Toyota 13041-74030-02 Bearing, Connecting Rod

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When overhauling an engine, despite the new main and connecting rod bearings must be fitted, holding the worn bearings for analysis could prove useful. Lubrication, dirt or some foreign particles on the bearing, overloading of the engine, and corrosion are some of the causes of bearing failure and before reassembling should be checked to ensure that they are not present. When inspecting bearings, it is recommended that once you pull out the bearings, arrange them neatly so that if there is any matching to be done with the crankshaft journal, it is made easier. Matter can also be introduced to the engine during the assembly process or by the filters and through machining operations may get lodged in the bearing material holes, whereas larger sizes may result in score marks. To decrease this risk, it is recommended that owners clean all parts of the bike and change the oil or the filter frequently. Lack of lubrication may result from high temperatures, overloading, leakage, or blocked supply channels and may result to things as severe as the bearing material being swept off its backing. Some typical driving cycles like surge driving at very low speeds or very short stop and go driving also damage the bearing heavily, arsing high loads or inability to get the heat to evaporate moisture and corrosive gases. Oil starvation or high spots that cause failure are some of the pull outcomes that follow improper installation. When the original bearings are worn out or when the oil clearances are incorrect then some standard procedures have to be adhered when choosing new bearings especially when the crankshaft has been reground it is then necessary to opt for the bearings that are undersized. In the case of standard size main bearings, use the same number as indicated in the original equipment but in case the markings are obscured, they can use the stamped numbers on the block or crankshaft. The oil clearance defines the correct bearing sizes in this case and if there is some doubt, their dealer may have to be consulted.