GM Service Manual Online
For 1990-2009 cars only

Engine Mechanical Specifications LM7 VIN T/L59 VIN Z

Application

Metric

English

General Data

  • Engine Type

V8

  • Displacement

5.3L

325 CID

  • Bore

96.000-96.018 mm

3.779-3.78 in

  • Stroke

92.0 mm

3.622 in

  • Compression Ratio

9.45:1

  • 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 Bearing Diameter

55.063-55.088 mm

2.1678-2.1688 in

  • Camshaft Journal-to-Bearing Clearance

0.023-0.098 mm

0.0009-0.0038 in

  • Camshaft Journal Diameter Out-of-Round

0.025 mm

0.001 in

  • Camshaft Lobe Lift (Intake)

6.82 mm

0.268 in

  • Camshaft Lobe Lift (Exhaust)

6.96 mm

0.274 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)

0.002 in (Maximum)

  • Crankshaft Thrust Wall Runout

0.025 mm

0.001 in

  • Crankshaft Thrust Wall Width (Production)

26.14-26.32 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)

96.0-96.018 mm

3.779-3.78 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

4.732 in

  • Cylinder Head Intake Manifold Deck Flatness

0.08 mm

0.003 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 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 Deck Face)

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 (7.87 in) 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

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

0.07 mm

0.0028 in

Piston Pin

  • Piston Pin Clearance to Piston Bore (Production)

0.007-0.020 mm

0.00027-0.00078 in

  • Piston Pin Clearance to Piston Bore (Service Limit)

0.007-0.021 mm (Maximum)

0.00027-0.00082 in (Maximum)

  • Piston Pin Diameter

23.997-24.0 mm

0.9447-0.9448 in

  • Piston Pin Fit in Connecting Rod

0.020-0.043 mm (Interference)

0.00078-0.00169 in (Interference)

Piston Rings

  • Piston Compression Ring End Gap (Production--Top) (Measured in Cylinder Bore)

0.23-0.44 mm

0.009-0.017 in

  • Piston Compression Ring End Gap (Production--2nd) (Measured in Cylinder Bore)

0.44-0.70 mm

0.0173-0.0275 in

  • Piston Oil Ring End Gap (Production) (Measured in Cylinder Bore)

0.18-0.75 mm

0.007-0.0295 in

  • Piston Compression Ring End Gap (Service--Top) (Measured in Cylinder Bore)

0.23-0.50 mm  (Maximum)

0.009-0.02 in (Maximum)

  • Piston Compression Ring End Gap (Service--2nd) (Measured in Cylinder Bore)

0.44-0.76 mm (Maximum)

0.0173-0.03 in (Maximum)

  • Piston Oil Ring End Gap-Service Limit (Measured in Cylinder Bore)

0.18-0.81 mm (Maximum)

0.007-0.032 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)

0.04-0.078 mm

0.00157-0.0031 in

  • Piston Oil Ring Groove Clearance (Production)

0.012-0.20 mm

0.0005-0.0078 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)

0.04-0.078 mm (Maximum)

0.00157-0.0031 in (Maximum)

  • Piston Oil Ring Groove Clearance (Service Limit)

0.012-0.20 mm (Maximum)

0.0005-0.0078 in (Maximum)

Valve System

  • Valve Face Angle

45 degrees

  • Valve Guide Installed Height (Measured from the Cylinder Head Spring Seat Surface to the Top of the Valve Guide)

17.32 mm

0.682 in

  • Valve Lash

Net Lash - No Adjustment

  • Valve Lift (Exhaust)

11.85 mm

0.466 in

  • Valve Lift (Intake)

11.6 mm

0.457 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)

7.955-7.976 mm

0.3132-0.314 in

  • Valve Stem Diameter (Service)

7.95 mm (Minimum)

0.313 in (Minimum)

  • Valve Stem Oil Seal Installed Height (Measured from the Valve Spring Shim to Top Edge of Seal Body - First Design Seal)

18.1-19.1 mm

0.712-0.752 in

Engine Mechanical Specifications LQ4 VIN U/LQ9 VIN N

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 - 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

  • 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 Bearing Diameter

55.063-55.088 mm

2.1678-2.1688 in

  • Camshaft Journal-to-Bearing Clearance

0.023-0.098 mm

0.0009-0.0038 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 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 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 - Piston Diameter - LQ4 Measured Over Skirt Coating

101.606-101.640 mm

4.0002-4.0016 in

  • Piston - Piston Diameter - LQ9 Measured Over Skirt Coating

101.611-101.642 mm

4.0-4.001 in

  • Piston - Piston-to-Bore Clearance - LQ4 Production

-0.022 to +0.03 mm

-0.0009 to +0.0012 in

  • Piston - Piston-to-Bore Clearance - LQ9 Production

-0.022 to +0.030 mm

-0.009 to +0.0012 in

  • Piston - Piston-to-Bore Clearance - LQ4 Service Limit with Skirt Coating Worn Off

0.07 mm

0.0028 in

  • Piston - Piston-to-Bore Clearance -LQ9 Service Limit with Skirt Coating Worn Off

0.08 mm

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

Engine Mechanical Specifications LR4 VIN V

Application

Metric

English

General Data

  • Engine Type

V8

  • Displacement

4.8L

293 CID

  • Bore

96.000-96.018 mm

3.779-3.78 in

  • Stroke

83.0 mm

3.268 in

  • Compression Ratio

9.45:1

  • 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 Bearing Diameter

55.063-55.088 mm

2.1678-2.1688 in

  • Camshaft Journal-to-Bearing Clearance

0.023-0.098 mm

0.0009-0.0038 in

  • Camshaft Journal Diameter Out-of-Round

0.025 mm

0.001 in

  • Camshaft Lobe Lift (Intake)

6.82 mm

0.268 in

  • Camshaft Lobe Lift (Exhaust)

6.96 mm

0.274 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

0.0043-0.02 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 (Minimum)

2.558 in (Minimum)

  • 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)

0.002 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)

96.0-96.018 mm

3.779-3.78 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 Cylinder 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

0.0031 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 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 Deck Face)

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 (7.87 in) Area that Includes Two Runner Port Openings)

3.0 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

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

0.07 mm

0.0028 in

Piston Pin

  • Piston Pin Clearance to Piston Bore (Production)

0.007-0.020 mm

0.00027-0.00078 in

  • Piston Pin Clearance to Piston Bore (Service Limit)

0.007-0.021 mm (Maximum)

0.00027-0.00082 in (Maximum)

  • Piston Pin Diameter

23.997-24.0 mm

0.9447-0.9448 in

  • Piston Pin Fit in Connecting Rod

0.020-0.043 mm (Interference)

0.00078-0.00169 in (Interference)

Piston Rings

  • Piston Compression Ring End Gap (Production--Top) (Measured in Cylinder Bore)

0.23-0.44 mm

0.009-0.017 in

  • Piston Compression Ring End Gap (Production--2nd) (Measured in Cylinder Bore)

0.44-0.70 mm

0.0173-0.0275 in

  • Piston Oil Ring End Gap (Production) (Measured in Cylinder Bore)

0.18-0.75 mm

0.007-0.0295 in

  • Piston Compression Ring End Gap (Service--Top) (Measured in Cylinder Bore)

0.23-0.50 mm  (Maximum)

0.009-0.02 in (Maximum)

  • Piston Compression Ring End Gap (Service--2nd) (Measured in Cylinder Bore)

0.44-0.76 mm (Maximum)

0.0173-0.03 in (Maximum)

  • Piston Oil Ring End Gap-Service Limit (Measured in Cylinder Bore)

0.18-0.81 mm (Maximum)

0.007-0.032 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)

0.04-0.078 mm

0.00157-0.0031 in

  • Piston Oil Ring Groove Clearance (Production)

0.012-0.20 mm

0.0005-0.0078 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)

0.04-0.078 mm (Maximum)

0.00157-0.0031 in (Maximum)

  • Piston Oil Ring Groove Clearance (Service Limit)

0.012-0.20 mm (Maximum)

0.0005-0.0078 in (Maximum)

Valve System

  • Valve Face Angle

45 degrees

  • Valve Guide Installed Height (Aluminum Head-Measured from the Cylinder Head Spring Seat Surface to the Top of the Valve Guide)

17.32 mm

0.682 in

  • Valve Lash

Net Lash-No Adjustment

  • Valve Lift (Exhaust)

11.85 mm

0.466 in

  • Valve Lift (Intake)

11.6 mm

0.457 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)

7.955-7.976 mm

0.3132-0.314 in

  • Valve Stem Diameter (Service)

7.95 mm (Minimum)

0.313 in (Minimum)

  • Valve Stem Oil Seal Installed Height (Measured from the Valve Spring Shim to Top Edge of Seal Body - First Design Seal)

18.1-19.1 mm

0.712-0.752 in