Engine Mechanical Specifications (LQ4 VIN U/LQ9 VIN N)

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ENGINE MECHANICAL SPECIFICATIONS - LQ4 VIN U/LQ9 VIN N

Application		Metric	English
General Data
	Engine Type	V8
	Displacement	6.0 L	364 CID
	Bore	101.618-101.636 mm	4.0007-4.0014 in
	Stroke	92.0 mm	3.622 in
	Compression Ratio - LQ4 VIN U	9.40:1
	Compression Ratio - LQ9 VIN N	10.0:1
	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
		41 kPa at 1,000 engine RPM	6 psig at 1,000 engine RPM
	Oil Pressure (Minimum-Hot)	124 kPa at 2,000 engine RPM	18 psig at 2,000 engine RPM
		165 kPa at 4,000 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 - LQ4	0.004-0.008 mm	0.00015-0.0003 in
	Connecting Rod Bearing Bore Out-of-Round - LQ9	0.006 mm	0.00023 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	1.029-1.0315 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 156 mm (6.1 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	0.13 mm	0.005 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	0.08 mm	0.003 in
Engine Block
	Camshaft Bearing Bore Diameters	55.063-55.088 mm	2.168-2.169 in
	Engine Block Cylinder Head Deck Surface Flatness (Measured within a 156 mm (6.1 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	0.006 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 Diameter - LQ4 Measured at Size Point	101.58-101.598 mm	3.999-3.999 in
	Piston Diameter - LQ9 Measured Over Skirt Coating	101.611-101.642 mm	4.000-4.001 in
	Piston-to-bore Clearance - LQ4 Production	0.02-0.056 mm	0.0008-0.0022 in
	Piston-to-bore Clearance - LQ4 Service Limit	0.02-0.081 mm	0.0008-0.0032 in
	Piston-to-bore Clearance - LQ9 Production	0.024-0.025 mm	0.00094-0.00098 in
	Piston-to-bore Clearance - LQ9 Service Limit With Skirt Coating Worn Off	0.024-0.080 mm	0.00094-0.0031 in
Piston Pin
	Piston Pin Diameter - Press Fit Pin	23.997-24.0 mm	0.9447-0.9448 in
	Piston Pin Diameter - Full-Floating Pin	23.952-23.955 mm	0.943-0.943 in
	Piston Pin Fit in Connecting Rod - Press Fit Pin	0.020-0.043 mm (Interference)	0.00078-0.00169 in (Interference)
	Piston Pin Fit in Connecting Rod - Full-Floating Pin Production	0.007-0.020 mm	0.00027-0.00078 in
	Piston Pin Fit in Connecting Rod - Full-Floating Pin Service Limit	0.007-0.022 mm	0.00027-0.00086 in
	Piston Pin to Piston Bore Clearance - LQ4 Production	0.007-0.020 mm	0.00027-0.00078 in
	Piston Pin to Piston Bore Clearance - LQ4 Service Limit	0.007-0.021 mm	0.00027-0.00082 in
	Piston Pin to Piston Bore Clearance - LQ9 Production Measured at Pin End	0.002-0.010 mm	0.00008-0.0004 in
	Piston Pin to Piston Bore Clearance - LQ9 Service Limit Measured at Pin End	0.002-0.015 mm	0.00008-0.0006 in
Piston Rings
	Piston Compression Ring End Gap - LQ4 Production - Top Measured in Cylinder Bore	0.31-0.52 mm	0.0122-0.02 in
	Piston Compression Ring End Gap - LQ4 Production - 2nd Measured in Cylinder Bore	0.51-0.77 mm	0.02-0.03 in
	Piston Oil Ring End Gap - LQ4 Production Measured in Cylinder Bore	0.31-0.87 mm	0.0122-0.034 in
	Piston Compression Ring End Gap - LQ4 Service - Top Measured in Cylinder Bore	0.31-0.59 mm	0.0122-0.023 in
	Piston Compression Ring End Gap - LQ4 Service - 2nd Measured in Cylinder Bore	0.51-0.84 mm	0.02-0.033 in
	Piston Oil Ring End Gap - LQ4 Service Measured in Cylinder Bore	0.31-0.94 mm	0.0122-0.037 in
	Piston Compression Ring End Gap - LQ9 Production - Top Measured in Cylinder Bore	0.31-0.52 mm	0.0122-0.020 in
	Piston Compression Ring End Gap - LQ9 Production - 2nd Measured in Cylinder Bore	0.51-0.77 mm	0.020-0.030 in
	Piston Oil Ring End Gap - LQ9 Production Measured in Cylinder Bore	0.31-0.87 mm	0.0122-0.034 in
	Piston Compression Ring End Gap - LQ9 Service - Top Measured in Cylinder Bore	0.31-0.59 mm	0.0122-0.023 in
	Piston Compression Ring End Gap - LQ9 Service - 2nd Measured in Cylinder Bore	0.51-0.84 mm	0.020-0.033 in
	Piston Oil Ring End Gap - LQ9 Service Measured in Cylinder Bore	0.31-0.94 mm	0.0122-0.037 in
	Piston Compression Ring Groove Clearance - LQ4 Production - Top	0.04-0.08 mm	0.00157-0.0031 in
	Piston Compression Ring Groove Clearance - LQ4 Production - 2nd	0.039-0.079 mm	0.0015-0.0031 in
	Piston Oil Ring Groove Clearance - LQ4 Production	0.015-0.2 mm	0.0006-0.0079 in
	Piston Compression Ring Groove Clearance - LQ4 Service - Top	0.04-0.08 mm	0.00157-0.0031 in
	Piston Compression Ring Groove Clearance - LQ4 Service - 2nd	0.039-0.079 mm	0.0015-0.0031 in
	Piston Oil Ring Groove Clearance - LQ4 Service	0.015-0.2 mm	0.0006-0.0079 in
	Piston Compression Ring Groove Clearance - LQ9 Production - Top	0.035-0.080 mm	0.0014-0.0031 in
	Piston Compression Ring Groove Clearance - LQ9 Production - 2nd	0.034-0.079 mm	0.0013-0.0030 in
	Piston Oil Ring Groove Clearance - LQ9 Production	0.012-0.20 mm	0.00047-0.00078 in
	Piston Compression Ring Groove Clearance - LQ9 Service - Top	0.035-0.080 mm	0.0014-0.0031 in
	Piston Compression Ring Groove Clearance - LQ9 Service - 2nd	0.034-0.079 mm	0.0013-0.0030 in
	Piston Oil Ring Groove Clearance - LQ9 Service	0.012-0.20 mm	0.00047-0.0078 in
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