Engine Mechanical Specifications LQ4 VIN U

Application	Metric	English
General Data
Engine Type	V8
Displacement	6.0L	364 CID
Bore	101.618-101.636 mm	4.0007-4.0014 in
Stroke	92.0 mm	3.622 in
Compression Ratio	9.40:1
Firing Order	1-8-7-2-6-5-4-3
Spark Plug Gap	1.524 mm	0.06 in
Lubrication System
Oil Capacity (without Oil Filter Change)	4.73 Liters	5.0 Quarts
Oil Capacity (with Oil Filter Change)	5.68 Liters	6.0 Quarts
Oil Pressure (Minimum--Hot)	41 kPa at 1,000 engine RPM 124 kPa at 2,000 engine RPM 165 kPa at 4,000 engine RPM	6 psig at 1,000 engine RPM 18 psig at 2,000 engine RPM 24 psig at 4,000 engine RPM
Oil Type	5W-30
Camshaft
Camshaft End Play	0.025-0.305 mm	0.001-0.012 in
Camshaft Journal Diameter	54.99-55.04 mm	2.164-2.166 in
Camshaft Journal Diameter Out-of-Round	0.025 mm	0.001 in
Camshaft Lobe Lift (Intake)	6.96 mm	0.274 in
Camshaft Lobe Lift (Exhaust)	7.13 mm	0.281 in
Camshaft Runout (Measured at the Intermediate Journals)	0.05 mm	0.002 in
Connecting Rod
Connecting Rod Bearing Bore Diameter	56.505-56.525 mm	2.224-2.225 in
Connecting Rod Bearing Bore Out-of-Round	0.004-0.008 mm	0.00015-0.0003 in
Connecting Rod Bearing Clearance (Production)	0.023-0.065 mm	0.0009-0.0025 in
Connecting Rod Bearing Clearance (Service Limit)	0.023-0.076 mm	0.0009-0.003 in
Connecting Rod Side Clearance	0.11-0.51 mm	0.00433-0.02 in
Crankshaft
Crankshaft Bearing Clearance (Production)	0.020-0.052 mm	0.0008-0.0021 in
Crankshaft Bearing Clearance (Service)	0.020-0.065 mm	0.0008-0.0025 in
Crankshaft Connecting Rod Journal Diameter (Production)	53.318-53.338 mm	2.099-2.1 in
Crankshaft Connecting Rod Journal Diameter (Service Limit)	53.308 mm (Minimum)	2.0987 in (Minimum)
Crankshaft Connecting Rod Journal Taper (Production)	0.005 mm (Maximum for one half of the Journal Length)	0.0002 in (Maximum for one half of the Journal Length)
Crankshaft Connecting Rod Journal Taper (Service Limit)	0.02 mm (Maximum)	0.00078 in (Maximum)
Crankshaft Connecting Rod Journal Out-of-Round (Production)	0.005 mm	0.0002 in
Crankshaft Connecting Rod Journal Out-of-Round (Service Limit)	0.01 mm	0.0004 in
Crankshaft End Play	0.04-0.2 mm	0.0015-0.0078 in
Crankshaft Main Journal Diameter (Production)	64.993-65.007 mm	2.558-2.5593 in
Crankshaft Main Journal Diameter (Service Limit)	64.993 mm	2.558 in
Crankshaft Main Journal Out-of-Round (Production)	0.003 mm	0.0001 in
Crankshaft Main Journal Out of Round (Service Limit)	0.008 mm	0.0003 in
Crankshaft Main Journal Taper (Production)	0.01 mm	0.0004 in
Crankshaft Main Journal Taper (Service Limit)	0.02 mm	0.00078 in
Crankshaft Reluctor Ring Runout (Measured 1.0 mm (0.04 in) Below the Tooth Diameter)	0.7 mm (Maximum)	0.028 in (Maximum)
Crankshaft Runout (at Rear Flange)	0.05 mm (Maximum)	0.02 in (Maximum)
Crankshaft Thrust Wall Runout	0.025 mm	0.001 in
Crankshaft Thrust Wall Width (Production)	26.14-26.22 mm	1.029-1.032 in
Crankshaft Thrust Wall Width (Service)	26.2 mm (Maximum)	1.0315 in (Maximum)
Cylinder Bore
Cylinder Bore Diameter (Production)	101.618-101.636 mm	4.0007-4.0014 in
Cylinder Head
Cylinder Head Engine Block Deck Flatness (Measured within a 152.4 mm (6.0 in) area)	0.08 mm	0.003 in
Cylinder Head Engine Block Deck Flatness (Measuring the Overall Length of the Cylinder Head)	0.1 mm	0.004 in
Cylinder Head Exhaust Manifold Deck Flatness	0.22 mm	0.008 in
Cylinder Head Height (Measured from the Head Deck to the Valve Rocker Arm Cover Seal Surface)	120.2 mm (Minimum)	4.732 in (Minimum)
Cylinder Head Intake Manifold Deck Flatness	0.22 mm	0.008 in
Engine Block
Camshaft Bearing Bore 1 and 5 Diameter	59.12-59.17 mm	2.327-2.329 in
Camshaft Bearing Bore 2 and 4 Diameter	58.87-58.92 mm	2.317-2.319 in
Camshaft Bearing Bore 3 Diameter	58.62-58.67 mm	2.307-2.309 in
Engine Block Cylinder Head Deck Surface Flatness (Measured within a 152.4 mm (6.0 in) area)	0.11 mm	0.004 in
Engine Block Cylinder Head Deck Surface Flatness (Measuring the Overall Length of the Block Deck)	0.22 mm	0.008 in
Engine Block Cylinder Head Deck Height (Measuring from the Centerline of Crankshaft to the Head Deck)	234.57-234.82 mm	9.235-9.245 in
Main Bearing Bore Diameter (Production)	69.871-69.889 mm	2.750-2.751 in
Main Bearing Bore Diameter Out-of-Round	0.005 mm	0.0002 in
Valve Lifter Bore Diameter (Production)	21.417-21.443 mm	0.843-0.844 in
Intake Manifold
Intake Manifold Cylinder Head Deck Flatness (Measured within a 200 mm Area that Includes Two Runner Port Openings)	0.3 mm	0.118 in
Oil Pan and Front/Rear Cover Alignment
Oil Pan to Rear of Engine Block Alignment (at Transmission Bellhousing Mounting Surface)	0.0-0.25 mm (Maximum)	0.0-0.01 in (Maximum)
Front Cover Alignment (at Oil Pan Surface)	0.0-0.5 mm	0.0-0.02 in
Rear Cover Alignment (at Oil Pan Surface)	0.0-0.5 mm	0.0-0.02 in
Piston
Piston - Piston Diameter - Measured Over Skirt Coating	101.606-101.640 mm	4.0002-4.0016 in
Piston Out-of-Round (Service Limit)	0.018 mm	0.007 in
Piston - Piston to Bore Clearance - Production	-0.022 to +0.03 mm	-0.0009 to +0.0012 in
Piston - Piston to Bore Clearance Service Limit with Skirt Coating Worn Off	0.07 mm	0.0028 in
Piston Pin
Piston Pin Clearance to Piston Bore (Production)	0.012-0.022 mm	0.00047-0.00086 in
Piston Pin Clearance to Piston Bore (Service Limit)	0.012-0.024 mm (Maximum)	0.00047-0.00094 in (Maximum)
Piston Pin Diameter	23.997-24.0 mm	0.9447-0.9448 in
Piston Pin Fit in Connecting Rod	0.02-0.043 mm (Interference)	0.00078-0.00169 in (Interference)
Piston Rings
Piston Compression Ring End Gap (Production--Top) (Measured in Cylinder Bore)	0.25-0.41 mm	0.01-0.016 in
Piston Compression Ring End Gap (Production--2nd) (Measured in Cylinder Bore)	0.46-0.66 mm	0.018-0.026 in
Piston Oil Ring End Gap (Production) (Measured in Cylinder Bore)	0.25-0.75 mm	0.01-0.03 in
Piston Compression Ring End Gap (Service--Top) (Measured in Cylinder Bore)	0.32-0.48 mm (Maximum)	0.0125-0.0189 in (Maximum)
Piston Compression Ring End Gap (Service--2nd) (Measured in Cylinder Bore)	0.53-0.73 mm (Maximum)	0.021-0.029 in (Maximum)
Piston Oil Ring End Gap (Service Limit) (Measured in Cylinder Bore)	0.32-0.82 mm (Maximum)	0.0125-0.032 in (Maximum)
Piston Compression Ring Groove Clearance (Production--Top)	0.04-0.085 mm	0.00157-0.003346 in
Piston Compression Ring Groove Clearance (Production--2nd)	0.04-0.08 mm	0.00157-0.003149 in
Piston Oil Ring Groove Clearance (Production)	0.01-0.22 mm	0.0004-0.00866 in
Piston Compression Ring Groove Clearance (Service --Top)	0.04-0.085 mm (Maximum)	0.00157-0.003346 in (Maximum)
Piston Compression Ring Groove Clearance (Service--2nd)	0.04-0.08 mm (Maximum)	0.00157-0.003149 in (Maximum)
Piston Oil Ring Groove Clearance (Service Limit)	0.01-0.22 mm (Maximum)	0.0004-0.00866 in (Maximum)
Valve System
Valve Face Angle	45 degrees
Valve Lash	Net Lash-No Adjustment
Valve Lift (Exhaust)	12.16 mm	0.479 in
Valve Lift (Intake)	11.79 mm	0.464 in
Valve Lifter	Hydraulic Roller
Valve Margin	1.25 mm	0.05 in
Valve Rocker Arm Ratio	1.70:1
Valve Seat Angle	46 degrees
Valve Seat Runout	0.05 mm (Maximum)	0.002 in (Maximum)
Valve Seat Width (Exhaust)	1.78 mm	0.07 in
Valve Seat Width (Intake)	1.02 mm	0.04 in
Valve Spring Free Length	52.9 mm	2.08 in
Valve Spring Installed Height (Exhaust)	45.75 mm	1.8 in
Valve Spring Installed Height (Intake)	45.75 mm	1.8 in
Valve Spring Pressure (Closed)	340 N at 45.75 mm	76 lb at 1.8 in
Valve Spring Pressure (Open)	980 N at 33.55 mm	220 lb at 1.32 in
Valve Stem Clearance (Production--Exhaust)	0.025-0.066 mm	0.001-0.0026 in
Valve Stem Clearance (Production--Intake)	0.025-0.066 mm	0.001-0.0026 in
Valve Stem Clearance (Service--Exhaust)	0.093 mm (Maximum)	0.0037 in (Maximum)
Valve Stem Clearance (Service--Intake)	0.093 mm (Maximum)	0.0037 in (Maximum)
Valve Stem Diameter (Production--Exhaust)	7.955-7.976 mm	0.3132-0.314 in
Valve Stem Diameter (Production--Intake)	7.955-7.976 mm	0.3132-0.314 in
Valve Stem Diameter (Service--Exhaust)	7.95 mm (Minimum)	0.313 in (Minimum)
Valve Stem Diameter (Service--Intake)	7.95 mm (Minimum)	0.313 in (Minimum)
Valve Stem Oil Seal Installed Height (Measured from the Valve Spring Seat to Top Edge of Seal Body - First Design Seal)	18.1-19.1 mm	0.712-0.752 in