Dimension & Clearance Specifications - Engine

General Data
Engine Type V8
Displacement 5.0L (305 CID)
RPO (VIN Code) L30 (M)
Bore 94.89 mm (3.737 inch)
Stroke 88.39 mm (3.480 inch)
Compression Ratio 9.4:1
Spark Plug Gap 1.52 mm (0.060 inch)
Oil Pressure (Minimum at Normal Operating Temperature) 42 kPa at 1,000 RPM (6 psig at 1,000 RPM); 125 kPa at 2,000 RPM (18 psig at 2,000 RPM); 166 kPa at 4,000 RPM (24 psig at 4,000 RPM)
Camshaft
End Play 0.05 - 0.30 mm (0.002 - 0.012 inch)
Journal Diameter 47.440 - 47.490 mm (1.8677 - 1.8697 inch)
Journal Diameter Out-of-Round 0.025 mm (0.0010 inch)
Lobe Lift (Exhaust) 7.20 - 7.30 mm (0.283 - 0.287 inch)
Lobe Lift (Intake) 6.97 - 7.07 mm (0.274 - 0.278 inch)
Runout 0.065 mm (Maximum) (0.0026 inch (Maximum))
Connecting Rod
Connecting Rod Bearing Clearance (Production) 0.033 - 0.078 mm (0.0013 - 0.0031 inch)
Connecting Rod Bearing Clearance (Service) 0.025 - 0.063 mm (0.0010 - 0.0025 inch)
Connecting Rod Journal Diameter 53.304 - 53.334 mm (2.0986 - 2.0998 inch)
Connecting Rod Journal Out-of-Round (Production) 0.007 mm (Maximum) (0.0003 inch (Maximum))
Connecting Rod Journal Out-of-Round (Service) 0.025 mm (Maximum) (0.0010 inch (Maximum))
Connecting Rod Journal Taper (Production) 0.007 mm (Maximum) (0.0003 inch (Maximum) )
Connecting Rod Journal Taper (Service) 0.025 mm (Maximum) (0.0010 inch (Maximum))
Connecting Rod Side Clearance 0.15 - 0.68 mm (0.006 - 0.027 inch )
Crankshaft
Crankshaft Bearing Clearance (Journal #1-Production) 0.018 - 0.053 mm (0.0007 - 0.0021 inch)
Crankshaft Bearing Clearance (Journal #2, #3, and #4-Production) 0.030 - 0.068 mm (0.0012 - 0.0027 inch)
Crankshaft Bearing Clearance (Journal #5-Production) 0.020 - 0.060 mm (0.0008 - 0.0024 inch)
Crankshaft Bearing Clearance (Journal #1-Service) 0.025 - 0.051 mm (0.0010 - 0.0020 inch)
Crankshaft Bearing Clearance (Journal #2, #3, and #4-Service) 0.025 - 0.064 mm (0.0010 - 0.0025 inch)
Crankshaft Bearing Clearance (Journal #5-Service) 0.038 - 0.063 mm (0.0015 - 0.0025 inch)
Crankshaft End Play 0.05 - 0.20 mm (0.002 - 0.008 inch)
Crankshaft Journal Diameter (Journal #1) 62.189 - 62.212 mm (2.4484 - 2.4493 inch)
Crankshaft Journal Diameter (Journal #2, #3, and #4) 62.181 - 62.207 mm (2.4481 - 2.4491 inch)
Crankshaft Journal Diameter (Journal #5) 62.185 - 62.207 mm (2.4482 - 2.4491 inch)
Crankshaft Journal Out-of-Round (Production) 0.005 mm (Maximum) (0.0002 inch (Maximum))
Crankshaft Journal Out-of-Round (Service) 0.025 mm (Maximum) (0.0010 inch (Maximum))
Crankshaft Journal Taper (Production) 0.005 mm (Maximum) (0.0002 inch (Maximum))
Crankshaft Journal Taper (Service) 0.025 mm (Maximum) (0.0010 inch (Maximum))
Crankshaft Runout at Rear Flange 0.038 mm (0.0015 inch)
Cylinder Bore
Diameter 94.894 - 94.947 mm (3.7360 - 3.7381 inch)
Out-of-Round (Production) (0.025 mm 0.0010 inch)
Out-of-Round (Service) 0.05 mm (0.002 inch)
Taper (Production-Relief Side) 0.025 mm (0.0010 inch)
Taper (Production-Thrust Side) 0.012 mm (0.0005 inch)
Taper (Service Limit) 0.025 mm (0.0010 inch)
Cylinder Head
Surface Flatness (Engine Block Deck) 0.10 mm (0.004 inch)
Surface Flatness (Exhaust Manifold Deck) 0.05 mm (0.002 inch)
Surface Flatness (Intake Manifold Deck) 0.10 mm (0.004 inch)
Exhaust Manifold
Surface Flatness (Flange to Flange) 0.25 mm (0.010 inch)
Surface Flatness (Individual Flange) 0.05 mm (0.002 inch)
Piston
Piston Bore Clearance (Production) 0.018 - 0.053 mm (0.0007 - 0.002 inch)
Piston Bore Clearance (Service) 0.018 - 0.068 mm (0.0007 - 0.0026 inch)
Piston Pin
Clearance in Piston (Production) 0.010 - 0.020 mm (0.0004 - 0.0008 inch)
Clearance in Piston (Service) 0.013 - 0.025 mm (0.0005 - 0.0010 inch)
Diameter 23.545 - 23.548 mm (0.9270 - 0.9271 inch)
Interference Fit in Connecting Rod 0.021 - 0.040 mm (0.0008 - 0.0016 inch)
Piston Rings (End Gap Measured in Cylinder Bore)
Piston Compression Ring Gap (Production-Top Groove) 0.25 - 0.51 mm (0.010 - 0.020 inch)
Piston Compression Ring Gap (Production-2nd Groove) 0.46 - 0.66 mm (0.018 - 0.026 inch)
Piston Compression Ring Gap (Service-Top Groove) 0.25 - 0.65 mm (0.010 - 0.025 inch)
Piston Compression Ring Gap (Service-2nd Groove) 0.46 - 0.90 mm (0.018 - 0.035 inch)
Piston Compression Ring Groove Clearance (Production-Top Groove) 0.030 - 0.070 mm (0.0012 - 0.0027 inch)
Piston Compression Ring Groove Clearance (Production-2nd Groove) 0.040 - 0.080 mm (0.0015 - 0.003 inch )
Piston Compression Ring Groove Clearance (Service Limit-Top Groove) 0.030 - 0.090 mm (0.0012 - 0.0035 inch )
Piston Compression Ring Groove Clearance (Service Limit-2nd Groove) 0.040 - 0.100 mm (0.0015 - 0.0040 inch )
Piston Oil Ring Gap (Production) 0.25 - 0.76 mm (0.010 - 0.030 inch)
Piston Oil Ring Gap (Service) 0.25 - 0.89 mm (0.010 - 0.035 inch)
Piston Oil Ring Groove Clearance (Production) 0.051 - 0.17 mm (0.002 - 0.006 inch)
Piston Oil Ring Groove Clearance (Service) 0.051 - 0.22 mm (0.002 - 0.009 inch)
Valve System
Valve Face Angle 45 degrees
Valve Head Edge Margin 0.79 mm (Minimum) (10.031 inch (Minimum))
Valve Lash Rotate the Valve Rocker Arm Nut Clockwise 360 degrees (1 Turn) from Zero Lash
Valve Lifter Hydraulic Roller
Valve Rocker Arm Ratio 1.5:1
Valve Seat Angle 46 degrees
Valve Seat Runout 0.05 mm (Maximum) (0.002 inch (Maximum))
Valve Seat Width (Exhaust) 1.65 - 2.49 mm (0.065 - 0.098 inch)
Valve Seat Width (Intake) 1.14 - 1.78 mm (0.045 - 0.070 inch)
Valve Spring Free Length 51.3 mm (2.02 inch)
Valve Spring Installed Height (Exhaust) 42.92 - 43.43 mm (1.67 - 1.70 inch)
Valve Spring Installed Height (Intake) 42.92 - 43.43 mm (1.67 - 1.70 inch)
Valve Spring Pressure (Closed) 338 - 374 N at 43.2 (76 - 84 lb. at 1.70)
Valve Spring Pressure (Open) 832 - 903 N at 32.3 (187 - 203 lb. at 1.27)
Valve Stem Clearance (Exhaust-Production) 0.025 - 0.069 mm (0.0010 - 0.0027 inch)
Valve Stem Clearance (Intake-Production) 0.025 - 0.069 mm (0.0010 - 0.0027 inch)
Valve Stem Clearance (Exhaust-Service) 0.025 - 0.094 mm (0.0010 - 0.0037 inch)
Valve Stem Clearance (Intake-Service) 0.025 - 0.094 mm (0.0010 - 0.0037 inch)
Valve Stem Diameter 8.661 - 8.679 mm (0.3410 - 0.3416 inch)
Valve Stem Oil Seal Installed Height (Measured from the Top of the Large Diameter Valve Guide Bevel to the Bottom of the Valve Stem Oil Seal) 1 - 2 mm (0.03937 - 0.07874 inch)