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What’s worth to know about engine rebuilding?:

What’s worth to know about engine rebuilding? As a rule, we realise that our car engine has started malfunctioning when we see certain signals on the dashboard, hear some uneven sound during operation of the engine, notice an unusual colour of exhaust gases, find metal chips in the engine oil or notice smoke coming from the engine. These indications may be accompanied by additional ones, such as jerky or stalling operation of the engine or problems with its starting. All these indications may be a consequence of reduced compression or warn parts.

In such case, it is worth applying to a motor service where the engine’s diagnostics will be performed and the decision will be taken to replace or to rebuild the engine. Before hurrying to a motor service, you should know that there may me more than one problem which can be erroneously identified with the indication of the engine’s breakdown. For example, if the air conditioner is out of order – it is more likely that the reason for that is related with the air conditioner’s compressor, but not with the engine.

How is the engine rebuilt?

Usually, the engine’s rebuilding is related to the replacement of such parts as valves, pistons, piston rings, seals, sealants, washer or renovation of cylinders and their units, cylinder unit head, crankshaft and pump shaft.

A cylinder unit head is replaced when it gets deformed due to the overheating of the engine. Replacement of piston rings and restoration of the tightness of valves allows normalising the engine’s compression and protecting against excessive oil consumption level. During such repair, separate parts are removed; therefore, it does not mean a complete rebuilding of the engine.

When the engine is completely rebuilt it is removed and tested and, if necessary, several of these components are replaced: the main liners of the crankshaft, engine’s compressor, shaft’s pin, pistons, crank-gear liners, oil pump, balancing shaft, etc. A balancing shaft is replaced in order to eliminate vibrations caused by cylinders; a new oil pump will guarantee the effective supply of oil to the oil tank and oil cooling and cleaning devices. The more parts are replaced by new ones, the smoother the car engine’s operation will be. Of course, when a particular breakdown is diagnosed, it may be necessary to replace only one part, but the older is the car, the higher is the risk that other parts of the car are also warn.

If after consulting the car specialist it appears that it’s not worth repairing the engine, a possibility to acquire a used or rebuilt engine may be considered. You should remember that when replacing the engine you must always pay attention to its alphabetical code which indicates the year of manufacturing and the model of the car. Most of the popular engines for rebuilding are the VW T5 2.5TDI 96 / 128kW with the codes AXD / AXE and BNZ / BPC.

Operation of a rebuilt engine

When we recover from a disease we don’t start immediately running long distances, the same can be said about the engine – after major rebuilding the engine needs a certain transitional period. After rebuilding, the engine should be operated under as diverse as possible working conditions, i.e. different revolutions, loads and speeds. Naturally, the engine should not be ‘fatigued’ for a long time by maximum revolutions or tested under adverse atmospheric conditions. When you cover the first thousand of kilometres, change the oil, check the level of fuel (due to diversified operating conditions your fuel consumption will increase) and, eventually, you will be able to enjoy the possibilities of the rebuilt engine.