1997 F-250/350/Super Duty

Engine Specifications
Bore and Stroke	Firing Order	Oil Pressure, Normal Operating Temperature @ 3300 rpm kPa (psi)	Engine Type and Number of Cylinders	Compression Ratio
4.11 In. x 4.18 In.	1-2-7-3-4-5-6-8	276-482 kPa (40-70)	O.H.V. V-8	17.5 to 1

DRIVE BELT TENSION
Tensioning Method	Belt Tension
Automatic	378 N (85 Lb) Min.

Cylinder Head
Valve Guide Bore Diameter	Valve Seat Width^a	Valve Seat Runout TIR Maximum	Valve Arrangement Front to Rear	Gasket Surface Flatness^b	Deck-to-Deck Dimension
Intake	Exhaust	Intake	Exhaust
0.3141 In.- 0.3151 In.^c	0.3141 In.- 0.3151 In.^c	1.651- 2.413 mm (0.065 In.- 0.095 In.)	1.651- 2.413 mm (0.065 In.- 0.095 In.)	0.05 mm (0.002 In.)	LT I-E-I-E-I-E-I-E RT E-I-E-I-E-I-E-I	0.025 mm (0.001 In.) in 2 In. 0.10 mm (0.004 In.) Overall	129.41-129.67 mm (5.095-5.105 In.)

^a Valve seat angle — intake 30 degrees and exhaust 37.5 degrees.
^b Gasket surface finish — 63-125 RMS
^c Maximum 0.3180 in.

Rocker Arm Shaft, Push Rods And Valve Tappets
Type	Push Rod Runout TIR Maximum	Valve Tappet or Lifter			Collapsed Tappet Gap (Clearance)^c
Type	Push Rod Runout TIR Maximum	Standard Diameter	Clearance to Bore^a	Hydraulic Lifter Leak-Down Rate^b	Collapsed Tappet Gap (Clearance)^c
Hydraulic Roller Follower	0.5 mm Max. (0.02 In.)	23.391- 23.411 mm (0.9209 In.- 0.9217 In.)	0.027- 0.086 mm (0.0011 In.- 0.0034 In.)	18-90 Sec. for 3.17mm (0.125 in.) Travel	4.69 mm (0.185 In.) Max.

^c Measured at valve tip to rocker arm.
^a Service limit — 0.005.
^b Time required for plunger to move 3.17 mm (0.125 in.) under load of 50 lb with test fluid at room temperature.

Valve Springs
Valve Spring Compression Pressure Lbs @ Specified Height		Valve Spring Free Length (Approximate)		Valve Spring Assembled Height		Valve Spring Out of Square Maximum
Intake	Exhaust	Intake	Exhaust	Intake	Exhaust	Valve Spring Out of Square Maximum
32-35 kg @ 46.55 mm (71-79 lbs. @ 1.833 in) 102-112 kg @ 34.35 mm (225-249 lbs. @ 1.352 in)	32-35 kg @ 46.55 mm (71-79 lbs. @ 1.833 in) 102-112 kg @ 34.35 mm (225-249 lbs. @ 1.352 in)	52.70 mm ± 3.8 mm (2.075 In. ± 0.150 In.)	52.70 mm ± 3.8 mm (2.075 In. ± 0.150 In.)	44.881 mm (1.767 In.)	46.558 mm (1.833 In.)	1.981 mm (0.078 In.)

Valves
Valve Stem-to-Guide Clearance (max.)^a		Valve Face Angle		Valve Face Runout TIR Maximum
Intake	Exhaust	Intake	Exhaust	Valve Face Runout TIR Maximum
0.140 mm (0.0055 In.)	0.140 mm (0.0055 In.)	30 Degrees	37.5 Degrees	0.050 mm (0.002 In.)

^a Service clearance — 0.0055.

VALVES (Continued)
Minimum Valve Face Margin — Intake Valves	Minimum Valve Face Margin — Exhaust Valves	Valve Stem Diameter	Valve Head Recession Relative to Deck Surface
Minimum Valve Face Margin — Intake Valves	Minimum Valve Face Margin — Exhaust Valves	Valve Stem Diameter	Intake	Exhaust
1.67 mm (0.066 In.)	1.37 mm (0.054 In.)	7.921-7.939 mm (0.31185-0.31255 In.)	1.17-1.47 mm (0.046-0.058 In.)	1.32-1.63 mm (0.052-0.064 In.)

Camshaft
End Play	Camshaft Journal to Bearing Clearance	Intake — Lobe Lift	Exhaust — Lobe Lift	Camshaft Thrust Plate Thickness
End Play	Camshaft Journal to Bearing Clearance	Intake — Lobe Lift	Exhaust — Lobe Lift	Thrust Area	Outside of Thrust Area
0.051-0.203 mm (0.002-0.008 In.)	0.051-0.165 mm (0.002-0.006 In.)	6.44 mm (0.2535 In.) Max.	6.43 mm (0.2531 In.) Max.	3.910-3.961 mm (0.154-0.156 In.)	3.784-3.987 mm (0.149-0.157 In.)

Camshaft Drive
Camshaft Bearing Inside Diameter^a					Camshaft Front Bearing Location^b	Gear Backlash
No. 1	No. 2	No. 3	No. 4	No. 5	Camshaft Front Bearing Location^b	Gear Backlash
53.39- 53.48 mm (2.102- 2.105 In.)	53.39- 53.48 mm (2.102- 2.105 In.)	53.39- 53.48 mm (2.102- 2.105 In.)	53.39- 53.48 mm (2.102- 2.105 In.)	53.39- 53.48 mm (2.102- 2.105 In.)	0.020-0.050 Inch	0.140-0.256 mm (0.0055-0.010 In.)

^a All camshaft journals are 53.31-53.34 mm (2.099-2.100 in.).
^b Distance in inches that front edge of the bearing is installed below the front face of the cylinder block.

Cylinder Block
Bore size	Cylinder Bore Diameter^a	Head Gasket Surface Flatness
104.384-104.402 mm (4.1096-4.1103 In.)	Standard	0.001 In. in any 2 In. 0.004 In. Overall
104.502 mm (4.11425 In.)	0.010 Oversize	0.001 In. in any 2 In. 0.004 In. Overall
104.756 mm (4.12425 In.)	0.020 Oversize	0.001 In. in any 2 In. 0.004 In. Overall
105.010 mm (4.13425 In.)	0.030 Oversize	0.001 In. in any 2 In. 0.004 In. Overall

^a Maximum out-of-round — 0.051 mm (0.0002 in.); maximum taper — 0.076 mm (0.003 in.).

Crankshaft And Flywheel
Crankshaft Diameter	Main Bearing Journal Diameter	Main Bearing Journal Out-of-Round Maximum	Main Bearing Thrust Face Runout TIR Maximum	Main Bearing Journal Taper Maximum per Inch	Thrust Bearing Journal Width	Main and Rod Bearing Journal Finish RMS Maximum	Main Bearing Thrust Face Finish RMS Maximum
Standard	79.139-79.340 mm (3.1228-3.1236 In.)	0.0056 mm (0.00022 In.)	0.025 mm (0.001 In.)	0.0038 mm (0.00015 In.)	31.509- 31.585 mm (1.2405- 1.2435 In.)	10	20
0.010 Undersize	79.065-79.085 mm (3.1128-3.1136 In.)	0.0056 mm (0.00022 In.)	0.025 mm (0.001 In.)	0.0038 mm (0.00015 In.)	31.509- 31.585 mm (1.2405- 1.2435 In.)	10	20
0.020 Undersize	78.811-78.831 mm (3.1028-3.1036 In.)	0.0056 mm (0.00022 In.)	0.025 mm (0.001 In.)	0.0038 mm (0.00015 In.)	31.509- 31.585 mm (1.2405- 1.2435 In.)	10	20
0.030 Undersize	78.557-78.577 mm (3.0928-3.0936 In.)	0.0056 mm (0.00022 In.)	0.025 mm (0.001 In.)	0.0038 mm (0.00015 In.)	31.509- 31.585 mm (1.2405- 1.2435 In.)	10	20

CRANKSHAFT AND FLYWHEEL (Continued)
Crankshaft Diameter	Connecting Rod Journal Diameter^a	Connecting Rod Journal Taper per Inch Maximum	Crankshaft End Play^b	Flywheel and Ring Gear Runout	Flywheel and Ring Gear Concentricity
Standard	63.45-63.47 mm (2.4980-2.4990 In.)	0.0066 mm (.00026 In.)	0.063-0.216 mm (0.0025-0.0085 In.)	0.203 mm (0.008 In.)	0.203 mm (0.008 In.)
0.010 Undersize	63.20-63.22 mm (2.488-2.489 In.)	0.0066 mm (.00026 In.)	0.063-0.216 mm (0.0025-0.0085 In.)	0.203 mm (0.008 In.)	0.203 mm (0.008 In.)
0.020 Undersize	62.94-62.96 mm (2.478-2.479 In.)	0.0066 mm (.00026 In.)	0.063-0.216 mm (0.0025-0.0085 In.)	0.203 mm (0.008 In.)	0.203 mm (0.008 In.)
0.030 Undersize	62.69-62.71 mm (2.468-2.469 In.)	0.0066 mm (.00026 In.)	0.063-0.216 mm (0.0025-0.0085 In.)	0.203 mm (0.008 In.)	0.203 mm (0.008 In.)

^a Maximum out-of-round — 0.0056 mm (0.00022 in.).
^b Service limit — 0.51 mm (0.020 in.).

Crankshaft Bearings
Connecting Rod Bearing to Crankshaft Clearance	Main Bearing to Crankshaft Clearance
0.038-0.114 mm (0.0015-0.0045 In.)	0.046-0.0914 mm (0.0018-0.0036 In.)

Connecting Rod
Rod Bearing I.D.^a^b	Rod Length Center to Center	Connecting Rod Alignment Maximum Total Difference		Rod to Crankshaft Assembled Side Clearance
Rod Bearing I.D.^a^b	Rod Length Center to Center	Twist/Inch	Bend/Inch	Rod to Crankshaft Assembled Side Clearance
63.513-63.564 mm (2.5005- 2.5025 In.)	181.10 mm (7.130 In.)	0.05 mm (0.002 In.)	0.025 mm (0.001 In.)	0.30-0.61 mm (0.012-0.024 In.)

^a Connecting rod bearing bore maximum out-of-round — 0.0005, and maximum bore taper — 0.0005.
^b With bearing caps tightened in place.

CONNECTING ROD (Continued)
Piston Pin Bushing I.D.	Crankpin Bearing Bore Diameter	Bearing Bore
Piston Pin Bushing I.D.	Crankpin Bearing Bore Diameter	Max. Out-of-Round	Max. Taper per Inch
33.23-33.25 mm (1.308-1.309 In.)	68.339-68.364 mm (2.6905 In.-2.6915 In.)	0.013 mm (0.0005 In.)	0.013 mm (0.0005 In.)

Piston
Available Pistons	Skirt Diameter^a^b	Piston Pin Bore Diameter	Piston Height Above Crankcase
Standard	104.26065 mm (4.10475 in)	33.235-33.248 mm (1.3085-1.3088in)	0.254-0.787 mm (0.010-0.031 in)
.010 in Oversize	104.51465 mm (4.11475 in)	33.235-33.248 mm (1.3085-1.3088 in)	0.254-0.787 mm (0.010-0.031 in)
.020 in Oversize	104.76865 mm (4.12475 in)	33.235-33.248 mm (1.3085-1.3088in)	0.254-0.787 mm (0.010-0.031 in)
.030 in Oversize	105.02265 mm (4.13475 in)	33.235-33.248 mm (1.3085-1.3088in)	0.254-0.787 mm (0.010-0.031 in)

^a Service piston specification are all ± 0.00635 mm (0.00025 in)
^b Measured at 90 degrees to the pin, at 42.77 mm (1.684 in) below the oil ring groove at room temperature.

Piston Pin
Length	Diameter	To Piston Pin Bore Clearance	To Connecting Rod Bushing Clearance
75.9-76.2 mm (2.99-3.00 In.)	33.220-33.226 mm (1.3079-1.3081 In.)	0.007-0.018 mm (0.0003-0.0007 In.)	0.010-0.023 mm (0.0004-0.0009 In.)

Piston Rings
Ring Side Clearance (Second Ring Only)	Ring Gap			Oversize
	Compression		Oil
	Top	Second	Oil
—	0.35-0.61 mm (0.014- 0.024 In.)	1.57-1.83 mm (0.062- 0.072 In.)	0.30- 0.61 mm (0.012- 0.024 In.)	0.010 In. 4.120 In.
0.05-0.10 mm (0.002- 0.004 In.)	0.35-0.61 mm (0.014- 0.024 In.)	1.57-1.83 mm (0.062- 0.072 In.)	0.30- 0.61 mm (0.012- 0.024 In.)	0.020 In. 4.130 In.
0.05-0.10 mm (0.002- 0.004 In.)	0.35-0.61 mm (0.014- 0.024 In.)	1.57-1.83 mm (0.062- 0.072 In.)	0.30- 0.61 mm (0.012- 0.024 In.)	0.030 In. 4.140 In.

Exhaust Manifold

Maximum Allowable Warpage	0.13 mm (0.005 In.) Between Ports 0.25 mm (0.010 In.) Total
Maximum Allowable Removal of Material	0.25 mm (0.010 In.)

Oil Pump, Oil Cooler And Oil Capacity
Oil Pump Pressures Engine at Normal Operating Temperature		Engine Oil Capacity^a		Oil Pump Drive Gear Radial Clearance	Oil Pump Drive Gear End Clearance
Curb Idle	3300 rpm	Liters	U.S. Qt	Oil Pump Drive Gear Radial Clearance	Oil Pump Drive Gear End Clearance
69 kPa (10 psi) Min.	276-482 kPa (40-70 psi) Max.	12.3	13	0.31-0.81 mm (0.012-0.032 In.)	0.025-0.076 mm (0.001-0.003 In.)

^a Add 2 U.S. quarts (1.9 liters) when replacing oil filter.

Torque Wrench Information

NOTE: Unless otherwise specified, use standard torque chart. Torque values are with threads and washer faces coated with engine oil. Torque values are listed without tolerance. Variations to torque will occur due to torque wrench calibration. Variation should be within 10 percent of nominal values.

Standard Torque — English
Description	Nm	Lb-Ft
1/4-20 UNC	9.5	7
5/16-18 UNC	19	14
3/8-16 UNC	32	24
7/16-14 UNC	51	38
1/2-13 UNC	81	60

Standard Torque — Metric
Bolt or Nut Diameter	Class	Nm	Lb-Ft	Lb-In
M4	9.8	2.6-3.8	—	23-34
M5	9.8	5.0-8.0	—	44-71
M6	9.8	9-13	—	80-115
M8	9.8	21-32	16-24	—
M10	9.8	40-64	30-46	—
M12	9.8	60-95	44-70	—
M14	9.8	100-150	74-110	—
M16	9.8	155-230	114-170	—
M6	10.9	11-17	8-12	—
M8	10.9	28-42	21-31	—
M10	10.9	54-82	40-60	—
M12	10.9	80-120	59-88	—
M14	10.9	130-190	96-140	—
M16	10.9	200-295	147-217	—
M20	10.9	395-570	291-420	—
M24	10.9	685-985	505-726	—

Pipe Threads
1/8x27	1/4x18	3/8x18	1/2x14
7-11 Nm (5-8 Lb-Ft)	17-24 Nm (12-18 Lb-Ft)	30-44 Nm (22-33 Lb-Ft)	34-47 Nm (25-35 Lb-Ft)

Torque Specifications
Description	Nm	Lb-Ft	Lb-In
A/C Compressor Mounting Bracket to Engine	40-55	30-40	—
A/C Compressor Bolt	23-31	17-22	—
A/C Manifold Lines	18-23	13-17	—
Crankshaft Vibration Damper Bolt/Crankshaft Pulley Bolt	287	212	—
Cylinder Head Bolt Torque
Step 1	88	65	—
Step 2	115	85	—
Step 3	142	105	—
Connecting Rod Nuts
Step 1	71	52	—
Step 2	108	80	—
Engine Front Cover Bolts	20	15	—
Engine Mount Nuts	96-127	71-94	—
Engine Rear Cover Bolts	20	15	—
Exhaust Manifold (To Cylinder Head) (M10)^a	61	45	—
Fan Clutch to Water Pump	113-153	83-113	—
Fan Shroud Screws	5-8	—	44-71
Flywheel Mounting Bolt (Automatic Transmission)	121	89	—
Flywheel Mounting Bolt^a (Manual Transmission)	121	89	—
Flywheel Housing Cover Mounting Screws	17-23	13-17	—
Fuel Filter to Cylinder Block	33-52	24-38	—
Fuel Rail End Plug	11	8	—
Fuel Supply Tube Bolt (Banjo Fitting)	55	40	—
Generator Bolt	40-55	30-40	—
Generator Bracket to Cylinder Head	40-55	30-40	—
Glow Plug	19	14	—
Heater Hose Fitting to Water Pump	17-24	13-18	—
High Pressure Oil Pump Gear Bolt	129	95	—
Injection Control Pressure Sensor (ICP)^a	29	21	—
Intake Manifold Cover Bolts (M8)	24	18	—
Main Bearing Cap Bolts^b	129	95	—
Oil Cooler to Cylinder Block	^c	—	—
Oil Cooler Plug	20	15	—
Oil Deflector Mounting Bolt	12	9	—
Oil Pump Housing Retaining Bolts	27	20	—
Oil Reservoir Mounting Bolts and Nuts	27	20	—
Oil Filter to Header Adapter	1 1/4-2 Turns After Initial Seal Contact
Oil Level Gauge Tube Adapter Nut	33	24	—
Oil Pan Drain Plug	37	27	—
Oil Pump Screen Cover and Tube Flange Screws	24	18	—
Oil Rail Drain Plug	6	—	53
Oil Rail End Plug^a	81	60	—
Piston Cooling Tube Bolt	11	8	—
Power Steering Pump Lines	30-40	22-30	—
Power Steering Pump Mounting Bracket to Engine	40-55	30-40	—
Power Steering Pump to Mounting Bracket	40-55	30-40	—
Radiator Retaining Bolts	24-34	18-25	—
Rocker Arm Post Attaching Bolts	27	20	—
Secondary Flywheel to Primary Flywheel	64	47	—
Transmission to Engine Bolts	53-72	39-53	—
Turbocharger Exhaust Inlet Pipe-to-Exhaust Manifold Bolts	28	21	—
Turbocharger Exhaust Inlet Pipe-to-Turbocharger Exhaust Inlet Adapter Bolts	28	21	—
Vacuum Pump to Bracket	23-31	17-22	—
Valve Cover Bolt	11	8	—
Water Pump Outlet Mounting Bolt	20	15	—
Water Pump Mounting Bolts	20	15	—
Water Pump Pulley	16-24	12-18	—

^a Apply Threadlock® and Sealer EOAZ-19554-AA or equivalent meeting Ford specification WSK-M2G351-A6 (Type II) to all threads prior to assembly.
^b Tighten four main bearing cap bolts to 102 Nm (75 lb-ft) before final torque is applied.
^c See Standard Torque charts.

Lubricant/Adhesive/Cleaner Specifications
Description	Part Number	Ford Specification
Multi-Purpose Grease	DOAZ-19584-AA	ESB-M1C93-A
Rust Penetrant and Inhibitor	F2AZ-19A501-A	ESR-M99C56-A
Silicone Rubber	F4AZ-19562-B	WSE-M4G323-A1 and ESE-M4G195-A
Perfect Seal Sealing Compound	F2AZ-19554-AA	ESR-M18P2-A and ESE-M4G115-A
Stud and Bearing Mount	EOAZ-19554-BA	WSK-M2G349-A1

SPECIFICATIONS

Torque Wrench Information