All you need to do is spray some WD-40 on the pulley with the engine running. If it's the injector problem, it has a very distinctive shut off as the revs rise, easy to diagnose. my car Hyundai h1 theta-2 petrol engine knocking noise when we accelerate suddenly. You may very well be using the wrong octane gasoline. (some describe it like glass bottles clanking together), it may be a sticky valve train. The Most Crashed Cars In America (with Statistical Data). A more and less-viscous oil than necessary would lead to a lack of lubrication, leading to noisy metal-on-metal contact. We have also seen some issues with CV axles causing an issue like you are experiencing. fuel your car requires and causes a buildup of carbon inside the engine, making the parts stick. Generally speaking, a bad drive shaft is going to create a kind of rattling or clunking sound. At idle, you might hear a low volume rattle. If it does, you know what it was! Engine mounts connect your engine to the car frame and keep it stationary. The transmission is as important as the car engine. Cruise at a steady speed for a while, and then lift your foot off the gas. Most leaks we encounter require replacement of one or more exhaust components. Post How To Fix Sagging Headliner Without Removing In Less Than 10 Minutes! I have just picked up my car yesterday and I am noticing a droning sound coming into the cabin when accelerating above 2000 rpms. If not, go to this article about the noises related to Citroen C1 noise wheels.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'mynoisycar_com-medrectangle-4','ezslot_1',107,'0','0'])};__ez_fad_position('div-gpt-ad-mynoisycar_com-medrectangle-4-0'); Finally, if you experience a noise when accelerating with your Citroen C1 and this noise which could be a cliking sound tends to reduce when you disengage (press the clutch pedal), then one of the wear parts of your clutch system may be the reason. Hitting a big pothole hard enough is enough to cause some severe damage to the engine mounts, and in serious cases, could knock the engine off the cars frame. In this case, topping the fluid will not rectify the rattling noise. So, if the inspection proves the mount is bad, get a new one and replace it. If it starts as a roar and then becomes a hum, possibly even a whine, it could be your wheel bearings. The trick is always to find the problem sooner rather than later. It could be your exhaust system. If the noise you are hearing is related to engine speed, then it can be attributed to the engine or the wheels and suspension. They come loose sometimes. If any of the bearings fail they will cause a ticking or screeching noise. It could indicate the last stage of the converters life. A Rattle Under The Car That Becomes More Pronounced And Then Dissipates, 3. If the car seems to be excessively loud in general, this is an indication of a problem. So, if you see dark lines of dripping oil underneath or on the frame next to the side mount, take it to a mechanic. The exhaust system consists of several parts that work together to reduce exhaust noise and makes the toxic exhaust gas less harmful before sending them into the environment. Why Your Car Is Making a Rattling Noise, and What to Do - RepairPal.com Hello, where this noise comes from would be important in diagnosing what is causing the noise. Simply changing your oil can also get rid of the tapping sound, as over time an engine that is neglected of maintenance will begin to clog up its oil filters meaning that a build-up of grime can again lead to a lack of component lubrication. No matter how many rattles you hear while you drive it, we can take it off your hands in a fast and fair way! Belt noise can also come when one of the pulleys the belt is riding on starts to fail. These translate to huge torque. Timing Chain #4. It can also indicate a bigger problem with the exhaust system, such as a failing exhaust pipe gasket causing a leak. Citroen C1 1.0 edition - Citroen C1 Whirrling noise | Technical matters Between that and the potential to rust, these are one of the more likely causes of rattling noise when accelerating. We are an automotive mechanic blog that helps mechanics and car users to find the most recent and accurate technical and repair information for their cars. n and metal-to-metal contact happens, which can cause a rattling noise. Cars are fine-tuned machines with several components that work in harmony for optimal operation. This in turn makes audible noises. Replacing an engine mount will cost you at least between $220 and $570, depending on the make and model of the car. May not be a transmission issue at all. All you have to do is go underneath and shake the exhaust around to see if you hear any metal-on-metal clanking noises. Typically, adding more fluid is all you need to fix the problem if low fluid is the cause. To do this, we will first see what are the reasons of a high pitched noise when accelerating with my Citroen C1, then what is a whistling or ratling noise at the acceleration of my Citroen C1, then the sources of a noise that intensifies during acceleration and finally a noise that ceases when I stop accelerating. I have a terrible sounding rattle (gravelly?) Another good indicator its the heat shields is if you hear a somewhat loud clanking noise as you go over a speed bump. The cost of fixing damaged heat shields will be a couple of hundred bucks ($200-$300), and you may even get it done cheaper if its not too damaged. Is the noise youre hearing different than what youre accustomed to? Meanwhile, it is best to replace damaged components. What Are the Reasons for Rattling Noise When Accelerating? If the wrong oil has been used within your car, the lubrication of the many moving parts within the valvetrain will be altered from the conditions that the components are designed for. you may hear them when you start your car, when you drive it or when you apply the brakes. Specifically when you feel a noise when you accelerate on your Citroen C1. If any of these components are damaged, itll cause rattling noise once you start the engine. On the other hand, if the tappet adjustment is too tight, the valves can stay open slightly too long, meaning much more heat is transferred through to it than its designed to handle which can cause chips and cracks in the valve. A heat shield wraps around a car exhaust manifold. This is sometimes caused by using the incorrect octane fuel your car requires and causes a buildup of carbon inside the engine, making the parts stick. I'd be far more concerned about the bottom pulley falling apart because if that happens it'll more than likely cause the auxiliary belt to get caught in the timing belt followed by the tinkle of bent valves,,,,,,,,,,. When something rattles, it is out of place, and with all that power being exerted in the engine, well, you see where Im going with this . Also, please listen to the sound carefully. All is explained in detail in this video. If the mounts are damaged, the engine will feel as if its bouncing off. If you perceive the engine hot rattles on your Citroen C1, and this noise is based at the top of the engine, it denotes that it comes from your cylinder head and its accompanying parts. How to fix the rattling noise when accelerating? The bearings are what allow the cam and crankshaft to spin for thousands of miles and millions of revolutions. Damaged valve train. However, if your vehicle is totaled and you don't have comprehensive or collision coverage, you may have to pay for a replacement vehicle out of pocket.