Dismantling
1. Remove the cylinder head gaskets.
V8 engine, ENGINE OVERHAUL, Cylinder head gasket.
2. Remove connecting rod bearings.
V8 engine, ENGINE OVERHAUL, Connecting rod bearings.
3. Using a socket on the pulley bolt and a wrench, rotate the crankshaft to access the oil jets.
4. Turn away bolts of fastening of oil atomizers and remove atomizers.
Disassembly
1. To simplify subsequent assembly, mark the position in which the connecting rods are located.
2. To facilitate subsequent assembly, mark the position in which the pistons are located.
3. Install mandrels LRT-12-176 on the connecting rod so as not to damage the cylinder bore and connecting rod journals.
4. Remove carbon from the top of the cylinder.
5. Carefully knock the piston out of the cylinder.
6. Remove guides LRT-12-176 from connecting rods.
7. Clamp the connecting rod in a vice with soft jaws.
8. Carefully remove and discard the 2 piston pin circlips.
9. Push the piston pin out of the piston and connecting rod and remove the piston.
10. Repeat the operation on the seven remaining pistons.
Examination
1. Wipe the surface of the cylinders, pistons, piston rings, connecting rods and piston pins.
2. Pistons and cylinders: Measure the diameter of the cylinder in the lower, middle and upper chords in the plane shown in the figure. Write down the measurement results.
3. Repeat the measurement in the plane shown in the figure and for two groups of measurements, calculate the ovality and taper of the cylinder.
TECHNICAL DATA, Engine - V8.
4. Starting with #1 piston, measure the skirt diameter in a plane perpendicular to the piston pin axis, 12 mm from the bottom edge of the skirt.
5. Compare the piston diameter with the cylinder diameter and calculate the clearance between the piston and the cylinder.
TECHNICAL DATA, Engine - V8.
6. Using special pliers, remove the rings from the piston.
7. Insert new rings into the cylinder and check the mounting gap in them at a distance of 30 mm from the upper plane of the block. When measuring the clearance, make sure that the rings are in a plane perpendicular to the axis of the cylinder.
TECHNICAL DATA, Engine - V8.
8. Put on the oil scraper rings and the expander, making sure that the rings are in a butt joint and do not overlap.
9. Put on the second compression ring with the 'TOP' mark facing up.
10. Put on the top compression ring with the 'TOP' mark facing up.
11. Check up a backlash between a ring and a piston flute.
TECHNICAL DATA, Engine - V8.
12. Check the fit of the piston pin in the piston: the pin should move with little effort, without jamming or noticeable play.
13. Check the wear of the bushing of the upper head of the connecting rod, check the fit of the pin in the bushing: the pin should move with little effort, without jamming and noticeable play. The bushings of the upper heads of the connecting rods cannot be replaced. If necessary, the connecting rod assembly is changed.
14. Check the parallelism of the axes of the upper and lower heads of the connecting rods by measuring at a distance of approximately 150 mm from the plane of symmetry of the connecting rod.
TECHNICAL DATA, Engine - V8.
15. Check for deformation on both sides of the connecting rod.
Assembly
1. Wipe the cylinder bore, pistons, piston rings and connecting rods.
2. Install the pistons on their connecting rods, making sure that the arrow on the bottom of the piston, pointing to the front of the engine, is in the correct position with respect to the mark made during disassembly.
3. Lubricate the piston pins, piston bores and connecting rod tops with engine oil. Insert the piston pins and secure them with new retaining rings, which must be fully engaged in their grooves.
4. Lubricate the pistons, piston rings and cylinder bore with clean engine oil.
5. Check the freedom of movement of the rings in their grooves. Separate the ring locks by 120°relative to each other so that the locks are not on the most loaded side of the piston (the left side of the piston when looking at its front).
6. Compress the piston rings with a special tool.
7. Install mandrels LRT-12-176 on the connecting rod so as not to damage the cylinder bore and connecting rod journals.
8. Insert the connecting rod with the piston into the cylinder. Install the pistons with the arrow on the front of the engine, the connecting rods located on the same crankpin should be recessed towards each other, as shown in the figure.
9. Remove guides LRT-12-176 from connecting rods.
Assembly
1. Wipe oil nozzles and mating surfaces.
2. Install the oil nozzles and tighten the mounting bolts to 10 Nm.
3. Install connecting rod bearings.
V8 engine, ENGINE OVERHAUL, Connecting rod bearings.
4. Install the cylinder head gaskets..
V8 engine, ENGINE OVERHAUL, Cylinder head gasket.
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