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Home >> Cadillac >> 2021 >> CT4 V, 4WD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 2.7L (L3B) - Specifications >> Specifications >> Engine Mechanical Specifications

Engine Mechanical Specifications

Application Specification
Metric English
General
  • Engine Type
 4-Cylinder Inline
  • Displacement
 2.7 Liter 165 cu in
  • Valves
 16
  • RPO
 L3B
  • VIN
 K
  • Bore
 92.55 mm 3.63 in
  • Stroke
 102 mm 4.015 in
  • Compression Ratio
 10.01
  • Maximum Power @ Engine Speed
 232 KW / 310 HP @ 5600 RPM
  • Maximum Torque @ Engine Speed
 462 Nm @ 1500-4000 RPM 348 lb ft @ 1500-4000 RPM
  • Idle Speed
 650 RPM
  • No- Load max. Speed
 6100 RPM
  • Compression
 Turbocharger equipped engines - No cylinder reading should be less than 690 kPa (100 psi).
  • Cylinder Leak down test
 Compare the compression readings from all of the cylinders.
  • Firing Order
 1 - 3 - 4 - 2
  • Spark Plug Gap
 0.65 - 0.75 mm 0.025 - 0.029 in
  • Fuel Injection Pressure
 20 Mpa 2900 Psi
Engine Block
  • Engine Block Height
 228 mm 8.98 in
  • Engine Block Deck Run Out
 0.025 mm 0.001 in
  • Crankshaft Main Bearing Bore Diameter
 56.028 mm 2.2056 - 2.2061 in
  • Cylinder Bore Diameter
 92.25 mm 3.6316*3.6322 in
  • Cylinder Bore Out-of-Round - Maximum
 0.0013 mm 0.0005 in
Camshaft
  • Camshaft Bearing Inside Diameter - Front Number 1
 35.052-35.072 mm 1.38 - 1.381 in
  • Camshaft Bearing Inside Diameter - Middle and Rear Number 2 - 4
 27.552-27.572 mm 1.085 - 1.086 in
  • Camshaft End Play
 0.075-0.195 mm 0.003 - 0.008 in
  • Camshaft Journal Diameter - Front Number 1
 34.988-35.012 mm 1.378 - 1.379 in
  • Camshaft Journal Diameter - Middle and Rear Number 2 - 4
 27.488-27.512 mm 1.082 - 1.083 in
  • Camshaft Journal Out-of-Round
 0.006 mm 0.0002 in
  • Camshaft Journal to Bore Clearance
 0.04 - 0.084 mm 0.0016 - 0.0033 in
  • Camshaft Lobe Lift - Exhaust AFM
 0
  • Camshaft Lobe Lift - Exhaust Non AFM
 6.03 mm 0.238 in
  • Camshaft Lobe Lift - Intake AFM
 0
  • Camshaft Lobe Lift - Intake Non AFM
 5.94 - 4.43 mm 0.234 - 0.174 in
  • Camshaft Runout - Front and Rear Number 1 and 4
 0.025 mm 0.001 in
  • Camshaft Runout - Middle 2 and 3
 N/A
  • Valve Lift - Exhaust AFM
 0
  • Valve Lift - Exhaust Non AFM
 10.38 mm 0.409 in
  • Valve Lift - Intake AFM
 0
  • Valve Lift - Intake Non AFM
 10.28 - 7.38 mm 0.4048 - 0.2906 in
Connecting Rod
  • Connecting Rod Bearing Clearance
    
  • Connecting Rod Bore Diameter - Bearing End
 54.180 - 54.196 mm 2.133 - 2.134 in
  • Connecting Rod Bore Diameter - Pin End - Production
 22.077 - 22.017 mm 0.870 - 0.867 in
  • Connecting Rod Bore Diameter - Pin End - Service Maximum
 22.025 mm 0.8671 in
  • Connecting Rod Length - Center to Center
 146.65 - 146.75 mm 5.734 - 5.778 in
  • Connecting Rod Side Clearance
 0.095 - 0.0355 mm 0.0037 - 0.0014 in
  • Connecting Rod Width - Bearing End
  • Production
 21.57 - 21.58 mm 0.8492 - 0.8496 in
  • Service
 21.57 - 21.58 mm 0.8492 - 0.8496 in
  • Connecting Rod Width - Pin End
  • Production
 21.57 - 21.58 mm 0.8492 - 0.8496 in
  • Service
 21.57 - 21.58 mm 0.8492 - 0.8496 in
Crankshaft
  • Connecting Rod Journal Diameter
 50.992 - 51.008 mm 2.009 - 2.008 in
  • Connecting Rod Journal Out-of-Round
 0.005 mm 0.0001 in
  • Connecting Rod Journal Taper
 0.008 mm 0.0003 in
  • Connecting Rod Journal Width
    
  • Production
 21.72 - 21.88 mm 0.855 - 0.8614 in
  • Service
 21.72 - 21.88 mm 0.855 - 0.8614 in
  • Crankshaft End Play
 0.084 - 0.316 mm 0.0033 - 0.0124 in
  • Crankshaft Main Bearing Clearance
 0.035 - 0.055 mm 0.0014 - 0.0022 in
  • Crankshaft Main Journal Diameter
 50.992 - 51.008 mm 2.0075 - 2.0081 in
  • Crankshaft Main Journal Out-of-Round
 0.005 mm 0.0001 in
  • Crankshaft Main Journal Taper
 0.008 mm 0.0003 in
  • Crankshaft Main Journal Thrust Wall
  • Runout
 0.04 mm 0.002 in
  • Square
 0.01 mm 0.0004 in
  • Crankshaft Main Journal Width, #2, 3, 5
  • Production
 21.72 - 21.88 mm 0.855 - 0.8614 in
  • Service
 21.72 - 21.88 mm 0.855 - 0.8614 in
  • Crankshaft Main Journal Width, #4
  • Production
 23.274 - 23.326 mm 0.9162 - 0.9183 in
  • Service
 23.274 - 23.326 mm 0.9162 - 0.9183 in
  • Crankshaft Pilot Bearing Bore Diameter
 20.97 - 21.00 mm 0.826 - 0.827 in
  • Crankshaft Rear Flange Runout
 0.025 mm 0.001 in
  • Crankshaft Reluctor Ring Runout - Maximum
 N/A
  • Crankshaft Intermediate Main Runout
 0.04 mm 0.002 in
  • Crankshaft Thrust Surface - Height Diameter
 72.5 - 73.5 mm 2.854 - 2.893 in
Cylinder Head
Valve Guide Bore - Exhaust 10.76 mm 0.4236 in
Valve Guide Bore - Intake 11.01 mm 0.4335 in
Valve Guide Installed Height 16.3 mm 0.6417 in
Valve Seat Width - Exhaust Seating Surface 1.2 mm 0.0472 in
Valve Seat Width - Exhaust Relief Surface    
Valve Seat Width - Intake Seating Surface 1.75 mm 0.0689 in
Valve Seat Width - Intake Relief Surface    
Valve Lifter Bore Diameter    
  • Surface Flatness - Block Deck - Longitude
 If the deck surface is out of specification, replace the cylinder head. Do not machine the cylinder head.
  • Surface Flatness - Block Deck - Transverse
 If the deck surface is out of specification, replace the cylinder head. Do not machine the cylinder head.
Lubrication System
  • Engine Oil pressure @ Pressure Sensor Location @ 1500 RPM
 230 - 170 Kpa 33.36 - 24.66 Psi
  • Engine Oil pressure @ Oil Filter Adapter @ 1500 RPM
 230 - 180 Kpa 33.36 - 26.11 Psi
Piston Cooling Jet Valve Opening Pressure    
Piston Rings
Piston Ring End Gap
First Compression Ring - Nominal 0.25 - 0.30 mm .009843 -.011811 in
First Compression Ring - Maximum, Ring in Bore 0.325 mm 0.012795 in
Second Compression Ring - Nominal 0.35-0.45 mm .013780-.017717 in
Second Compression Ring - Maximum, Ring in Bore 0.475 mm 0.0187 in
Oil Control Ring 0.10 -0.35 mm .003937 -.013780 in
Piston Ring to Groove Clearance
First Compression Ring 0.04 - 0.08 mm 0.001575 - 0.003150 in
Second Compression Ring 0.03 - 0.07 mm 0.00118 - 0.002756 in
Oil Control Ring 0 - 0.33 mm 0 - 0.013110 in
Piston Ring Thickness
First Compression Ring 1.17 - 1.19 mm 0.046063 - 0.04685 in
Second Compression Ring 1.17 - 1.19 mm 0.046063 - 0.04685 in
Oil Control Ring 1.22 - 1.51 mm 0.048031 - 0.059449 in
Piston
Piston Diameter - Measured Over Skirt Coating 92.203 - 92.237 mm 3.630039 - 3.631378 in
Piston Diameter - Service Limit Minimum w/more than 10K miles 92.163 mm 3.628465 in
Piston Pin Bore Diameter 22.005 - 22.010 mm 0.866339 - 0.866535 in
Piston Ring Groove Width - First Compression Ring 1.23 - 1.25 mm 0.048425 - 0.049213 in
Piston Ring Groove Width - Second Compression Ring 1.22 - 1.24 mm 0.048031 - 0.048819 in
Piston Ring Groove Width - Oil Control Ring 1.51 - 1.53 mm 0.059449 - 0.060236 in
Piston to Bore Clearance - Production; Measured at Skirt Coating 0.005 - 0.030 mm 0.000197 - 0.001181 in
Piston to Bore Clearance - Service Limit Maximum, w/more than 10k miles 0.050 mm 0.001969 in
Piston Pin
Piston Pin Clearance to Connecting Rod Bore - Production 0.005 - 0.020 mm 0.000197 - 0.000787 in
Piston Pin Clearance to Connecting Rod Bore - Service Maximum 0.025 mm 0.000984 in
Piston Pin Clearance to Piston Pin Bore - Production 0.005 - 0.013 mm 0.000197 - 0.000512 in
Piston Pin Clearance to Piston Pin Bore - Service Maximum 0.02 mm 0.000787 in
Piston Pin Diameter 16.75-17.25 mm 0.659449 - 0.679134 in
Piston Pin Length 54.8-55 mm 2.15748 - 2.165354 in
Valve System
Valve Face Angle 46 +/- 0.25 deg from CL  
Valve Face Runout Intake 0.050, Exh 0.038  
  • Valve Face Width - Exhaust
 DO NOT GRIND, REPLACE VALVE DO NOT GRIND, REPLACE VALVE
  • Valve Face Width - Intake
 DO NOT GRIND, REPLACE VALVE DO NOT GRIND, REPLACE VALVE
Valve Head Diameter - Exhaust 32 mm 1.260 in
Valve Head Diameter - Intake 37.55 mm 1.476 in
Valve Installed Height    
Valve Length - Exhaust 103.18 mm 4.062 in
Valve Length - Intake 112.04 mm 4.411 in
Valve Seat Angle - Seating Surface 90 degree +/-1 Degree
Valve Seat Angle - Relief Surface    
Valve Seat Roundness - Maximum 0.018 mm 0.0007 in
Valve Seat Runout - Maximum 0.08 mm 0.0031 in
Valve Stem Diameter - Exhaust 5.965 mm 0.2348 in
Valve Stem Diameter - Intake 5.955 mm 0.2344 in
Valve Stem-to-Guide Clearance - Exhaust 0.035-0.075 mm 0.0014 - 0.0030 in
Valve Stem-to-Guide Clearance - Intake 0.025-0.065 mm 0.00098 - 0.0026 in
Valve Lifters - Stationary Hydraulic Lash Adjuster (SHLA)
Valve Lifter (SHLA) Diameter 11.993 mm 0.4722 in
Valve Lifter (SHLA)-to-Bore Clearance    
Rocker Arms    
Valve Rocker Arm Ratio 1.7 mm 0.067 in
Valve Rocker Arm Roller Diameter 23 mm 0.906 in
Valve Springs
Valve Spring Coil Thickness 3.1 x 3.88 mm  
Valve Spring Diameter - Inside Top 12.45 +/- 0.25 mm  
Valve Spring Diameter - Inside Bottom 17.8 +/- 0.25 mm  
Valve Spring Free Length 53.58 +/- 1.5 mm  
Valve Spring Installed Height - Closed Intake 40.82, Exh 39 mm  
Valve Spring Installed Height - Open Intake 30.42 Exh 26.5 mm  
Valve Spring Load - Closed Intake 282N Exh 330N  
Valve Spring Load - Open Intake 565N Exh 625N  
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