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VR6 engine
The nominal diameter of the cylinder 81.01 mm The dimensions of the piston: 1st repair size 81.51 mm 2nd oversize 82.01 mm Valve Guides The inner diameter of 7,013-7,035 mm plugs The gap valve stem:
| Fig. 38. Control of beating the valve stem inside the guide sleeve using a measuring device VW387
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Valve seats The diameter of the valve seat: inlet valves 38,30 mm exhaust valves 33,50 mm The angle of the valve seat 45 ?� The width of the valve seat: the intake valve is more than 1, 7mm exhaust valves is not more than 2.0 mm Outside correction angle: intake valves 30 ?� exhaust valves 75 ?� Max. permissible value
| Fig. 42. Measure the height of the protrusion end of the valve stem above the upper edge of the cylinder head
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inlet valves 33,90 mm exhaust valves 34,10 mm Valves The diameter of the valve disc: inlet valves 39,00 mm exhaust valves 34,20 mm The length of the valve: 106.25 mm intake valves 106.95 mm exhaust valves The diameter of the valve stem: intake valves 6.97 mm exhaust valves 6.95 mm The thickness of the edge of the valve is not less than 0.5 mm Pistons Meas piston diameter of 6.0 mm from the bottom of the piston skirt at an angle of 90 ?� to the piston pin axis Bore: nominal 80.985 mm 1st repair 81.485 mm 2nd repair 81.985 mm Max. wear limit of 0.04 mm piston The clearance of the pistons: normal 0.03 mm the legal limit of 0.07 mm The gap between the piston rings and grooves: normal (compression ring) 0.02-0.07 mm normal (scraper ring) 0.02-0.08 mm the legal limit of 0.15 mm Heat the gap: Normal - Compression Piston Ring 0.20-0.40 mm normal - scraper Ring 0.25-0.50 mm the legal limit of 1.0 mm Cranks Axial internal clearance 0,05-0,31 mm Limits 0.37 mm The clearance of the piston pin 0.01-0.02 mm The length of the rods between the centers bearing 164.0 mm Crankshaft The number of main bearings 7 Designation main bearing 1 to 7, starting from the front of the engine (by the shock absorber) Adjusting the axial clearance shims Main and connecting rod bearings The axial clearance of the crankshaft: normal 0,07-0,17 mm the legal limit of 0.25 mm Main bearing clearance: normal 0.02-0.06 mm the legal limit of 0.1 mm Connecting rod bearing clearance: normal 0.01-0.06 mm the legal limit of 0.1 mm The diameter of the neck of the radical bearing: nominal diameter of 60.00 mm 1st repair 59,75 mm 2nd repair 59,50 mm 3rd repair 59,25 mm Engine lubrication system The pressure in the lubrication system 1 bar [100 psi] Maximum pressure in the lubrication system 7 bar [700 psi] The amount of oil in the engine, which must be filled with the oil change: with the change of filter 5,5 l without filter change 5.0 l Engine cooling system The amount of cooling liquid in the cooling system: with a manual transmission 9 l with automatic transmission, 9.1 liter Thermostat Opening temperature 85 ?� C Closing temperature to 105 ?� C
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