Checking the lubrication clearance of connecting rod bearings
Location of piston ring end gaps (4-cylinder engine)
1. Upper compression ring; 2. Deepening (directed towards the front of the engine); 3. Lower oil scraper ring; 4. Lower compression ring; 5. Expansion ring; 6. Upper oil scraper ring
Location of piston ring end gaps (6-cylinder engine)
1. Right row piston; 2. Lower oil scraper ring; 3. Mark facing the front of the engine; 4. Mark facing the front of the engine; 5. Upper oil scraper ring; 6. Upper compression ring; 7. Expansion ring; 8. Lower compression ring
The arrangement of the end gaps of the piston rings of the left row is identical.
1. Clean the upper connecting rod bearing shell and install it on the connecting rod. The oil holes in the connecting rod and the shell must be aligned.
2. Clean the second bearing and install it into the connecting rod cap.
3. Arrange the piston ring end gaps as shown in Fig. Arrangement of piston ring end gaps (4-cylinder engine) and in Fig. Location of piston ring end gaps (6-cylinder engine).
4. Lubricate the pistons and rings and compress the piston rings using a piston ring compressor.
5. Turn the crankshaft so that the connecting rod bearing of the first cylinder is at the bottom dead center position and lubricate the cylinder walls.
6. Make sure the mark on the top of the piston is facing forward.
7. Press the piston down and install it into the cylinder.
8. Place a piece of plastic on each of the connecting rod bearings parallel to the crankshaft axis.
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9. Install the connecting rod bearing caps (the marks on the covers must be directed towards the timing belt). Tighten the cover bolts according to the instructions given in the technical specifications (see subsection 3.3.1.1., subsection 3.3.1.2.).
10. Compare the width of the crushed film with a special scale.
11. If the gap size is not as required, the bearing shells may be the wrong size.
Final installation of pistons and connecting rods
1. Remove all traces of plastic. Check that the surface of the bearings is absolutely clean and lubricate them with engine oil.
2. Install the connecting rod on the shaft journal, install the connecting rod cap and tighten the nuts to the required tightening torque. The installation of the remaining connecting rods is carried out in a similar manner.
3. After installing all connecting rods, turn the crankshaft several times and check for ease of movement.
4. Check the axial play of the connecting rods.