Start the engine and let it run until the electric cooling fan turns on for the first time.
Maintain the engine speed at 2500 rpm for 2 minutes.
If you hear noise 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 camshaft cam heads corresponding to the valves of the cylinder being checked are facing the hydraulic tappet;
- press the plunger with a wooden or plastic wedge and measure the free travel of the plunger, which should be no more than 0.10 mm before the valve opens. If it is more, the plunger must be replaced.
Warning: After installing the pusher, pre-filled with oil and bled, the engine may not be started earlier than 30 minutes later to prevent the valves from hitting the pistons.
The article is a reprint of material from: AudiManual.ru