Removing the camshaft

Remove the cylinder head cover

Disconnect the engine management system wiring harness block from the phase sensor and coolant temperature sensor.

Removing and installing the camshaft VAZ-11183

Using a 10mm wrench, unscrew two nuts 1 and one bolt 2 securing the cylinder head plug.

Removing and installing the camshaft VAZ-11183

There is a rubber O-ring under the bolt head.

Removing and installing the camshaft VAZ-11183

Remove the cylinder head plug along with the sensor.

Removing and installing the camshaft VAZ-11183

A rubber O-ring is installed in the groove of the plug flange.

Removing and installing the camshaft VAZ-11183

Remove the camshaft timing pulley

Removing and installing the camshaft VAZ-11183

Using a “13” wrench, evenly, in several steps (until the pressure of the valve springs is relieved), unscrew the ten nuts securing the camshaft bearing housings.

Removing and installing the camshaft VAZ-11183

Remove both camshaft bearing housings from the studs

Removing and installing the camshaft VAZ-11183

Having slightly moved the rear timing belt cover away from the cylinder head, remove the camshaft.

Remove the oil seal from the camshaft toe.

Install the camshaft in the following sequence:

We clean the mating surfaces of the cylinder head and bearing housings from old sealant and oil.

Lubricate the camshaft bearing journals and cams with engine oil

Position of the cams of the first cylinder when placing the camshaft in the cylinder head supports

Place the shaft on the cylinder head supports so that the cams of the first cylinder are directed upward.

In this case, the pistons of the 1st and 4th cylinders must be at TDC

Removing and installing the camshaft VAZ-11183

Removing and installing the camshaft VAZ-11183

On the surfaces of the cylinder head, mating with the bearing housings in the area of the outer supports, apply a thin layer of silicone sealant.

Applying sealant to the surface of the cylinder head

Install the bearing housings and tighten the nuts securing them in two steps

Pre-tighten the nuts in the sequence shown in the figure until they fit surfaces of the bearing housings to the cylinder head.

In this case, it is necessary to ensure that the installation sleeves of the housings fit freely into their sockets

Procedure for tightening the camshaft bearing housing nuts

Procedure for tightening the camshaft bearing housing nuts

Finally tighten the nuts in the same sequence

After tightening the nuts, carefully remove any remaining sealant squeezed out of the gaps.

Press in the new camshaft oil seal.

Before installing the plug, put an O-ring on it.

Check the clearances in the valve mechanism. (The clearances must be checked, especially if the distribution parts have been changed. To do this, see the article - “Adjusting valve clearances”)

We carry out further assembly in reverse order

new

UAZ vehicles are equipped with three types of mechanical three-shaft gearboxes:

Maintenance of the K-126GU carburetor (for engines mod. 4178) The K-126GU carburetor is used to complete the 4178 model engines, as an option to replace the K-151V carburetor