Engine Mechanical Specifications

Displacement 6.0L (364 CID)
RPO LQ4
VIN U
Bore 101.618-101.636 mm (4.0007-4.0014 in)
Stroke 92.0 mm (3.622 in)
Compression Ratio 9.4:1
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 101.618-101.636 mm (4.0007-4.0017 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 mm (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)
Connecting Rod
Connecting Rod Bearing Clearance
Production 0.023-0.065 mm (0.0009-0.0025 in)
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 0.006 mm (0.0002 in)
Service 0.006 mm (0.0002 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)
Service 53.308 mm (2.0987 in)
Connecting Rod Journal Out-of-Round
Production 0.005 mm (0.0002 in)
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)
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)
Service 0.02-0.065 mm (0.0008-0.0025 in)
Crankshaft Main Journal Diameter
Production 64.992-65.008 mm (2.558-2.559 in)
Service 64.992 mm (2.558 in)
Crankshaft Main Journal Out-of-Round
Production 0.003 mm (0.000118 in)
Service 0.008 mm (0.0003 in)
Crankshaft Main Journal Taper
Production 0.01 mm (0.0004 in)
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)
Service 26.22 mm (1.0315 in)
Crankshaft Thrust Surface Runout 0.025 mm (0.001 in)
Piston Ring
Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore
Production 0.31-0.52 mm (0.012-0.02 in)
Service 0.31-0.59 mm (0.0122-0.023 in)
Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore
Production 0.51-0.77 mm (0.02-0.03 in)
Service 0.51-0.84 mm (0.02-0.033 in)
Piston Ring End Gap - Oil Control Ring - Measured in Cylinder Bore Production 0.31-0.87 mm (0.0122-0.034 in)
Service 0.31-0.94 mm (0.0122-0.037 in)
Piston Ring to Groove Clearance - First Compression Ring
Production 0.04-0.08 mm (0.00157-0.0031 in)
Service 0.04-0.08 mm (0.00157-0.0031 in)
Piston Ring to Groove Clearance - Second Compression Ring
Production 0.039-0.079 mm (0.0015-0.0031 in)
Service 0.039-0.079 mm (0.0015-0.0031 in)
Piston Ring to Groove Clearance - Oil Control Ring
Production 0.015-0.199 mm (0.0006-0.0078 in)
Service 0.015-0.199 mm (0.0006-0.0078 in)
Pistons and Pins
Pin - Piston Pin Clearance to Piston Pin Bore
Production 0.002-0.01 mm (0.00008-0.0004 in)
Service 0.002-0.015 mm (0.00008-0.0006 in)
Pin - Piston Pin Diameter 23.952-23.955 mm (0.943-0.943 in)
Pin - Piston Pin Fit in Connecting Rod Bore
Production 0.007-0.02 mm (0.00027-0.00078 in)
Service 0.007-0.022 mm (0.00027-0.00086 in)
Piston - Piston Diameter - Measured Over Skirt Coating 101.606-101.640 mm (4.0002-4.0016 in)
Piston - Piston to Bore Clearance
Production -0.022 to +0.03 mm - interference (-0.0009 to +0.0012 in - interference)
Service Limit with Skirt Coating Worn Off 0.07 mm (0.0028 in)