Crankshaft bearings are fixed in 5 places with dowel pins, they are often lost or damaged by engine failure. If this is the case, check that the hole is not damaged by this, in which case you will have to drill the hole and insert an oversized pin and also enlarge the hole in the bearing.
If the pin is not present, the bearing may start to rotate, blocking the oil supply and damage will be big.
The pins mentioned here have the standard size of 4.98 mm and a length of 8 mm.
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