Genuine Volkswagen Cabrio Rod Bearing

Volkswagen Cabrio Rod Bearing Parts and Q&A

• Bearing
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  Q: Why is it essential to retain old main and connecting rod bearings during engine overhaul on Volkswagen Cabrio?

  A:

  When performing engine overhaul, old main and connecting rod bearings must be kept aside to carefully inspect and examine because they can be a great help in determining the engine condition. The failure can be caused by poor lubrication, dirt or foreign objects, overloading of the engine and corrosion and it is essential to ensure that the cause of the failure is remedied to ensure that this does not recur once the engine is reassembled. In the inspection of bearing shells, take them out of their respective positions, and spread them on a clean bench, in order to match any defects with the journal or crankshafts in the engine, without handling the inner surface of the shells to prevent scratches. During assembly foreign matter may get into the engine, or it may be introduced by filters and ventilation systems, and will frequently be trapped in the soft bearing material, and larger pieces of foreign matter may cause scoring or gouging. Detection is in the thorough cleaning of all parts and changing the oil and filter regularly. Shortage of lubrication may be caused by too much heat, overloading, or leaks of oil, and other causes which result in severe effects such as wearing off the lubricating material of the backing. The operating driving habits, full throttle, low speed operation, may also adversely influence bearing life by developing high loads that result in fatigue failure. Short distance driving also leads to corrosion because of lack of heat to evaporate moisture and gases that leads to the formation of acid which corrodes bearing material. Improper assembly during installation may result in lack of oil because of the narrow clearances or build-up. When reassembling, one should be careful to ensure that no internal bearing surface is touched to avoid scratches or contamination. One of the tips that should be observed when doing engine overhaul is the replacement of bearing shells in order to prevent false economy. Main and big-end bearings can be found in standard sizes and in a variety of undersizes to fit reground crankshafts, and running clearances will have to be verified with the new bearings fitted.