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Home › GMC › 2021 › Acadia SL › Repair and Diagnosis › Engine Mechanical › Engine Mechanical - 2.5L (LCV) › Specifications › Engine Mechanical Specifications

Engine Mechanical Specifications

Application Specification
Metric English
General Data
  • Engine Type
 Inline 4 Cylinder
  • Displacement
 2.5 L 152 CID
  • RPO
 LCV
  • Liter (VIN)
 -
  • Bore
 87.992 - 88.008 mm 3.4642 - 3.4649 in
  • Stroke
 101 mm 3.976 in
  • Compression Ratio
 11.20
  • 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
 87.992 - 88.008 mm 3.4642 - 3.4649 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 within every 100 mm 0.002 in within every 3.937 in
Piston Deck Height - Below Deck 1.105 - 1.675 mm 0.0435 - 0.0659 in
Camshaft
  • Camshaft End Play
 0.040 - 0.307 mm 0.0016 - 0.0121 in
  • Camshaft Journal Diameter - Journal 1
 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 - 0.065 mm 0.0012 - 0.0026 in
  • Connecting Rod Bore Diameter - Bearing End
 52.118 - 52.134 mm 2.0519 - 2.05252 in
  • Connecting Rod Bore Diameter - Pin End
 22.007 - 22.017 mm 0.8664 - 0.8668 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
  • Connecting Rod Pin Taper - Maximum Diameter
 0.008 mm 0.0003 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
  • Crankshaft Main Journal Taper - Maximum Diameter
 0.008 mm 0.0003 in
  • Crankshaft Thrust Bearing Width
 20.30 - 20.45 mm 0.799 - 0.805
Cylinder Head
  • Surface Flatness - Block Deck - in 25 mm
 0.025 mm 0.0001 in
  • Surface Flatness - Block Deck - in 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 - @ 700 RPM 100°C
 154 - 220 kPa 22 - 32 psi
  • Oil Capacity
 4.7L 5.0 quarts
Piston Rings
  • Piston Ring End Gap - Top
 0.15 - 0.25 mm 0.006 - 0.010 in
  • Piston Ring End Gap - Second
 0.20 - 0.45 mm 0.008 - 0.018 in
  • Piston Ring End Gap - Oil Control
 0.15 - 0.65 mm 0.006 - 0.026 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
 0.058 - 0.207 mm 0.0023 - 0.0081 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 - Maximum
 0.490 mm 0.0193 in
  • Piston Ring Thickness - Oil Control - Spacer
 0.929 - 1.006 mm 0.0366 - 0.0396 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
 0.002 - 0.010 mm 0.0001 - 0.0004 in
  • Pin - Piston Pin Diameter
 21.997 - 22.000 mm 0.8660 - 0.8661 in
  • Pin - Piston Pin End Play
 0.413 - 1.269 mm 0.0163 - 0.0500 in
  • Piston - Piston Diameter - @ 14.8 mm up
 87.968 - 87.982 mm 3.4633 - 3.4638 in
  • Piston - Piston Pin Bore Diameter
 22.002 - 22.007 mm 0.8662 - 0.8664 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
 10.885 - 11.115 mm 0.4285 - 0.4376 in
  • Valves - Valve Seat Gauge Ball Height - Intake
 9.086 - 9.314 mm 0.3577 - 0.3667 in
  • Valves - Valve Stem Diameter - Exhaust
 5.945 - 5.965 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
 0.035 - 0.075 mm 0.0013 - 0.0030 in
  • Valves - Valve Stem to Guide Clearance - Intake
 0.025 - 0.065 mm 0.0010 - 0.0026 in
  • Valve Lash Adjusters - Valve Lash Adjuster Diameter - Stationary Lash Adjuster
 11.986 - 12.000 mm 0.4719 - 0.4724 in
  • Valve Lash Adjusters - Valve Lash-Adjuster-to-Bore Clearance - Stationary Lash Adjuster
 0.022 - 0.030 mm 0.5588 - 0.7620 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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