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Home › Buick › 2021 › Envision Preferred, FWD › Repair and Diagnosis › Engine Mechanical › Engine Mechanical - 2.0L (LSY) › Specifications › Engine Mechanical Specifications

Engine Mechanical Specifications

Application Specification
Metric Units English Units
General Data
  • Engine Type
 4-Cylinder Inline
  • Displacement
 1998 ccm 122 CID
  • RPO
 2.0L (LSY)
  • VIN
 4
  • Valves
 16
  • Bore
 83 mm 3.27 in
  • Stroke
 92.3 mm 3.634 in
  • Compression Ratio
 10:1
  • Maximum Power @ Engine Speed
 172 kW / 5000 RPM
  • Maximum Torque @ Engine Speed
 350 N.m / 1500 - 4000 RPM 258 lb ft / 1500 - 4000 RPM
  • Idle Speed
 650 RPM
  • No-Load max. Speed
 6300 RPM
  • Compression
 The minimum compression in any 1 cylinder should not be less than 0.1 MPa (14.5 PSI)
  • Leakage of Pressure
 <25% per Cylinder
  • Spark Plug Gap
 0.70 - 0.80 mm 0.028 - 0.031 in
  • Firing Order
 1 - 3 - 4 - 2
  • Injection Pressure
 35 MPa 5076 PSI
Oil Circulation System
  • Engine Oil Filling with Oil Filter
 Approximate Fluid Capacities 
  • Engine Oil Identification between "min." and "max."
 Approximate Fluid Capacities 
  • Engine Oil Quality
 Dexos 1 Gen 2
  • Engine Oil Viscosity
 0W-20
  • Disposal of Engine Oil
 For disposal the engine oil follow safety regulations and national legislation.
  • Oil Consumption / 3219 km (2000 mi) - Maximum
 0.9 L 1.0 US qt
Lubrication System
  • Oil Pressure - @ 1500 RPM 100°C
 199.95 kPa 29 PSI
Engine Block
  • Engine Block Height
 285.55 mm 11.24 in
  • Crankshaft Main Bearing Bore Diameter
 53.793 - 53.807 mm 2.1178 - 2.1184 in
  • Cylinder Bore Diameter
 82.992 - 83.008 mm 3.2674 - 3.2680 in
  • Cylinder Bore Out-of-Round - Maximum
 0.013 mm 0.0005 in
  • Cylinder Head Deck Surface Flatness - over 25 mm length
 0.025 mm 0.001
Crankshaft
  • Main Journal Diameter Crankshaft
 48.992 - 49.008 mm 1.9288 - 1.9294 in
  • Connecting Rod Journal Diameter Crankshaft (Standard Size)
 45.992 - 46.008 mm 1.8107 - 1.8113 in
  • Crankshaft Thrust Bearing Seat Width
 23.674 - 23.726 mm 0.9320 - 0.9341 in
  • Crankshaft Main Bearing Shell Thickness (Selection 1) - ID W
 2.378-2.385 mm 0.0936 - 0.0939 in
  • Crankshaft Main Bearing Shell Thickness (Selection 1) - ID X
 2.386-2.393 mm 0.0939 - 0.0942 in
  • Crankshaft Main Bearing Shell Thickness (Selection 1) - ID Z
 2.394-2.401 mm 0.0942 - 0.0945 in
  • Crankshaft Main Bearing Shell Thickness (Selection 2 - 5) - ID W
 2.384-2.389 mm 0.0939 - 0.0941 in
  • Crankshaft Main Bearing Shell Thickness (Selection 2 - 5) - ID X
 2.390-2.395 mm 0.0941 - 0.0943
  • Crankshaft Main Bearing Shell Thickness (Selection 2 - 5) - ID Z
 2.396-2.401 mm 0.0943 - 0.0945 in
  • Crankshaft Thrust Bearing Thickness (Standard Size)
 2.475-2.525 mm 0.0974 - 0.0994 in
  • Crankshaft Main Bearing Clearance
 0.007-0.023 mm 0.0002 - 0.0009 in
  • Crankshaft Axial Clearance
 0.087 - 0.163 mm 0.0034 - 0.0064 in
Connecting Rod
  • Connecting Rod Length
 187.3 mm 7.374 in
  • Crankshaft Bearing Bore Diameter Connecting Rod
 48.992 - 49.008 mm 1.9288 - 1.9294 in
  • Pin Bore Diameter Connecting Rod
 21.007 - 21.015 mm 0.827 - 0.8274
  • Connecting Rod Bearing Shell Thickness (Standard Size)
 1.483 - 1.488 mm 0.0584 - 0.0586 in
  • Clearance Connecting Rod Bearing
 0.008 - 0.05 mm 0.0003 - 0.002 in
  • Clearance Piston Pin in Connecting Rod
 0.007 - 0.018 mm 0.0002 - 0.0007 in
Piston
  • Piston Pin Diameter
 20.097 - 21.000 mm 0.7912 - 0.8268 in
  • Piston Pin Bore Diameter
 21.005 - 21.010 mm 0.8270 - 0.8272 in
  • Piston Skirt Diameter
 82.1 - 82.3 mm 3.2323 - 3.2401 in
  • Piston Groove Width Upper Piston Compression Ring
 1.22 - 1.24 mm 0.0480 - 0.0488 in
  • Piston Groove Width Lower Piston Compression Ring
 1.01 - 1.03 mm 0.0398 - 0.0406 in
  • Piston Groove Width Piston Oil Ring
 1.52 - 1.54 mm 0.0598 - 0.0606 in
  • Compression Height
 29.03 - 29.13 mm 1.1429 - 1.1468 in
  • Clearance Piston Pin Piston
 0.005 - 0.013 mm 0.0002 - 0.0005 in
Piston Compression Rings and Oil Ring
  • Upper Piston Compression Ring Thickness
 1.17 - 1.19 mm 0.0461 - 0.0469 in
  • Lower Piston Compression Ring Thickness
 0.97 - 0.99 mm 0.0382 - 0.0390 in
  • Piston Oil Ring Thickness
 1.397 - 1.483 mm 0.0550 - 0.0584 in
  • Upper Piston Compression Ring Gap
 0.22 - 0.32 mm 0.009 - 0.0126 in
  • Lower Piston Compression Ring Gap
 0.42 - 0.57 mm 0.0165 - 0.0224 in
  • Piston Oil Ring Gap
 0.2 - 0.7 mm 0.0079 - 0.0276
Cylinder Head
  • Surface Flatness - Block Deck - Longitude
 0.05 mm 0.00197 in
If the deck surface is out of specification, replace the cylinder head. Do not machine the cylinder head.
  • Surface Flatness - Block Deck - Transverse
 0.03 mm 0.00118 in
If the deck surface is out of specification, replace the cylinder head. Do not machine the cylinder head.
  • Valve Seat Width - Intake
 1.000-1.400 mm 0.0394-0.0551 in
  • Valve Seat Width - Exhaust
 1.550-1.950 mm 0.0610-0.0768 in
  • Valve Seat Angle
 90 degrees (+/-1 degrees)
  • Valve Seat Angle Adjustment - Upper
 50 degrees (+/-4 degrees)
  • Valve Seat Angle Adjustment - Lower
 130 degrees (+/-4 degrees)
  • Valve Guide Bore
 6.00 - 6.02 mm 0.236 - 0.237 in
  • Valve Guide Assembly Height
 10.75 - 11.25 mm 0.4232 - 0.4429 in
  • Valve Guide Length
 38.25 - 38.75 mm 1.506 - 1.5256 in
Valve System
  • Intake Valve Disk Diameter
 33.97 - 34.13 mm 1.3374 - 1.3437 in
  • Exhaust Valve Disk Diameter
 27.87 - 28.13 mm 1.0972 - 1.1075 in
  • Intake Valve Stem Diameter
 6.4 - 6.8 mm 0.2520 - 0.2677 in
  • Exhaust Valve Stem Diameter
 6.69 - 7.19 mm 0.2634 - 0.2831 in
  • Intake Valve Length
 108.2 - 108.4 mm 4.260 - 4.2677 in
  • Exhaust Valve Length
 100.89-101.15 mm 3.9720 - 3.9823 in
  • Intake and Exhaust Valve Spring Length - Unstressed
 41.65 - 41.95 mm 1.6398 - 1.6516 in
  • Intake Valve Spring Length - 220 N +13 N /-13 N
 34.2 mm 1.3465 in
  • Exhaust Valve Spring Length - 220 N +13 N /-13 N
 32.3 mm 1.2717 in
  • Intake Valve Spring Length - 557 N (REFERENCE)
 23.7 mm 0.9331 in
  • Exhaust Valve Spring Length - 557 N (REFERENCE)
 22.8 mm 0.8976 in
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