Table of contents: Cylinder head 🠇 Valve seats 🠇 Camshaft 🠇 Pistons and connecting rods 🠇 Connecting rods and connecting rod…🠇 Crankshaft and flywheel 🠇
Cylinder head
- Material - Light metal alloy
- Cylinder head height: 141.0020±0.005 mm (16-valve: 132.00 mm)
- Cylinder head height marked "R" - minimum permissible cylinder head height - 140.75 mm (8-valve only)
- The maximum permissible cylinder head tilt is 0.05 mm
- The permissible thickness of material removal during processing is 0.2 mm (16-valve - not permitted)
- Cylinder head gasket thickness - normal - 1.20 mm
- Cylinder head gasket thickness - ground head - 1.40 mm (8-valve only)
- Cylinder head gasket thickness - marked "R" - 1.40 mm (8-valve only)
- Gasket marking - See XU7/10 engine section
Valve guides:
- Nominal outside diameter: 13.00 mm
- 1st repair size, 1 groove - 13.275 mm
- 2nd repair size, 2 grooves - 13.525 mm
- Guide bushing hole: 8.0 mm
Mounting height, head surface to guide bushing
- intake valve guide bushings — 40±0.35 mm
- exhaust valve guides - 33 mm
Cylinder head bore diameter:
- Nominal diameter: 13,000 mm
- 1st repair size - 13.245 mm
- 2nd repair size - 13.495 mm
Valve seats
Valve seat angle:
- Inlet valves - 45° (full angle 90°)
- Exhaust valves - 45° (full angle 90°)
Valve seat width:
- Intake valves - 1.70 mm
- Exhaust valves - 2.20 mm
Replacing valve seat rings - Performed in a specialized workshop
Valves:
Valve seat angle - see above
Valve head diameter:
- Intake valves - 42.60 mm
- Exhaust valves - 34.50 mm
Overall length:
- Intake valves - 108.80 mm
- Exhaust valves - 108.37 mm
Valve stem diameter:
- Intake valves - 7.984 - 0.01 mm
- Exhaust valves - 7.970 - 0.01 mm
The maximum permissible grinding of the valve stem end is 0.20 mm
The minimum permissible thickness of the valve edge is 0.50 mm
Valve guide clearances:
- Inlet valves - 0.02 - 0.042 mm
- Exhaust valves - 0.04 - 0.060 mm
- Maximum working clearance: 0.10 mm
Valve springs:
- The spring wire diameter is 4.5 mm
- Spring diameter: 33.70 mm
- Length in free state - 54.50 mm
Spring markings - Intake and exhaust valve springs are identical
Camshaft
- Number of bearings - 5
- Axial clearance of the camshaft is 0.07 - 0.13 mm
- Maximum clearance - 0.16 mm
Shaft journal diameter:
- Bearing No. 1 - 27.00 mm
- Bearing No. 2 - 27.50 mm
- Bearing No. 3 - 28.00 mm
- Bearing No. 4 - 28.50 mm
- Bearing No. 5 - 36.00 mm
The tolerance of the bore diameter of bearings No. 1 to No. 4 is + 0.033 mm
Bearing bore diameter tolerance No. 5 — + 0.039 mm
Pistons and connecting rods
Installation of piston pins - Floating fit in the piston and press fit in the connecting rod bore.
Direction of piston installation - The arrow on the bottom of the housing must point towards the timing drive.
Piston rings:
- Number of rings - 3
- Ring design: 1 regular compression ring, 1 trapezoidal ring, 1 oil-deflecting ring
Piston ring thickness:
- top ring - 1.5 mm
- middle ring - 1.75 mm
- oil deflector ring - 3.00 mm
Piston ring joint clearances; the rings are supplied adjusted, the adjustment is not changed, nominal dimensions:
- upper compression rings 0.20 - 0.40 mm
- medium compression ring 0.15 - 0.35 mm
| Piston diameter | 1.8 liter engine | 2.0 liter engine |
| nominal diameter (0) | 82.967 mm | 85.967 mm |
| repair size (1) repair size (2) | 82.217 mm | 86.217 mm |
| 0.1 or 2 are stamped on the piston | 82.567 mm | 86.567 mm |
| Cylinder bore diameter | 1.8 liter engine | 2.0 liter engine |
| nominal diameter (0) | 83.00 mm | 86.00 mm |
| repair size (1) | 83.25 mm | 86.25 mm |
| repair size (2) | 83.60 mm | 86.60 mm |
Connecting rods and connecting rod bearings
Design - Conventional bearing shells B
Material - Aluminum-zinc alloy
Connecting rod bearing journal diameter. See "Crankshaft"
- Pin hole diameter: 22,000 mm
- Bearing bore diameter: 53.965 mm
- The length of the connecting rod between the centers of the holes is 126.8 mm (1.4-liter engine)
Crankshaft and flywheel
Number of bearings - 5
Main bearing shells:
- Design - Conventional bearing shells, with or without lubrication grooves, mark before removal
- Material - Aluminum-zinc alloy
Crankshaft axial play: 0.07–0.32 mm
Thickness of expansion washers:
- nominal size - 1.85 mm
- larger sizes - 1.95, 2.00 and 2.05
Main journal diameter - all engines:
- nominal size 60,000 mm - 0.019 mm
- repair size 59.700 mm - 0.019 mm
Bearing holes in the engine crankcase (the lids are installed): nominal diameter - 63.750 mm
The maximum permissible ovality of bearing journals is 0.007 mm
Main bearing shells:
- nominal thickness - 1.842 mm
- repair size - with white markings along the edge 1.992 mm
Crankpin diameter:
- nominal size 50.0 mm - 0.016 mm
- repair size 49.7 mm - 0.016 mm
- connecting rod bearing shells - nominal thickness - 1.837 mm
- connecting rod bearing shells - repair thickness - 1.987 mm
Connecting rods:
- Connecting rod bushing bore diameter: 22.000 mm
- Connecting rod bearing bore diameter: 48.655 mm
- Length between centers: 152.0 mm (2.0-liter engine)
- The maximum permissible difference in weight on one engine is 3 g
- Maximum flywheel runout: 0.06 mm