Engine Mechanical Specifications (LR4 VIN V)

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ENGINE MECHANICAL SPECIFICATIONS (LR4 VIN V)

Application		Specification
Application		Metric	English
General
	Engine Type	V8
	Displacement	4.8L	293 CID
	RPO	LR4
	VIN	V
	Bore	96.0-96.018 mm	3.779-3.78 in
	Stroke	83.0 mm	3.268 in
	Compression Ratio	9.47:1
	Firing Order	1-8-7-2-6-5-4-3
	Spark Plug Gap	1.524 mm	0.06 in
Block
	Camshaft Bearing Bore Diameter	55.063-55.088 mm	2.168-2.169 in
	Crankshaft Main Bearing Bore Diameter	69.871-69.889 mm	2.75-2.751 in
	Crankshaft Main Bearing Bore Out-of-Round	0.006 mm	0.0002 in
	Cylinder Bore Diameter	96.0-96.018 mm	3.779-3.78 in
	Cylinder Bore Taper - Thrust Side	0.018 mm	0.0007 in
	Cylinder Head Deck Height - Measuring from the Centerline of Crankshaft to the Deck Face	234.57-234.82 mm	9.235-9.245 in
	Cylinder Head Deck Surface Flatness - Measured Within a 152.4 mm (6.0 in) Area	0.11 m	0.004 in
	Cylinder Head Deck Surface Flatness - Measuring the Overall Length of the Block Deck	0.22 mm	0.008 in
	Valve Lifter Bore Diameter	21.417-21.443 mm	0.843-0.844 in
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 Out-of-Round	0.025 mm	0.001 in
	Camshaft Lobe Lift - Exhaust	6.96 mm	0.274 in
	Camshaft Lobe Lift - Intake	6.82 mm	0.268 in
	Camshaft Runout - Measured at the Intermediate Journals	0.05 mm	0.002 in
Connecting Rod
	Connecting Rod Bearing Clearance - Production	0.023-0.065 mm	0.0009-0.0025 in
	Connecting Rod Bearing Clearance - Service	0.023-0.076 mm	0.0009-0.003 in
	Connecting Rod Bore Diameter - Bearing End	56.505-56.525 mm	2.224-2.225 in
	Connecting Rod Bore Out-of-Round - Bearing End - Production	0.004-0.008 mm	0.00015-0.0003 in
	Connecting Rod Bore Out-of-Round - Beating End - Service	0.004-0.008 mm	0.00015-0.0003 in
	Connecting Rod Side Clearance	0.11-0.51 mm	0.00433-0.02 in
Crankshaft
	Connecting Rod Journal Diameter - Production	53.318-53.338 mm	2.0991-2.0999 in
	Connecting Rod Journal Diameter - Service	53.308 mm	2.0987 in
	Connecting Rod Journal Out-of-Round - Production	0.005 mm	0.0002 in
	Connecting Rod Journal Out-of-Round - Service	0.01 mm	0.0004 in
	Connecting Rod Journal Taper - Maximum for 1/2 of Journal Length - Production	0.005 mm	0.0002 in
	Connecting Rod Journal Taper - Maximum for of Journal 1/2 Length - Service	0.02 mm	0.00078 in
	Crankshaft End Play	0.04-0.2 mm	0.0015-0.0078 in
	Crankshaft Main Bearing Clearance - Production	0.02-0.052 mm	0.0008-0.0021 in
	Crankshaft Main Bearing Clearance - Service	0.02-0.065 mm	0.0008-0.0025 in
	Crankshaft Main Journal Diameter - Production	64.993-65.007 mm	2.558-2.559 in
	Crankshaft Main Journal Diameter - Service	64.993 mm	2.558 in
	Crankshaft Main Journal Out-of-Round - Production	0.003 mm	0.000118 in
	Crankshaft Main Journal Out-of-Round - Service	0.008 mm	0.0003 in
	Crankshaft Main Journal Taper- Production	0.01 mm	0.0004 in
	Crankshaft Main Journal Taper - Service	0.02 mm	0.00078 in
	Crankshaft Rear Flange Runout	0.05 mm	0.002 in
	Crankshaft Reluctor Ring Runout - Measured 1.0 mm (0.04 in) Below Tooth Diameter	0.7 mm	0.028 in
	Crankshaft Thrust Surface - Production	26.14-26.22 mm	1.029-1.0315 in
	Crankshaft Thrust Surface - Service	26.22 mm	1.0315 in
	Crankshaft Thrust Surface Runout	0.025 mm	0.001 in
Cylinder Head
	Cylinder Head Height/Thickness - Measured from the Cylinder Head Deck to the Valve Rocker Arm Cover Seal Surface	120.0 mm	4.732 in
	Surface Flatness - Block Deck Measured Within a 152.4 mm (6.0 in) Area	0.08 mm	0.003 in
	Surface Flatness - Block Deck - Measuring the Overall Length of the Cylinder Head	0.1 mm	0.004 in
	Surface Flatness - Exhaust Manifold Deck	0.13 mm	0.005 in
	Surface Flatness - Intake Manifold Deck	0.08 mm	0.0031 in
	Valve Guide Installed Height - Measured from the Spring Seat Surface to the Top of the Guide	17.32 mm	0.682 in
Intake Manifold
	Surface Flatness - Measured at Gasket Sealing Surfaces and Measured Within a 200 mm (7.87 in) Area that Includes Two Runner Port Openings	0.3 mm	0.118 in
Lubrication System
	Oil Capacity - with Filter	5.68 Liters	6.0 Quarts
	Oil Capacity - without Filter	4.73 Liters	5.0 Quarts
	Oil Pressure - Minimum - Hot	41 kPa at 1,000 engine RPM	6 psig at 1,000 engine RPM
		124 kPa at 2,000 engine RPM	18 Psi9 at 2,000 engine RPM
		165 kPa at 4,000 engine RPM	24 psig at 4,000 engine RPM
Oil Pan
	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
	Oil Pan Alignment - to Rear of Engine Block at Transmission Bell Housing Mounting Surface	0.0-0.25 mm	0.0-0.01 in
Piston Rings
	Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore - Production	0.23-0.44 mm	0.009-0.017 in
	Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore - Service	0.23-0.5 mm	0.009-0.0196 in
	Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore - Production	0.44-0.7 mm	0.017-0.027 in
	Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore - Service	0.44-0.76 mm	0.0173-0.30 in
	Piston Ring End Gap - Oil Control Ring - Measured in Cylinder Bore - Production	0.18-0.75 mm	0.007-0.029 in
	Piston Ring End Gap - Oil Control Ring - Measured in Cylinder Bore - Service	0.18-0.81 mm	0.007-0.032 in
	Piston Ring to Groove Clearance - First Compression Ring - Production	0.04-0.085 mm	0.00157-0.00335 in
	Piston Ring to Groove Clearance - First Compression Ring - Service	0.04-0.085 mm	0.00157-0.00335 in
	Piston Ring to Groove Clearance - Second Compression Ring - Production	0.04-0.078 mm	0.00157-0.0031 in
	Piston Ring to Groove Clearance - Second Compression Ring - Service	0.040-0.078 mm	0.00157-0.0031 in
	Piston Ring to Groove Clearance - Oil Control Ring - Production	0.012-0.2 mm	0.0005-0.0078 in
	Piston Ring to Groove Clearance - Oil Control Ring - Service	0.012-0.2 mm	0.0005-0.0078 in
Pistons and Pins
	Piston - Piston Diameter - Measured Over Skirt Coating	96.002-96.036 mm	3.779-3.78 in
	Piston - Piston to Bore Clearance - Production	-0.036 to 0.016 mm	-0.0014 to 0.0006 in
	Piston - Piston to Bore Clearance - Service Limit with Skirt Coating Worn Off	0.071 mm	0.0028 in
	Pin - Piston Fit in Connecting Rod Bore	0.02-0.043 mm - interference	0.00078-0.00169 in - interference
	Pin - Piston Pin Clearance to Piston Pin Bore - Production	0.007-0.02 mm	0.00027-0.00078 in
	Pin - Piston Pin Clearance to Piston Pin Bore - Service	0.007-0.021 mm	0.00027-0.00082 in
Pin - Piston Pin Diameter 23.997-24.0 mm 0.9447-0.9448 in
Valve System
	Valves - Valve Face Angle	45 degrees
	Valves - Valve Face Width	1.25 mm	0.05 in
	Valves - Valve Lash	Net Lash - No Adjustment
	Valves - Valve Lift - Intake	11.6 mm	0.457 in
Valves - Valve Lift - Exhaust	11.85 mm	0.466 in
	Valves - Valve Seat Angle	46 degrees
Valves - Valve Seat Runout	0.05 mm	0.002 in
Valves - Valve Seat Width - Exhaust	1.78 mm	0.07 in
Valves - Seat Width - Intake	1.02 mm	0.04 in
Valves - Valve Stem Diameter - Production	7.955-7.976 mm	0.313-0.314 in
Valves - Valve Stem Diameter - Service	7.95 mm	0.313 in
Valves - Stem-to-Guide Clearance - Production - Intake	0.025-0.066 mm	0.001-0.0026 in
Valves - Stem-to-Guide Clearance - Service - Intake	0.093 mm	0.0037 in
	Valves - Stem-to-Guide Clearance - Production - Exhaust 0.025-0.066 mm	0.001-0.0026 in
	Valves - Stem-to-Guide Clearance - Service - Exhaust 0.093 mm	0.0037 in
	Rocker Arms - Valve Rocker Arm Ratio	1.70:1
Valve Springs - Valve Spring Free Length	52.9 mm	2.08 in
Valve Springs - Installed Height	45.75 mm	1.8 in
	Valve Springs - Valve Spring Load - Closed 340 N at 45.75 mm	76 lb at 1.8 in
Valve Springs - Valve Spring Load - Open	980 N at 33.55 mm	220 lb at 1.32 in