Crankshaft gasket for different automobiles
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Your Crankshaft seal (crankshaft gasket) worn out? » Read more about common malfunctions • Repair • Replacement manual
Keep the flywheel clear of oil with the radial gasket The radial gasket, also referred to as crankshaft seal, seals off the crankshaft at the case. It is required to prevent oil from escaping at the rotating shaft. Radial gaskets, also referred to as "oil seals", have proven and established themselves for this purpose. The factory-provided radial gaskets at the crankshaft are of the highest quality, for their replacement is very expensive. Sealing rotating shafts with oil seals Wherever shafts push through the crankcase, they create a challenge of preventing the lubricant of the interior mechanics from leaking out. The development of the gaskets has brought forth numerous solutions for this purpose. The crankshaft seal is the most commonly used component in vehicle technology. The oil seal consists of a sturdy ring made of rubber and plastic. The seal ring has a hole in its center, through which the respective shaft is stuck. Yet, to ensure minimal friction between the shaft and the seal, the contact surface is realized by nothing more than a thin lip. At highly stressed sealing points, such as is the case on a crankshaft, this lip is reinforced by means of a spring. It constantly serves to tightly press the lip onto the shaft. A small part of the lubrication is also used to minimize the friction between the shaft and the seal. Grooves in the shaft provide the oil in such a manner, that it cannot escape to the outside. Crankshaft seal defects A defective radial gasket is aggravating and expensive. Depending on the vehicle, the entire engine must be removed for this repair. If the radial gasket is leaking, you will not only fail your general inspection, but possibly also suffer additional and grave damage as a result of oil leaking from the crankshaft. On the clutch side, an unwanted oil film seriously decreases the effect of the clutch. In the worst case, this will make the car near impossible to maneuver. At the side of the pulley, escaping oil can result in auxiliary units not being properly powered. The consequences include stiff steering due to the power steering pump not creating enough pressure. Furthermore, the alternator may no longer sufficiently charge the battery and the water pump no longer works, which can result in the engine overheating. Yet, oil leaking onto the toothed belt wheel is the most serious consequence. If the timing belt becomes oily due to a defective radial gasket, it could skip at any time. Tearing or slipping from the guide is also possible. If this happens, a piston will hit an outlet valve, leaving the engine with massive and very expensive damage. Therefore, repairing the radial gasket must never be neglected. Repairing the radial gasket The radial gasket is located on one of the crankshaft openings. In any case, there is an oil ring on the side of the clutch disc. In vehicles with timing belt control, another ring is located behind the drive wheel. Due to the cramped conditions in the engine compartment, it is near impossible to get to these seals without removing the engine first. Although such an extensive task is very complex, the necessary tools, such as, for example, an engine crane, are quite inexpensive these days. On average, they cost 80 - 120 euro. Nowadays, the trade offers special tools for the removal and installation of crankshaft seals. With these tools, it is no longer necessary to disassemble the engine and remove the crankshaft in order to change the seal rings. Yet, if the engine is already removed, a major engine rebuild can be performed with a relatively small investment. In particular, the replacement of the timing belt, water pump and clutch is particularly easy with the engine removed. Although this will turn the replacement of the seal rings into a medium-scale engine rebuild, it will leave one with a mostly rebuilt engine that can provide many tens of thousands of kilometers of trouble-free operation. Affordable quality products Although replacing a crankshaft seal requires lots of effort, its price is surprisingly low. Even a brand name radial gasket rarely ever costs more than 10 euro. In most cases, these types of parts are available for as little as 2-5 euro. The challenge in replacing this important component is the removal and installation. Here, the use of a special tool is recommended. Although very expensive at around 280 euro, one might be able to borrow this tool from a trusted car repair shop.