Engine Overview and Common Failures
The weight of the VAZ 21127 engine according to the catalog is 115 kg. Engine misfires, besides faulty spark plugs, are often caused by clogged fuel injectors. Cleaning them usually solves the problem. Electrical problems are also common, with malfunctions in the ignition coils, starter, ECU 1411020, fuel pressure regulators, and idle control valves. The timing belt, manufactured by Gates, has a claimed lifespan of 180,000 km, but it doesn't always last that long. Often, the tensioner pulley fails, causing the belt to break and bend the valves. The manufacturer started installing non-interference pistons only from July 2018. The quality of domestic thermostats has not improved significantly over time, and overheating due to their failure occurs regularly. This power unit also does not tolerate extreme cold temperatures, and many Lada owners have to cover the radiator with cardboard during winter. If you hear knocking sounds under the hood, we recommend checking the hydraulic lifters first. If it's not them, then you may have signs of wear in the connecting rod-piston group.