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Home >> GMC >> 2017 >> Terrain SL, Gas >> Repair and Diagnosis >> Engine Mechanical >> Engine Mechanical - 2.4L (Lea) >> Specifications >> Engine Mechanical Specifications (LAF, LEA, or LUK)

Engine Mechanical Specifications (LAF, LEA, or LUK)

Application Specification
Metric English
General Data
  • Engine Type
 Inline 4 Cylinder
  • Displacement
 2.4 L 146 CID
  • RPO
 LAF
LEA
LUK
  • VIN
 Passenger Car: C
Truck: W
  • Bore
 87.992 - 88.008 mm 3.4642 - 3.4649 in
  • Stroke
 98 mm 3.861 in
  • Compression Ratio
 11.16:1
  • Spark Plug Gap
 0.75 - 0.90 mm 0.030 - 0.035 in
Balance Shaft
  • Bearing Clearance
 0.030 - 0.060 mm 0.0012 - 0.0024 in
  • Bearing Diameter - Inside - Carrier
 20.050 - 20.063 mm 0.7894 - 0.7899 in
  • Bearing Diameter - Outside - Carrier
 41.975 - 41.995 mm 1.6526 - 1.6534 in
  • Bearing Journal Diameter
 20.000 - 20.020 mm 0.7874 - 0.7882 in
  • Bushing Clearance
 0.033 - 0.102 mm 0.0013 - 0.0040 in
  • Bushing Diameter - Inside
 36.776 - 36.825 mm 1.4479 - 1.4498 in
  • Bushing Journal Diameter
 36.723 - 36.743 mm 1.4458 - 1.4466 in
  • End Play
 0.050 - 0.300 mm 0.0020 - 0.0118 in
Block
  • Balance Shaft Bearing Bore Diameter - Carrier
 42.000 - 42.016 mm 1.6535 - 1.6542 in
  • Balance Shaft Bushing Bore Diameter
 40.763 - 40.776 mm 1.6048 - 1.6054 in
  • Crankshaft Main Bearing Bore Diameter
 64.068 - 64.082 mm 2.5224 - 2.5229 in
  • Cylinder Bore Diameter
 87.992 - 88.008 mm 3.4642 - 3.4649 in
  • Cylinder Bore Out-of-Round - Maximum
 0.010 mm 0.0004 in
  • Cylinder Bore Taper - Maximum
 0.010 mm 0.0004 in
  • Cylinder Head Deck Surface Flatness - Longitude
 0.050 mm 0.002 in
  • Cylinder Head Deck Surface Flatness - Overall
 0.08 mm 0.0031 in
  • Cylinder Head Deck Surface Flatness - Transverse
 0.030 mm 0.0012 in
Camshaft
  • Camshaft End Play
 0.040 - 0.144 mm 0.0016 - 0.0057 in
  • Camshaft Journal Diameter
 26.935 - 26.960 mm 1.0604 - 1.0614 in
  • Camshaft Thrust Surface
 21.000 - 21.052 mm 0.8268 - 0.8252 in
Connecting Rod
  • Connecting Rod Bearing Clearance
 0.029 - 0.073 mm 0.0011 - 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
 20.007 - 20.017 mm 0.7877 - 0.7881 in
  • Connecting Rod Side Clearance
 0.070 - 0.370 mm 0.0028 - 0.0146 in
  • Connecting Rod Straightness - Bend - Maximum
 0.021 mm 0.0083 in
  • Connecting Rod Straightness - Twist - Maximum
 0.04 mm 0.0157 in
Crankshaft
  • Connecting Rod Journal Diameter
 48.999 - 49.015 mm 1.9291 - 1.9297 in
  • Crankshaft End Play
 0.050 - 0.380 mm 0.0012 - 0.0150 in
  • Crankshaft Main Bearing Clearance
 0.031 - 0.067 mm 0.0012 - 0.0026 in
  • Crankshaft Main Journal Diameter
 55.993 - 56.009 mm 2.2044 - 2.2051 in
Cylinder Head
  • Overall Height - Minimum
 128.9 mm 5.07 in
  • Surface Flatness - Block Deck - Longitude
 0.050 mm 0.002 in
  • Surface Flatness - Block Deck - Overall
 0.1 mm 0.004 in
  • Surface Flatness - Block Deck - Transverse
 0.030 mm 0.0012 in
  • Valve Guide Bore - Exhaust
 6.000 - 6.012 mm 0.2362 - 0.2367 in
  • Valve Guide Bore - Intake
 6.000 - 6.012 mm 0.2362 - 0.2367 in
  • Valve Lifter Bore Diameter - Stationary Lash Adjusters
 12.013 - 12.037 mm 0.4730 - 0.4739 in
  • Valve Seat Angle - Relief Surface
 30 Degrees
  • Valve Seat Angle - Seating Surface
 45 Degrees
  • Valve Seat Angle - Undercut Surface
 60 Degrees
  • Valve Seat Roundness - Maximum
 0.025 mm 0.0010 in
  • Valve Seat Runout - Maximum
 0.080 mm 0.0031 in
  • Valve Seat Width - Exhaust Seating Surface
 1.600 mm 0.0630 in
  • Valve Seat Width - Intake Seating Surface
 1.200 mm 0.0472 in
Lubrication System
  • Oil Pressure - Minimum - @ 1000 RPM @ 90°C (194°F)
 206.84 - 482.63 kPa 30 - 70 psi
  • Oil Capacity
 4.7L 5.0 quarts
Piston Rings
  • Piston Ring End Gap - First Compression Ring
 0.15 - 0.25 mm 0.006 - 0.010 in
  • Piston Ring End Gap - Second Compression Ring
 0.20 - 0.45 mm 0.008 - 0.018 in
  • Piston Ring End Gap - Oil Control Ring - Rails
 0.15 - 0.65 mm 0.006 - 0.026 in
  • Piston Ring to Groove Clearance - First Compression Ring
 0.04 - 0.08 mm 0.0015 - 0.0031 in
  • Piston Ring to Groove Clearance - Second Compression Ring
 0.030 - 0.070 mm 0.0012 - 0.0030 in
  • Piston Ring to Groove Clearance - Oil Control Ring
 0.058 - 0.207 mm 0.0023 - 0.0081 in
  • Piston Ring Thickness - First Compression Ring
 1.170 - 1.190 mm 0.0461 - 0.0469 in
  • Piston Ring Thickness - Second Compression Ring
 1.471 - 1.490 mm 0.0579 - 0.0587 in
  • Piston Ring Thickness - Oil Control Ring - Rail - Maximum
 0.473 mm 0.0186 in
  • Piston Ring Thickness - Oil Control Ring - Spacer - Rail
 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
 0.004 - 0.012 mm 0.0002 - 0.0005 in
  • Pin - Piston Pin Diameter
 19.997 - 20.000 mm 0.7873 - 0.7874 in
  • Pin - Piston Pin End Play
 0.410 - 1.266 mm 0.0161 - 0.0498 in
  • Piston - Piston Diameter - @ 14.5 mm up
 87.967 - 87.982 mm 3.4633 - 3.4638 in
  • Piston - Piston Pin Bore Diameter
 20.004 - 20.009 mm 0.7876 - 0.7878 in
  • Piston - Piston Ring Groove Width - Oil Control
 2.01 - 2.03 mm 0.0791 - 0.0799 in
  • Piston - Piston Ring Groove Width - Second
 1.52 - 1.54 mm 0.0598 - 0.0606 in
  • Piston - Piston Ring Groove Width - Top
 1.23 - 1.25 mm 0.0484 - 0.0492 in
  • Piston - Piston to Bore Clearance
 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 Face Seat Width - Exhaust
 1.6000 mm 0.06299 in
  • Valves - Valve Face Seat Width - Intake
 1.2000 mm 0.04724 in
  • Valves - Valve Head Diameter - Exhaust
 29.950 - 30.250 mm 1.1791 - 1.1909 in
  • Valves - Valve Head Diameter - Intake
 34.950 - 35.250 mm 1.3760 - 1.4154 in
  • Valves - Valve Head O.D. and Chamfer Height - Exhaust
 1.1174 mm 0.04399 in
  • Valves - Valve Head O.D. and Chamfer Height - Intake
 1.0526 mm 0.04144 in
  • Valves - Valve Stem Diameter - Exhaust
 5.935 - 5.950 mm 0.2337 - 0.2343 in
  • Valves - Valve Stem Diameter - Intake
 5.955 - 5.970 mm 0.2344 - 0.2355 in
  • Valves - Valve Stem Height - Closed
 32.500 mm 1.2795 in
  • Valves - Valve Stem to Guide Clearance - Exhaust
 0.050 - 0.077 mm 0.0020 - 0.0026 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 Rocker Arms - Rocker Arm Ratio
 1.68 to 1
  • Valve Rocker Arms - Rocker Arm Roller Diameter
 17.740 - 17.800 mm 0.6987 - 0.7008 in
  • Valve Springs - Valve Spring Free Length
 41.400 - 44.200 mm 1.6299 - 1.7402 in
  • Valve Springs - Valve Spring Installed Height - Closed
 32.500 mm 1.2795 in
  • Valve Springs - Valve Spring Installed Height - Open
 22.500 mm 0.8858 in
  • Valve Springs - Valve Spring Load - Closed - @ 32.5 mm
 245.0 - 271.0 N 55 - 61 lb
  • Valve Springs - Valve Spring Load - Open - @ 22.5 mm
 525.0 - 575.0 N 118 - 129 lb
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