If the oil leak from under the cylinder head cover could not be eliminated by tightening the cover bolts, replace its gasket

You will need: a 12 wrench, a screwdriver.

Disconnect the wire from the negative terminal of the battery.

Drain the cooling system.

Replacing the ZMZ-409 cylinder head cover gasket

Loosen the inlet hose clamp and move it aside.

Replacing the ZMZ-409 cylinder head cover gasket

Disconnect the hose and wire harness holders.

Replacing the ZMZ-409 cylinder head cover gasket

Remove the crankshaft position sensor harness from the holder.

Replacing the ZMZ-409 cylinder head cover gasket

Remove the high voltage wire ends from the spark plugs.

Note. If the replacement of high-voltage wires is not expected, the tips can not be removed from the wells of the cover.

Replacing the ZMZ-409 cylinder head cover gasket

Loosen the ventilation hose clamp and remove the hose.

Replacing the ZMZ-409 cylinder head cover gasket

Loosen the suction hose clamp and remove the hose.

Replacing the ZMZ-409 cylinder head cover gasket

Disconnect the wire blocks from the primary connectors of the ignition coil.

Replacing the ZMZ-409 cylinder head cover gasket

Remove the head cover bolts

Replacing the ZMZ-409 cylinder head cover gasket

Remove the cover along with the gasket, high voltage wires and ignition coils.

Replacing the ZMZ-409 cylinder head cover gasket

Peel the gasket off the cover.

Replacing the ZMZ-409 cylinder head cover gasket

Inspect the condition of the valve cover seal and oil scraper tubes, replace if necessary.

Replacing the ZMZ-409 cylinder head cover gasket

Degrease the surface of the lid.

Wipe the surface of the cylinder head.

Replacing the ZMZ-409 cylinder head cover gasket

Install a new gasket on the cover, install the cover in the reverse order of removal, and connect all hoses and wires.