Contents Wiring diagrams Section: Mechanical All sections

Engine - 6.8L- E350 & E450: Specifications Ford RV Cutaway E350 Super Duty

GENERAL SPECIFICATIONS - SEALANT & LUBRICANTS

ItemSpecification
Sealant and Lubricants
Silicone Gasket and Sealant TA-30 or equivalentWSE-M4G323-A4
Motorcraft Premium Gold Engine Coolant VC-7-A (in California and Oregon VC-7-B, in Canada VC-7-C) or equivalent (yellow in color)WSS-M97B51-A1
SAE 5W-20 Premium Synthetic Blend Motor Oil XO-5W20-QSP or equivalentWSS-M2C930-A
Metal Surface Prep ZC-31
Silicone Gasket Remover ZC-30
Instant Gel Adhesive TA-19 or equivalentWSK-M2G402-A4

GENERAL SPECIFICATIONS - SEALANT & LUBRICANTS

GENERAL SPECIFICATIONS - 6.8L ENGINE

ItemSpecification
Displacement (CID)6.8L (415)
No. of Cylinders10
Bore/Stroke90.215/105.8 mm
Fire order1 - 6-5 - 10-2 - 7-3 - 8-4 - 9
Oil pressure 93.33°C (200°F) @ 2,000 rpm276 - 517 kPa (40 - 75 psi)
Oil capacity6.5L (6.9 qts) with filter
Compression ratio9.0:1
Cylinder Head/Valve Train
Combustion chamber volume52.6 - 51.6 cc
Valve seat width - intake1.5-1.3 mm
Valve seat width - exhaust1.5-1.3 mm
Valve seat angle45.00-44.50 degrees
Valve seat runout (T.I.R.)0.04 mm
Valve arrangement (front to rear) - LHE-I-E-I-E-I-E-I-E-I
Valve arrangement (front to rear) - RHI-E-I-E-I-E-I-E-I-E
Valve stem guide clearance
Intake0.069-0.020 mm
Exhaust0.094-0.045 mm
Valve head diameter
Intake44.63-44.37 mm
Exhaust36.14-35.44 mm
Valve face runout (limit)0.05 mm
Valve face angle45.75-45.25 degrees
Valve stem diameter
Intake6.995-6.975 mm
Exhaust6.970-6.949 mm
Valve spring compression pressure
Intake (N @ Spec. Length)760 N @ 28.8 mm
Exhaust (N @ Spec. Length)760 N @ 28.8 mm
Valve spring free length
Intake53.37 mm
Exhaust53.37 mm
Valve spring installed pressure (N @ Spec. Length)
Intake302 N @ 42.56 mm
Exhaust302 N @ 42.56 mm
Valve springs installed pressure (N @ Spec. Length - Service Limit)
Intake283 N @ 42.56 mm
Exhaust283 N @ 42.56 mm
Valve springs - out of square limit
Intake2.5 degrees
Exhaust2.5 degrees
Valve guide inside diameter7.044-7.015 mm
Camshaft
Lobe lift
Intake7.10983 mm
Exhaust7.49724 mm
Lobe lift - allowable lift loss0
Valve lift @ zero lash
Intake12.00 mm
Exhaust12.00 mm
Camshaft end play0.190-0.027 mm
End play service limit0.190-0.027 mm
Journal-to-bearing clearance0.076-0.025 mm
Journal diameters26.962-26.936 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 journals0.09 mm (5 places)
Cylinder Bore Diameter
Grade 11 90.200-90.210 mm
Grade 290.210-90.220 mm
Grade 390.220-90.230 mm
Piston
Piston diameter (Grade 2) at right angle-to-pin bore90.180 +/- 0.005 mm
Piston-to-bore clearance(-0.005) to +0.025 mm
Pin bore diameter (piston)22.008-22.014 mm
Pin diameter22.0010-22.0030 mm
Clearance (neg. or pos.)0.0139-0.005 mm
Pin bore diameter (rod)22.012-22.024 mm
Clearance0.009-0.023 mm
Ring groove width Top1.503-1.505 mm
Intermediate1.502-1.504 mm
Oil control3.030-3.050 mm
Piston ring gap
Top0.15-0.30 mm
Intermediate0.25-0.50 mm
Oil control0.15-0.65 mm
Crankshaft
Main bearing journal diameter67.481-67.505 mm
Maximum out-of-round0.0075 mm between cross sections
Maximum taper (Straightness)0.004 mm
Runout: FIM of center journals when located on front and rear journal0.05 mm 3 Places
Clearance - crankshaft journal-to-main bearing clearance0.048-0.024 mm
Connecting rod journal diameter53.003-52.983 mm
Maximum out-of-round0.0075 mm between cross sections
Maximum taper0.004 mm
Crankshaft end play0.075-0.377 mm
Connecting Rod
Big end journal inside diameter with assembled liners53.049-53.027 mm
Rod bearing-to-journal clearance0.064-0.026 mm
Pin bore diameter (rod)22.024-22.012 mm
Balance Shaft System
Balance shaft journal diameter26.962 - 26.936 mm
Clearance - balance shaft journal-to-cylinder head0.076 - 0.025 mm
Cylinder head balance shaft journal diameter27.012 - 26.987 mm
Gear backlash0.0076 - 0.1295 mm
Balance shaft end play0.04-0.23 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 play0.410 +/- 0.26 mm
Maximum play0.670 mm

GENERAL SPECIFICATIONS - 6.8L ENGINE

TORQUE SPECIFICATIONS

DescriptionNmLb-ftLb-in
Balancer shaft bearing cap bolts and studs1089
Valve cover bolts1089
Camshaft bearing cap bolts1089
Camshaft sprocket bolts (1)
Cylinder head temperature (CHT) sensor2619
Camshaft position (CMP) sensor bolt1089
Crankshaft position (CKP) sensor bolt1089
Connecting rod bolts (1)
Crankshaft damper pulley bolt (1)
Crankshaft main bearing bolts (cross mounted) (1)
Crankshaft main bearing bolts (vertical) (1)
Cylinder heads bolts (1)
Exhaust manifold nuts2518
Exhaust manifold studs129
Accessory drive belt idler pulley bolt2518
Flexplate bolts8059
Engine front cover bolts (1 - 5)2518
Engine front cover bolts (6 - 15)4835
Fuel injection supply manifold bracket bolts1089
Heater return tube studs4030
Ignition coil653
Knock sensor (KS) bolt2015
Intake manifold-to-cylinder head bolts (1)
Oil bypass filter1612
Oil filter adapter bolt2518
Oil filter adapter nut4735
Wiring harness bracket nut2518
Oil filter adapter stud129
Oil level indicator bolt1089
Oil pan bolts (1)
Oil pan drain plug2317
Oil pressure sender1410
Oil pump bolts1089
Oil pump screen cover and tube bolts1089
Oil pump screen and pickup tube spacer2518
Power steering pump bolts2518
Crankshaft rear seal retainer plate bolts1089
Spark plugs1813
Coolant outlet bolts2518
Throttle body spacer to intake manifold bolts (1)
Throttle body-to-throttle body spacer bolts (1)
Timing chain guide bolts1089
Timing chain hydraulic tensioner bolts2518
Coolant pump bolts2518
Coolant pump pulley bolts2518
Transmission cooler tube nut2518
Oil cooler threaded insert5843
Engine mount nuts9066
Engine mount bolts8059
Dual converter Y-pipe nuts4030
Torque converter nuts4030
Transmission-to-engine bolts4735
Fan shroud bolts653
Oil level indicator-to-front cover nut2518
Engine cooling fan clutch13398
Transmission cooler tubes bracket nut129
A/C compressor mounting bolts2518
Generator mounting bolts2518
Generator mounting bracket bolts1089
Accessory drive belt tensioner bolts2518
Flywheel inspection plate bolts3425
Radiator bracket mounting bolts2015
A/C condenser tube (small)1813
A/C condenser tube (large)3929
A/C suction tube nut4735
A/C condenser bracket bolts129
Starter mounting bolts/stud bolt2518
Starter ground cable nut2015
Starter positive cable nut129
Starter control wire nut653
Oil fill tube bolt1089
Cylinder block drain plug2418
Radio frequency interference capacitor2518
Hood latch bolts129
Power steering reservoir bolts2015
Upper and lower radiator support bracket bolts2015
Fuel charging wiring harness nuts/bolts1089
Clean air tube clamps435
Air cleaner assembly bolts762
(1) Refer to the appropriate procedure in this article.
(1)Refer to the appropriate procedure in this article.

TORQUE SPECIFICATIONS