Dimension & Clearance Specifications - Engine

General Data
Engine Type V-8
Displacement 7.4L (454 CID)
RPO L29
VIN J
Bore 107.95 mm (4.25 inch)
Stroke 101.6 mm (4.00 inch)
Compression Ratio 9.0:1
Spark Plug Gap 0.8890 mm (0.060 inch)

Cylinder Head
Surface Flatness 0.0762 mm (0.003 inch)
Maximum Cylinder Head Block Deck Resurfacing 0.3049 mm (0.012 inch)

Exhaust Manifold
Surface Flatness 0.254 mm (0.010 inch)

Lubrication System
Oil Capacity without Filter Change 5.7 Liters (6.0 Quart)
Oil Pressure (Fully Warmed Oil not Hot) 68.65 kPa @ 600 RPM 172.37 kPa @ 2,000 RPM (10 psi @ 600 RPM) (25 psi @ 2,000 RPM)
Oil Filter System Full Flow
Oil Pump Type Gear Driven

Cylinder Bore
Diameter 107.950-107.968 mm (4.2500-4.2507 inch)
Out-of-Round Production 0.0254 mm [maximum] (0.001 inch) [maximum]
Out-of-Round Service 0.051 mm [maximum] (0.002 inch) [maximum]
Taper Production Thrust Side 0.0127 mm [maximum] (0.0005 inch) [maximum]
Taper Production Relief Side 0.0254 mm [maximum] (0.001 inch) [maximum]
Taper Service 0.0254 mm [maximum] (0.001 inch) [maximum]

Piston
Piston Diameter 1.07891-1.07904 mm (4.2477-4.2482 inch)
Clearance Production 0.0457-0.0762 mm (0.0018-0.0030 inch)
Clearance Service Limit 0.0457-0.219 mm (0.0018-0.0048 inch)

Piston ring compression
Top Groove Production Clearance 0.031-0.074 mm (0.0012-0.0029 inch)
Second Groove Production Clearance 0.031-0.074 mm (0.0012-0.0029 inch)
Service Limit Groove Clearance 0.0991-0.3050 mm (0.0012-0.0039 inch)
Top Ring Production Gap 0.254-0.457 mm (0.010-0.018 inch)
Top Ring Service Limit Gap 0.254-0.711 mm (0.010-0.028 inch)
Second Ring Production Gap 0.406-0.609 mm (0.016-0.024 inch)
Second Ring Service Limit Gap 0.406-0.863 mm (0.016-0.034 inch)

Piston Ring Oil Control
Production Groove Clearance 0.127-0.165 mm (0.0050-0.0065 inch)
Service Limit Groove Clearance 0.127-0.191 mm (0.0050-0.0075 inch)
Production Gap 0.254-0.762 mm (0.010-0.030 inch)
Service Limit Gap 0.254-1.016 mm (0.010-0.040 inch)

Piston Pin
Diameter 25.132-25.137 mm (0.98945-0.98965 inch)
Clearance In Piston Production 0.005-0.017 mm (0.0002-0.0007 inch)
Clearance In Piston Service Limit 0.005-0.025 mm (0.0002-0.0010 inch)
Fit In Rod 0.078-0.053 mm interference (0.0021-0.0031 inch) interference

Crankshaft
Crankshaft Run Out 0.051 mm [maximum] (0.002 inch) [maximum]
Crankshaft Journal Diameter #1, #2, #3, #4, #5 69.804-69.822 mm (2.7482-2.7489 inch)
Crankshaft Journal Taper Production 0.010 mm [maximum] (0.0004 inch) [maximum]
Crankshaft Journal Taper Service Limit 0.025 [maximum] (0.0010 inch) [maximum}
Crankshaft Journal Out-of-Round Production 0.010 mm [maximum] (0.0004 inch) [maximum]
Crankshaft Journal Out-of-round Service Limit 0.025 mm [maximum] (0.0010 inch) [maximum]
Crankshaft Bearing Clearance #1 Production 0.043-0.076 mm (0.0017-0.0030 inch)
Crankshaft Bearing Clearance #2, #3, #4 Production 0.028-0.061 mm (0.0011-0.0024 inch)
Crankshaft Bearing Clearance #5 Production 0.063-0.096 mm (0.0025-0.0038 inch)
Crankshaft Bearing Clearance #1, #2, #3, #4 Service Limit 0.025-0.076 mm (0.0010-0.0030 inch)
Crankshaft Bearing Clearance #5 Service Limit 0.063-0.101 mm (0.0025-0.0040 inch)
Crankshaft End Play 0.127-0.279 mm (0.005-0.011 inch)
Crankshaft Thrust Wall Width 46.1391-46.2153 mm (1.8165-1.8195 inch)
Crankshaft Thrust Wall Maximum Runout 0.025 mm (0.001 inch)
Crankpin Diameter 55.854-55.869 mm (2.1990-2.1996 inch)
Crankpin Taper Production 0.0127 mm (0.005 inch)
Crankpin Taper Service Limit 0.025 mm (0.0010 inch)
Crankpin Out-of-round Production 0.013 mm (0.0005 inch)
Crankpin Out-of-round Service Limit 0.025 mm (0.0010 inch)
Rod Bearing Clearance Production 0.028-0.074 mm (0.0011-0.0029 inch)
Rod Bearing Clearance Service Limit 0.028-0.099 mm (0.0011-0.0039 inch)
Connecting Rod Side Clearance 0.033-0.584 mm (0.0013-0.0230 inch)

Camshaft
Camshaft Run Out 0.051 mm [maximum] (0.002 inch) [maximum]
Lobe Lift Intake 7.115-7.216 mm (0.2801-0.2841 inch)
Lobe Lift Exhaust 7.170-7.272 mm (0.2823-0.2863 inch)
Journal Diameter 49.471-49.522 mm (1.9477-1.9497 inch)
Valve System
Lifter Hydraulic, Roller Followers
Rocker Arm Ratio 1.70:1
Valve Lash Intake Net Lash
Valve Lash Exhaust Net Lash
Valve Margin 0.79 mm [minimum] (0.031 inch) [minimum]
Face Angle (intake & Exhaust) 45 degrees
Seat Angle (intake & Exhaust) 46 degrees
Seat Runout (intake & Exhaust) 0.051 mm [maximum] (0.002 inch) [maximum]
Seat Width Intake 0.762-1.524 mm (0.030-0.060 inch)
Seat Width Exhaust 1.524-2.413 mm (0.060-0.095 inch)
Stem Clearance Production Intake 0.025-0.0737 mm (0.0010-0.0029 inch)
Stem Clearance Production Exhaust 0.030-0.079 mm (0.0012-0.0031 inch)
Stem Clearance Service Intake 0.025-0.094 mm (0.0010-0.0037 inch)
Stem Clearance Service Exhaust 0.030-0.124 mm (0.0012-0.0049 inch)
Valve Spring Pressure Closed 316-351 N @ 46.685 mm (71-79 lbs. @ 1.838 inch)
Valve Spring Pressure Open 1059-1165 N @ 34.213 mm (238-262 lbs. @ 1.347 inch)
Valve Spring Installed Height 46.685-47.479 mm (1.838-1.869 inch)
Maximum Valve Spring Installed Height Shim 0.726 mm (0.030 inch)
Maximum Valve Spring Tension Shim 0.726 mm (0.030 inch)
Maximum Combined Valve Spring Installed Height And Valve Spring Tension Shim
1.524 mm (0.060 inch)