Engine Overview and Common Failures
The weight of the VAZ 2105 engine according to the catalog is 112 kg. The engine number of the VAZ 2105 is located above the oil filter. According to the regulations, the timing belt in this power unit should be changed every 60,000 km, but it often breaks earlier. It's good that in this case the valves almost never bend. The wear of the camshaft is a well-known problem for all classic engines. Usually, this happens to those who save on oil or forget to adjust the valves. Like all VAZ engines of that time, this unit is prone to regular overheating due to a faulty thermostat, water pump, or fan. Their lifespan is not very high. Closer to 80-100 thousand km, many owners face oil consumption. The main causes are worn rings, oil control rings, or clogged PCV valve. Other problems include carburetor issues, short-lived auxiliary equipment, and regular lubricant leaks through the rear crankshaft seal or from under the valve cover.