Removing the cylinder head of the VAZ-2123 engine

We conditionally remove the cylinder head from the engine dismantled from the car. Therefore, operations to prepare for the removal of the cylinder head are not considered in this article.

Remove the valve cover for this:

Using a 10 head or socket wrench, unscrew eight nuts securing the cylinder head cover.

Remove the engine screen mounting brackets, six pressure washers and wire harness holders from the studs.

Remove the valve cover

Remove the cover gasket.

Turn the crankshaft until the mark on the camshaft sprocket aligns with the mark on the camshaft bearing housing

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Remove the hydraulic chain tensioner for this:

With a head of 13, we unscrew the fitting of the oil supply pipe to the tensioner.

Remove the copper washer from the fitting and take out the bolt-fitting with the gasket

With a head of 10, we unscrew the two nuts securing the tensioner to the cylinder head

Remove tensioner and gasket

Remove the camshaft for this:

We bend the lock washer on the camshaft sprocket with a screwdriver or chisel

Using a 17 spanner, unscrew the bolt securing the camshaft sprocket

Removing the bolt with lock washer

We tie the chain to the sprocket and remove it together with the chain from the camshaft.

With a head of 13, we evenly unscrew the nine nuts securing the camshaft bearing housing and the oil supply pipe to the hydraulic bearings

Remove from the studs of the cylinder head the oil supply pipe to the hydraulic bearings of the valve levers

Remove the camshaft assembly with the bearing housing

Remove the levers of the valve drive, mark the parts or fold them in order

Unscrew the block head for this:

Using a 13 head, we unscrew the cylinder head bolt located next to the generator bracket

Using the E16 head, unscrew the ten bolts securing the head to the cylinder block and remove the bolts.

Remove the cylinder head assembly with thermostat, throttle assembly, receiver, intake manifold and exhaust manifold

Removing the head gasket

We wash the cylinder head, inspect and defect the head.

Install the block head in reverse order.

Tighten the block head in four steps:

• 1st trick - tighten bolts 1–10 with a torque of 20 Nm (2.0 kgf.m);
• 2nd technique - tighten bolts 1–10 with a torque of 69.4–85.7 Nm (7.1–8.7 kgf.m), and bolt 11 with a torque of 31.4–39.1 Nm (3 .2–4.60 kgf.m).
• Then turn bolts 1–10 by 90° (3rd step)
• and another 90° (4th step).