Add a cheater pipe to your breaker bar if you can’t get it loose. You will need to use a breaker bar such as Neiko 00206A 1/2 Inch Drive Premium Breaker Bar, 24″ Length | Cr-V Steel to get this bolt loose. Next, use a 27 mm socket on the bolt to loosen it up. You will use the harmonic balancer tool to keep the crankshaft from turning. You will need to use Mercedes harmonic balancer tool to hold the crankshaft pulley in place as you loosen up the 27 mm bolt. You must place a socket on the belt tensioner and pull it until you can slide the belt out. Here is a video on how to replace the viscous fan. To remove the fan, you will need Mercedes-Benz viscous fan tool. It must also be removed if you have a pre-2000 Mercedes-Benz equipped with a viscous fan. Before you pull the radiator fan upwards, unplug the electrical connector. There are clips on the side of the fan that you need to press and pull out the fan. This is required as there isn’t enough room for you to hold the harmonic balancer in place and, at the same time, use a socket to remove the bolt. On most Mercedes-Benz models, you must remove the radiator fan and shroud. Next, lift and secure the hood in the upright position. Go to the front of the car and pull on the hood handle. Pull the hood release on the lower left corner of the dashboard. It can be removed with the engine in place. The good news is that you don’t need to drop the subframe or remove the engine to replace the harmonic balancer. Price Disclaimer Instructions on how to replace harmonic balancer The good news is that the engine doesn’t need to be removed, and a DIYer can replace it.īecause the crankshaft pulley drives the serpentine belt and all the accessories, including the water pump, alternator, power steering, and a/c compressor, if it fails, you won’t be able to drive your vehicle. It also helps to absorb some of the engine vibrations by using rubber elements between the crank pulley outer ring and the center of the pulley.ĭue to heat, the age of the vehicle, and normal wear, the rubber fails, causing excessive crank pulley vibrations and even catastrophic failure in some cases. Its main purpose is to spin the serpentine belt. Both are metal and are joined by a rubber damper. The outer ring drives the serpentine belt and the center of the crank pulley. The harmonic balancer has two metal components. It is connected directly to the crankshaft. This is a common problem on Mercedes-Benz models ending with 240, 320, 430, and 500.Ī harmonic balancer (a vibration damper or crank pulley) is the main pulley that drives the accessory belts on a Mercedes-Benz engine. These two engines are installed on many Mercedes-Benz models manufactured between 19, including E-Class, C-Class, S-Class, and ML-Class. This is a common problem with Mercedes-Benz equipped with the M112 and M112 engines. that might be due to a worn belt, not a faulty component! If your C230 is one of those Mercedes-Benzs that shrieks horrendously when it runs, you likely have a worn belt, bad tensioner or both.This tutorial covers common harmonic balancer/crankshaft pulley problems and instructions on replacing them. As such, you may experience a dead battery, difficulty steering, overheating, etc. Not all vehicles have a timing belt (they typically have a timing chain instead), whereas all modern vehicles have a serpentine belt. Since the timing belt is deeper in the engine, it is often much more expensive to replace than the serpentine belt. The timing belt will often drive the water pump too. Serpentine belt vs timing belt? The timing belt connects the crankshaft to the camshaft, thus making sure the pistons and valves are operating in the correct sequence. The serpentine belt in your C230 connects your engine to many of the components you use every day such as your air conditioner, battery (via the alternator), power steering and cooling system - a quick look at the serpentine belt diagram outline all of the components feeding from it. Check out our parts page for coupons on new belts for your C230! Most vehicles do not need a special serpentine belt tool, but rather a 1/2" breaker bar and a socket on the serpentine belt tensioner to relieve the tension from the belt. Depending on your engine, the serpentine belt replacement cost is between $100 and $200. Worn serpentine belt noise in a C230 can indicate impending problems if ignored, while typically being fairly cheap and easy to replace. The video above shows how to check the serpentine belt on your 2003 Mercedes-Benz C230 - if it gives more than a half inch when pressed, is cracked, frayed or appears shiny, you should change it (or have it changed) immediately.
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