Cleaning
1. Rotate the plugs in the holes by hitting the side of each plug with a blunt rod.
2. Remove the plastic plugs with pliers.
3. The 6-cylinder engine has metal plates instead of plastic plugs.
4. Using a plastic scraper, scrape off all traces of sealant from the mating surface of the cylinder block.
5. Unscrew or drill out plugs of oil channels from the block of cylinders. Use new plugs during assembly.
6. If the block is too dirty, it must be cleaned in a specialized workshop.
7. Clean and flush oil holes and channels with warm water. Dry holes and channels by blowing them with compressed air. Lubricate the block with anti-corrosion oil.
8. Clean the threads of the holes in the block with taps of the required size. Clean the cylinder head bolts and main bearing bolts.
9. Install the main bearing caps and screw in the bolts.
10. Using a special tool, drive new, lubricated with sealant, plugs into the holes in the block.
11. Apply sealant to the oil passage plugs and screw them into the block.
Examination
1. Inspect the unit for cracks and signs of corrosion or rust. Inspect the threads of the block holes. If defects are found, the unit must be repaired or replaced if possible.
2. Inspect the cylinders and check them for taper and ovality.
3. Measure the diameter of each cylinder perpendicular to the center line (A) and parallel to the center line (IN) (1 - the center line of the engine).
4. Measure the cylinder diameter with a telescopic gauge.
5. Measure the length of the telescopic gauge with a micrometer.
6. Measure the diameter of each cylinder in the upper middle and lower parts of it, perpendicular to the axis of the crankshaft.
7. The taper of a cylinder is calculated as the difference between the top and bottom diameters. Ovality is the difference between parallel and perpendicular measurements.
8. If the results obtained do not match the technical requirements, the cylinders must be processed in a specialized workshop.
9. Using a ruler and feeler gauges, check that the surface of the block mating with the head is not deformed.
10. Check piston and cylinder wear with feeler gauges. If you find wear or damage when inspecting the unit, contact a specialist.