noise you are hearing is related to engine speed, then it can be attributed to the engine or the wheels and suspension. Rattling Noise When Accelerating (Causes & Solutions)