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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 2.0L (LTG) - Specifications >> Specifications >> Engine Mechanical Specifications

Engine Mechanical Specifications

Application Specification
Metric English
General Data
  • Engine Type
 Inline 4 Cylinder
  • Displacement
 2.0L 122 CID
  • RPO
 LTG
  • VIN
 -
  • Bore
 85.992-86.008 mm 3.3855-3.3861 in
  • Stroke
 86 mm 3.386 in
  • Compression Ratio
 9.50
  • Spark Plug Gap
 0.95-1.10 mm 0.037-0.043 in
Block
  • Crankshaft Main Bearing Bore Diameter
 60.862-60.876 mm 2.3961-2.3967 in
  • Cylinder Bore Diameter
 85.992-86.008 mm 3.3855-3.3861 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 in
  • Cylinder Head Deck Surface Flatness - over 150 mm length
 0.050 mm 0.002 in
Engine Block to Bedplate Flatness - overall 0.1 mm 0.0039 in
Engine Block to Bedplate Flatness - straightness 0.050 mm in 100 mm 0.002 in within 3.937 in
Piston Deck Height - Below Deck 1.155-1.725 mm 0.0455-0.0679 in
Camshaft
  • Camshaft End Play
 0.040-0.307 mm 0.0016-0.0121 in
  • Camshaft Journal Diameter - Journal1
 34.935-34.960 mm 1.3754-1.3764 in
  • Camshaft Journal Diameter - Journal 2 thru 5
 26.935-26.960 mm 1.0604-1.0614 in
  • Camshaft Thrust Width - Camshaft with Phaser installed
 30.025-30.175 mm 1.1821-1.1880 in
  • Camshaft Thrust Width - Cylinder Head
 29.868-29.890 mm 1.1759-1.1768 in
Connecting Rod
  • Connecting Rod Bearing to Crankpin Clearance
 0.030-0.073 mm 0.0012-0.0029 in
  • Connecting Rod Bore Diameter - Bearing End
 52.118-52.134 mm 2.0519-2.05252 in
  • Connecting Rod Bore Diameter - Pin End
 24.007-24.017 mm 0.9452-0.9455 in
  • Connecting Rod Side Clearance
 0.070-0.370 mm 0.0028-0.0146 in
  • Connecting Rod Straightness - Bend - Maximum
 0.017 mm 0.0007 in
  • Connecting Rod Straightness - Twist - Maximum
 0.040 mm 0.0016 in
Crankshaft
  • Connecting Rod Pin Diameter
 48.999-49.015 mm 1.9291-1.9297 in
  • Crankshaft End Play
 0.040-0.270 mm 0.0016-0.0106 in
  • Crankshaft Main Bearing Clearance
 0.020-0.048 mm 0.0008-0.0019 in
  • Crankshaft Main Journal Diameter
 55.993-56.009 mm 2.2044-2.2051 in
Cylinder Head
  • Surface Flatness - Block Deck - within 25 mm
 0.025 mm 0.0001 in
  • Surface Flatness - Block Deck - within 150 mm
 0.050 mm 0.0019 in
  • Surface Flatness - Block Deck - between bolts
 0.030 mm 0.0012 in
  • Surface Flatness - Block Deck - Overall
 0.100 mm 0.0039 in
  • Valve Guide Bore - Exhaust
 6.000-6.020 mm 0.2362-0.2370 in
  • Valve Guide Bore - Intake
 6.000-6.020 mm 0.2362-0.2370 in
  • Valve Lifter Bore Diameter - Stationary Lash Adjusters
 12.008-12.030 mm 0.4728-0.4736 in
  • Valve Seat Angle - Relief Surface
 30 Degrees
  • Valve Seat Angle - Seating Surface
 45 Degrees
  • Valve Seat Angle - Undercut Surface
 60 Degrees
  • Valve Seat Runout - Maximum
 0.080 mm 0.0031 in
Lubrication System
  • Oil Pressure - @700RPM 100°C
 140-200 kPa 20-29 psi
Piston Rings
  • Piston Ring End Gap - Top
 0.20-0.35 mm 0.008-0.014 in
  • Piston Ring End Gap - Second
 0.35-0.55 mm 0.014-0.022 in
  • Piston Ring End Gap - Oil Control
 0.25-0.75 mm 0.010-0.030 in
  • Piston Ring to Groove Clearance - Top
 0.04-0.08 mm 0.0015-0.0031 in
  • Piston Ring to Groove Clearance - Second
 0.030-0.070 mm 0.0012-0.0030 in
  • Piston Ring to Groove Clearance - Oil Control
 0.024-0.176 mm 0.0009-0.0069 in
  • Piston Ring Thickness - Top
 1.170-1.190 mm 0.0461-0.0469 in
  • Piston Ring Thickness - Second
 1.470-1.490 mm 0.0579-0.0587 in
  • Piston Ring Thickness - Oil Control - Rail
 0.447-0.473 mm 0.0176-0.0186 in
  • Piston Ring Thickness - Oil Control - Spacer
 0.960-1.040 mm 0.0378-0.0409 in
Pistons and Pins
  • Pin - Piston Pin Clearance to Connecting Rod Bore
 0.007-0.020 mm 0.0003-0.0008 in
  • Pin - Piston Pin Clearance to Piston Pin Bore
 0.005-0.013 mm 0.0002-0.0005 in
  • Pin - Piston Pin Diameter
 23.997-24.000 mm 0.9448-0.9449 in
  • Pin - Piston Pin End Play
 0.263-1.164 mm 0.0104-0.0458 in
  • Piston - Piston Diameter - @14.8 mm up
 85.968-85.982 mm 3.3846-3.3851in
  • Piston - Piston Pin Bore Diameter
 24.005-24.010 mm 0.9451-0.9453 in
  • Piston - Piston Ring Groove Width - Top
 1.23-1.25 mm 0.0484-0.0492 in
  • Piston - Piston Ring Groove Width - Second
 1.52-1.54 mm 0.0598-0.0606 in
  • Piston - Piston Ring Groove Width - Oil Control
 2.01-2.03 mm 0.0791-0.0799 in
  • Piston - Piston to Bore Clearance - w/o polymer
 0.010-0.041 mm 0.0004-0.0016 in
Valve System
  • Valves - Valve Face Angle
 45 Degrees
  • Valves - Valve Face Runout - Maximum
 0.040 mm 0.0016 in
  • Valves - Valve Seat Runout - Maximum
 0.080 mm 0.0031 in
  • Valves - Valve Seat Gauge Ball Height - Exhaust
 12.746-12.976 mm 0.4912-0.5038 in
  • Valves - Valve Seat Gauge Ball Height - Intake
 12.425-12.653 mm 0.4892-0.4981 in
  • Valves - Valve Stem Diameter - Exhaust
 5.945-5.965 mm 0.2341-0.2348 in
  • Valves - Valve Stem Diameter - Intake
 5.955-5.975 mm 0.2344-0.2352 in
  • Valves - Valve Stem Installed Height
 Check and Record
  • Valves - Valve Stem to Guide Clearance - Exhaust
 0.038-0.082 mm 0.0015-0.0032 in
  • Valves - Valve Stem to Guide Clearance - Intake
 0.030-0.057 mm 0.0012-0.0022 in
  • Valve Lash Adjusters - Valve Lash Adjuster Diameter - Stationary Lash Adjuster
 11.986-12.000 mm 0.0005-0.0020 in
  • Valve Lash Adjusters - Valve Lash-Adjuster-to-Bore Clearance - Stationary Lash Adjuster
 0.013-0.051 mm 3.2210-3.2299 in
  • Valve Springs - Valve Spring Installed Height
 35.0 mm 1.3779 in
  • Valve Springs - Valve Spring Load - Closed - @35 mm
 247-273 N 56-61 lb
  • Valve Springs - Valve Spring Load - Open - @24 mm
 598-662 N 134-149 lb
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