2. After the head is returned from the workshop, the valves and associated components will already be installed. In this case, you should skip the procedures of the next two paragraphs and immediately proceed to the actions described below (see paragraph 5).
3. On diesel engines lubricate the valve stems with thin oil and insert them into their guide bushings.
4. Install the valve spring seats.
5. On gasoline engines install the spring seats, then, after dipping it in clean engine oil, place the oil-deflecting cap on the guide sleeve of the first valve - act very carefully, trying not to damage the sealing edges of the cap. Pressing the cap onto the sleeve is done using a cylindrical mandrel, which can be a replaceable socket head of the appropriate size, or a section of pipe of a suitable diameter.
6. On diesel engines repeat the procedures of the previous paragraph (the oil deflector cap is first placed on the valve stem, then on the guide sleeve).
7. Using a special tool, compress the spring by lowering the plate, then install the split lock crackers into the open upper groove on the valve stem. In order to temporarily fix the crackers until the tool is released, lubricate them from the inside with consistent grease. Slowly release the spring and make sure that the crackers are securely seated.
Typically, springs are installed in coils with a reduced pitch towards the head.
8. On dOHC engines install the valve lifters and camshafts in place.
9. On sOHC engines install the camshaft, hydraulic tappet assemblies and valve actuator levers.
10. Make sure that the old components removed from the head and intended for further use are installed strictly in their original places.
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