engines
The engine of a car is the engine that drives a car.
This section describes the design, maintenance, and repair of engines.
Some engines and their features are described directly in the sections that describe this vehicle.
The removal of the camshaft was covered in the article “Cylinder head removal”.
With excessive camshaft wear, the oil pressure in the engine may drop and valve knock may appear even with serviceable hydraulic tappets.
We conventionally remove the oil pump drive gear and shaft on the engine removed from the vehicle.
To remove the oil pump drive gear, we unscrew the alternator mounting bracket (article – engine dismantling).
The timing drive of the VAZ-2123 engine consists of sprockets, a chain, a guide shoe, a damper and a hydraulic chain tensioner.
The engine chain is single-strand, unlike the engines of previous models.
The timing chain tensioner is located on the right-hand side of the engine above the cooling system pump.
Oil is supplied to the hydraulic tensioner through a 6 mm diameter seamless steel pipe with end fittings.
The main dimensions of the connecting rod and piston assembly are shown in Figure 1.
The piston is cast aluminium. The mass of the pistons is strictly maintained during manufacture.
