Removing the head from the engine was discussed in the article - "Dismantling the cylinder head »

Disassembling the cylinder head in the article - "Disassembling the cylinder head"

In this article, we will consider checking and repairing the cylinder head.

Removing the camshaft was discussed in the article - "Dismantling the cylinder head» .

With increased wear of the camshaft in the engine, oil pressure may drop and valve knock may appear even with serviceable hydraulic lifters.

We conditionally remove the gear and the oil pump drive roller from the engine dismantled from the car.

To remove the oil pump drive gear, unscrew the generator mounting bracket (article - engine disassembly).

The drive of the gas distribution mechanism of the VAZ-2123 engine consists of sprockets, a chain, a shoe, a damper and a hydraulic chain tensioner.

The engine chain is single-link, unlike the engines of previous models.

The timing chain tensioner is located on the right side of the engine above the coolant pump.

Oil is supplied to the hydraulic tensioner through a seamless steel tube with a diameter of 6 mm with tips.

The main dimensions of the connecting rod and piston group are shown in Figure 1.

The piston is cast aluminum. The mass of the pistons is strictly maintained in the manufacture.