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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> Engine Mechanical >> Engine Mechanical - 3.2L >> Specifications >> Engine Mechanical Specifications (LY9)

Engine Mechanical Specifications (LY9)

Engine Mechanical Specifications (LY9)

Application Specification
Metric English
General
  • Engine Type
 V6
  • Displacement
 2.6L
  • RPO
 LY9
  • VIN
 M
  • Bore
 83.2 mm 3.28 in
  • Stroke
 79.6 mm 3.13 in
  • Compression Ratio
 10.0:1
  • Engine Compression Test - Minimum
 690 kPa 100 psi
  • Firing Order
 1-2-3-4-5-6
  • Spark Plug Gap
 1.35 mm 0.053 in
Block
  • Crankshaft Main Bearing Bore Diameter
 72.000-72.013 mm 2.8347-2.83516 in
  • Crankshaft Main Bearing Bore Out-of-Round
 0.02 mm 0.0008 in
Cylinder Bore Diameter
  • Coefficient 8
 83.173-83.185 mm 3.2745-3.2750 in
  • Coefficient 99
 83.185-83.195 mm 3.2750-3.2753 in
  • Coefficient 00
 83.195-83.205 mm 3.2753-3.2758 in
  • Coefficient 01
 83.205-83.215 mm 3.2758-3.2762 in
  • Coefficient 02
 83.215-83.225 mm 3.2762-3.2766 in
  • Cylinder Bore Out-of-Round
 0.065 mm 0.0026 in
  • Cylinder Bore Taper
 0.0065 mm 0.0003 in
  • Cylinder Head Deck Height
 221 mm 8.700 in
  • Cylinder Head Deck Surface Flatness
 0.025 mm per 100 mm 0.0010 in per 3.917 in
Camshaft
  • Belt Deflection
 10 mm 0.394 in
  • Camshaft End Play
 0.04-0.144 mm 0.0016-0.0057 in
  • Camshaft Journal Diameter
 27.939-27.960 mm 1.1000-1.1008 in
  • Camshaft Journal Out-of-Round
 0.04 mm 0.00158 in
  • Camshaft Journal to Bore Clearance
 0.009 mm 0.00035 in
  • Camshaft Lobe Lift - Exhaust
 9.2 mm 0.3622 in
  • Camshaft Lobe Lift - Intake
 9.2 mm 0.3622 in
  • Camshaft Runout
 0.04 mm 0.00158 in
Cooling System
  • Thermostat Full Open Temperature
 107°C 225°F
Connecting Rod
  • Connecting Rod Bearing Clearance
 0.010-0.061 mm 0.00039-0.00240 in
  • Connecting Rod Bore Diameter - Bearing End
 52.000-52.012 mm 2.0473-2.0477 in
  • Connecting Rod Bore Diameter - Pin End
 20.959-20.971 mm 0.8251-0.8256 in
  • Connecting Rod Bore Out-of-Round - Bearing End
 0.003 mm 0.0001 in
  • Connecting Rod Length
 150.7 mm 5.933 in
  • Connecting Rod Side Clearance
 0.07-0.028 mm 0.0027-0.0110 in
Crankshaft
  • Connecting Rod Journal Diameter
 48.990-48.974 mm 1.929-1.928 in
  • Connecting Rod Journal Out-of-Round
 0.003 mm 0.0001 in
  • Crankshaft End Play
 0.100-0.202 mm 0.0039-0.00795 in
  • Crankshaft Main Bearing Clearance
 0.014-0.043 mm 0.00055-0.00169 in
  • Crankshaft Main Journal Diameter
 67.980-67.746 mm 2.676-2.667 in
  • Crankshaft Main Journal Out-of-Round
 0.03 mm 0.00119 in
Cylinder Head
  • Cylinder Head Height/Thickness
 134 mm 5.28 in
  • Surface Flatness - Block Deck
 0.025 mm per 100 mm 0.0010 in per 3.917 in
  • Surface Flatness - Head
 0.025 mm per 100 mm 0.0010 in per 3.917 in
  • Surface Flatness - Exhaust Manifold Deck
 0.025 mm per 100 mm 0.0010 in per 3.917 in
  • Surface Flatness - Intake Manifold Deck
 0.025 mm per 100 mm 0.0010 in per 3.917 in
  • Valve Guide Installed Height
 13.7-14.0 mm 0.05394-0.05512 in
Exhaust Manifold
  • Surface Flatness
 0.025 mm per 100 mm 0.0010 in per 3.917 in
Flywheel
  • Pilot Bearing Installed Depth
 8.75-9.25 mm 0.3445-0.3641 in
Lubrication System
  • Oil Capacity - with Filter
 4.8L 5 Quarts
  • Oil Pressure at Idle - Minimum
 150 kPa 21.7 psi
Oil Pump
  • Inner Gear Tip Clearance
 0.08 mm 0.00026 in
  • Lobe Inner Diameter - Maximum
 0.10 mm 0.0039 in
Piston Rings
Piston Ring End Gap
  • First Compression Ring
 0.30-0.50 mm 0.0118-0.0196 in
  • Second Compression Ring
 0.30-0.50 mm 0.0118-0.0196 in
  • Oil Control Ring
 0.4-1.4 mm 0.00013-0.0551 in
Piston Ring to Groove Clearance
  • First Compression Ring
 0.02-0.06 mm 0.00079-0.00024 in
  • Second Compression Ring
 0.02-0.06 mm 0.00079-0.00024 in
  • Oil Control Ring
 0.02-0.06 mm 0.00079-0.00024 in
Piston Ring Thickness
  • First Compression Ring
 1.5 mm 0.0590 in
  • Second Compression Ring
 1.5 mm 0.0590 in
  • Oil Control Ring
 3.0 mm 0.1181 in
Pistons and Pins
Piston
  • Piston Diameter
  • Coefficient 8
 83.140-83.150 mm 3.2732-3.2736 in
  • Coefficient 99
 83.150-83.160 mm 3.2736-3.2740 in
  • Coefficient 00
 83.160-83.170 mm 3.2740-3.2744 in
  • Coefficient 01
 83.170-83.180 mm 3.2744-3.2748 in
  • Coefficient 02
 83.180-83.190 mm 3.2748-3.2752 in
  • Piston Pin Bore Diameter
 21.007-21.012 mm 0.82705-0.82725 in
  • Piston to Bore Clearance
 0.025-0.045 mm 0.0010-0.0018 in
Pin
  • Piston Pin Clearance to Piston Pin Bore
 0.001-0.015 mm 0.00004-0.0006 in
  • Piston Pin Diameter
 20.99-21.00 mm 0.8263-0.8267 in
Valve System
Valves
  • Valve Face Angle
 90 degrees 40' +15'
  • Valve Face Runout
 0.03 mm 0.00118 in
  • Valve Head Diameter - Exhaust
 29 mm 1.14 in
  • Valve Head Diameter - Intake
 32 mm 1.23 in
  • Valve Installed Height
 39.2 mm 1.543 in
  • Valve Seat Angle
 90 degrees -30'
  • Valve Seat Runout
 0.05 mm 0.002 in
  • Valve Seat Width - Exhaust
 1.4-1.8 mm 0.0551-0.0708 in
  • Valve Seat Width - Intake
 1.0-1.4 mm 0.0394-0.0551 in
  • Valve Stem Diameter - Exhaust
 5.949-5.960 mm 0.2341-0.2346 in
  • Valve Stem Diameter - Intake
 5.955-5.970 mm 0.2345-0.2350 in
  • Valve Stem-to-Guide Clearance - Exhaust
 0.040-0.070 mm 0.0016-0.0028 in
  • Valve Stem-to-Guide Clearance - Intake
 0.030-0.060 mm 0.0012-0.0024 in
Valve Springs
  • Valve Spring Diameter - Inside
 20.2 mm 0.795 in
  • Valve Spring Diameter - Outside
 24.0 mm 0.9445 in
  • Valve Spring Free Length
 41.8 mm 1.65 in
  • Valve Spring Installed Height
 34 mm 1.34 in
  • Valve Spring Load - Closed
 270 N.m @ 34 mm 61 lb @ 1.34 in
  • Valve Spring Load - Open
 655 N.m @ 24 mm 147 lb @ 0.945 in
  • Valve Spring Total Number of Coils
 6.1
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