Checking the technical condition of hydraulic pushers

The design of the hydraulic pusher is non-separable and cannot be repaired.

Start the engine and let it run until the cooling fan is turned on for the first time.

Maintain the engine speed of 2500 rpm for 2 minutes.

If noise is heard in the valve train, determine the faulty tappet as follows:

• remove the cylinder head cover;
• turn the engine crankshaft clockwise by the pulley mounting bolt so that the backs of the camshaft cams corresponding to the valves of the cylinder under test face the hydraulic tappet;
• drown the pusher with a wooden or plastic wedge and measure the free play of the pusher, which should not exceed 0.10 mm before the valve opens. If it is larger, the pusher must be replaced.

Warning. After installing a new pusher, pre-filled with oil and pumped, it is allowed to start the engine no earlier than 30 minutes in order to prevent the valves from hitting the pistons.