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General Specifications

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GENERAL SPECIFICATIONS

Item Specification
Displacement (CID) 6.8L (415)
No. of Cylinders 10
Bore/Stroke 90.215/105.8 mm
Fire order 1-6-5-10-2-7-3-8-4-9
Oil pressure 93.33°C (200°F) @ 2,000 rpm 276-517 kPa (40-75 psi)
Cylinder Head/Valve Train 
Combustion chamber volume 52.6 - 51.6 cc
Valve seat width - intake 2.1-1.9 mm
Valve seat width - exhaust 2.1-1.9 mm
Valve seat angle 45.00-44.50 degrees
Valve seat runout (T.I.R.) 0.025 mm
Valve arrangement (front to rear) 
Valve stem guide clearance Intake 0.069-0.020 mm
Exhaust 0.095-0.045 mm
Valve head diameter Intake 44.63-44.37 mm
Exhaust 34.12-33.88 mm
Valve face runout (limit) 0.05 mm
Valve face angle 45.75-45.25 degrees
Valve stem diameter Intake 6.995-6.975 mm
Exhaust 6.970-6.949 mm
Valve spring compression pressure Intake (N @ Spec. Length) 667.3 N @ 28.02 mm
Exhaust (N @ Spec. Length) 667.3 N @ 28.02 mm
Valve spring free length Intake 50.2 mm
Exhaust 50.2 mm
Valve spring installed pressure (N @ Spec. Length) Intake 289.1 N @ 40.01 mm
Exhaust 289.1 N @ 40.01 mm
Valve springs installed pressure (N @ Spec. Length - Service Limit) Intake 274.6 mm @ 40.01 mm
Exhaust 274.6 mm @ 40.01 mm
Valve springs - out of square limit Intake 2.5 degrees
Exhaust 2.5 degrees
Valve guide inside diameter 7.044-7.015 mm
Camshaft 
Lobe lift Intake 6.58077 mm
Exhaust 6.58551 mm
Lobe lift - allowable lift loss 0
Valve lift @ zero lash Intake 12.00 mm
Exhaust 12.00 mm
Camshaft end play 0.25-0.188 mm
End play service limit 0.025-0.188 mm
Journal-to-bearing clearance 0.076-0.025 mm
Journal diameters 26.962-26.936 mm
Journal inside diameter (cap assembled) 27.012-26.987 mm
Camshaft runout: full indicator measurement on all journals when supported on front and rear journals 0.09 mm (5 places)
Cylinder Bore Diameter Grade 1 90.200-90.210 mm
Grade 2 90.210-90.220 mm
Grade 3 90.220-90.230 mm
Piston 
Piston diameter (Grade 2) at right angle-to-pin bore 90.180 ± 0.005 mm
Piston-to-bore clearance (-0.005) to +0.025 mm
Pin bore diameter (piston) 22.008-22.014 mm
Pin diameter 22.0010-22.0030 mm
Clearance (neg. or pos.) 0.0139-0.005 mm
Pin bore diameter (rod) 22.012-22.024 mm
Clearance 0.009-0.023 mm
Ring groove width Top 1.503-1.505 mm
Intermediate 1.502-1.504 mm
Oil control 3.030-3.050 mm
Piston ring gap Top 0.15-0.30 mm
Intermediate 0.25-0.50 mm
Oil control 0.15-0.65 mm
Crankshaft 
Main bearing journal diameter Maximum out-of-round 67.482-67.504 0.0075 mm (in) between cross sections
Maximum taper (Straightness) 0.004 mm
Runout: FIM of center journals when located on front and rear journal 0.05 mm 3 Places
Clearance - crankshaft journal-to-main bearing clearance 0.048-0.024 mm
Connecting rod journal diameter 53.003-52.983 mm
Maximum out-of-round Maximum taper 0.0075 mm between cross sections 0.004 mm
Crankshaft end play 0.075-0.377
Connecting Rod 
Big end journal inside diameter with assembled liners 53.049-53.027 mm
Rod bearing-to-journal clearance 0.064-0.026 mm
Pin bore diameter (rod) 22.024-22.012 mm
Balance Shaft System 
Balance shaft journal diameter 26.962-26.936 mm
Clearance - balance shaft journal-to-cylinder head 0.076 - 0.025 mm
Cylinder head balance shaft journal diameter 27.012 - 26.987 mm
Gear backlash 0.0076 - 0.1295 mm
Balance shaft end play 0.04 - 0.18 mm
Rod length (centerline bore-to-bore) 169.1 mm
Alignment Bore-to-bore max. twist ± 0.05 mm
Bore-to-bore max. bend ± 0.038 mm
Side play (as assembled to crank) Standard play 0.410 ± 0.26 mm
Max. play 0.670 mm
Sealant and Lubricants 
Silicone Gasket and Sealant F7AZ-19554-EA WSE-M4G323-A4
Motorcraft Premium Gold Engine Coolant VC-7-A WSS-M97B51-A1
SAE 5W-20 Synthetic Blend Motor Oil XO-5W20-QSP WSS-M2C153-H
Metal Surface Prep ZC-31 -
Silicone Gasket Remover ZC-30 -
Instant Adhesive E8AZ-19554-A WSK-M2G402-A4