Contents Section: Mechanical All sections

6.9l v8 Diesel - VIN [1] Ford Cab & Chassis Ranger

Mechanical 15 illustrations ~4061 words

ENGINE IDENTIFICATION

Note. For engine repair procedures not covered in this article, see ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION article in the GENERAL INFORMATION section.

The eighth character of the Vehicle Identification Number (VIN) identifies the engine. The VIN is stamped on a metal tab attached to the instrument panel upper left side, near the windshield. The VIN is also on the Safety Compliance Certification Label on the left door lock pillar.

ApplicationVIN Code
6.9L V8 Diesel1

ENGINE IDENTIFICATION CODES

ENGINE REMOVAL

See ENGINE REMOVAL - V8 article.

Removal

  1. Disconnect battery ground cables. Remove air cleaner. Install Intake Manifold Cover (T83T-9424-A). On E250/E350 models, disconnect fuel inlet and return lines from fuel filter. Remove filter and bracket as an assembly.
  2. Remove engine oil filler neck. Remove bolts attaching injection pump to drive gear. Disconnect electrical connectors to injection pump. Disconnect accelerator cable and speed control cable from throttle lever, if equipped.
  3. Remove accelerator cable bracket, with cables attached, from intake manifold and position aside. Cap all fuel lines and fittings. Remove fuel filter-to-injection pump fuel line and cap fittings.
  4. Remove and cap injection pump inlet elbow and fitting adapter. Remove fuel return line on injection pump, rotate out of way and cap all fittings. Remove fuel injection lines from nozzles and cap lines and nozzles.
  5. Using Injection Pump Mounting Wrench (T83T-9000-B), remove 3 nuts attaching injection pump to injection pump adapter. Remove injection pump with nozzle lines attached.
  6. Remove fuel return hoses from No. 7 and 8 nozzles and fuel tank. Remove engine wiring harness from engine and engine harness ground cable from back of left cylinder head. Remove intake manifold bolts and manifold from cylinder head.

Installation

  1. Install and tighten intake manifold. Install engine wiring harness on engine. Connect and tighten engine wiring harness ground wire to rear of left cylinder head.
  2. Install new "O" ring on drive gear end of injection pump. Move injection pump into position. Position alignment dowel on injection pump into alignment hole on drive gear.
  3. Install and tighten bolts attaching injection pump to drive gear. Install nuts attaching injection pump to adapter. Align scribe lines on injection pump flange and injection pump adapter and tighten nuts.
  4. Remove caps from nozzles and fuel lines. Using Fuel Line Nut Wrench (T83T-9396-A), install and tighten fuel line nuts on nozzles. Connect fuel return line to injection pump and tighten.
  5. Using solvent, clean old sealant from injection pump elbow threads and dry thoroughly. Apply a light coating of pipe sealant on elbow threads.
  6. Install elbow in injection pump adapter and tighten to 72 INCH lbs. (8 N.m). If necessary, tighten more to align elbow with injection pump fuel inlet line, but do not exceed 360° rotation or 120 INCH lbs. (14 N.m).
  7. To complete installation, reverse removal procedure. Apply a 1/8" bead of RTV sealant to injection pump adapter housing. Start engine and check for leaks.

Intake Manifold Tightening Sequence Tighten bolts progressively to 24 ft. lbs. (33 N.m). Scheme 64

Scheme 64: Intake Manifold Tightening Sequence Tighten bolts progressively to 24 ft. lbs. (33 N.m)
  1. Disconnect battery ground cables. Raise vehicle. Disconnect exhaust pipes from manifolds. Bend tabs back on left exhaust manifold. Remove bolts and manifold.
  2. Lower vehicle. On E250/E350 models, remove radiator fan shroud halves and dipsticks (with tubes) for engine and transmission. On all models, bend tabs back on right exhaust manifold. Remove bolts and manifold.

To install, reverse removal procedure.

  1. Disconnect battery ground cables. Drain cooling system. Remove overflow reservoir tube from the radiator neck and upper and lower radiator hoses from the radiator.
  2. Remove screws holding fan shroud halves together and screws attaching shroud halves to the radiator. Remove shroud.
  3. Using Fan Clutch Pulley Holder and Nut Wrench (T83T-6312-A and B), remove radiator fan and clutch assembly by turning nut clockwise (left-hand thread).
  4. Disconnect alternator and fuel supply line heater wiring from alternator. Remove alternator adjusting bolt and pivot bolt and remove alternator. Remove vacuum pump.
  5. Remove fuel filter inlet, outlet and return lines and cap lines and fittings with Protective Cap Set (T83T-6395-A). Remove alternator and vacuum pump mounting bracket and fuel filter bracket with filter attached. Remove heater hose from cylinder head.
  6. Remove injection pump and intake manifold. Remove crankcase depression regulator tube and grommet from valley pan. Remove bolts attaching valley pan strap to front of engine block and remove strap. Remove valley pan drain plug and valley pan.
  7. Raise vehicle. Disconnect exhaust pipes from exhaust manifolds. Remove bolt holding engine oil dipstick tube. Remove bolt attaching transmission oil dipstick tube to cylinder head.
  8. Lower vehicle. Remove right side engine oil dipstick and dipstick tube. Remove valve cover attaching screws and remove covers. Remove valve rocker arm post mounting bolts.
  9. Remove valve rocker arms, posts and push rods in order and mark for reinstallation. Clean each nozzle assembly, fuel inlet and fuel leak-off piping connections and surrounding area with clean fuel oil or solvent.
  10. Blow dry with compressed air. Remove fuel line retaining clamps from nozzle lines. Disconnect nozzle fuel inlet (high pressure) and fuel leak-off tees from each assembly and position out of the way. Cover open ends of fuel inlet lines and nozzles.
  11. Remove injection nozzles by turning counterclockwise. Carefully pull nozzle assembly with copper washer from engine and place in order for reinstallation.
  12. Cover nozzle assembly fuel inlet opening and nozzle tip with plastic cap. Remove glow plugs. Attach lifting eyes to each end of cylinder head and remove head. Remove head gasket.

Cylinder Head Tightening Sequence Tighten bolts in 4 steps to 75 ft. lbs. (101 N.m). Scheme 65

Scheme 65: Cylinder Head Tightening Sequence Tighten bolts in 4 steps to 75 ft. lbs. (101 N.m).

To install, reverse removal procedure. Head gasket requires no sealer. Tighten head bolts to 40 ft. lbs. (54 N.m), then to 65 ft. lbs. (88 N.m) in numerical sequence.

Then tighten bolts to 75 ft. lbs. (101 N.m). in line sequence. (Scheme 65) Retighten bolts to 75 ft. lbs. (101 N.m) in line sequence. Apply 1/8" bead of RTV sealant to each end of cylinder block before installing valley cover.

VALVE ARRANGEMENT

Left Bank: I-E-I-E-I-E-I-E (Front-to-rear).

Right Bank: E-I-E-I-E-I-E-I (Front-to-rear).

Removal & Installation

Remove valve cover attaching screws and remove covers. Remove valve rocker arm post mounting bolts. Remove valve rocker arms, posts and push rods in order and mark for reinstallation. To install, reverse removal procedure.

With cylinder head removed, compress valve spring and remove valve keepers. (Scheme 66) Release spring compressor and remove retainer, spring, damper, seal and valve rotators.

To install valve springs, reverse removal procedure. Lubricate and install valve stem oil seal using Valve Stem Seal Replacer (T83T-6571-A).

Removing Valve Spring. Scheme 66

Scheme 66: Removing Valve Spring

VALVE GUIDE SERVICING

If valve stem-to-guide clearance is excessive, insert sleeves are available. To install, drill out valve guide and ream drilled guide bore for insert sleeve. Chill valve guide in dry ice. Using arbor press, carefully press valve guide in cylinder head. Ream valve guide to proper size. Break sharp edge at top of guide using a scraper.

Note. Reface valve seat after installing new valve guides.

HYDRAULIC VALVE LIFTERS

Note. Hydraulic roller lifters are used. Service lifters as complete assemblies only. Do not interchange parts between lifters.

Keep lifters and push rods in order for installation in their original locations. Remove valve covers, rocker arm shafts and push rods. Remove lifter guide retainer. Remove lifters.

Disassembly

Using small screwdriver, remove plunger retainer. Remove push rod seat and metering valve. Remove plunger and plunger spring.

Inspection

Clean all parts in clean solvent or diesel fuel. Check for nicks, burrs or scoring on parts. Ensure lifter roller operates smoothly and without excessive play.

Reassembly

Coat all parts with clean engine oil. Reverse disassembly procedure.

Lubricate lifters and bores with clean engine oil. Install lifters into their original position in block. Install lifter guides and guide. To complete installation, reverse removal procedure.

Exploded View of Hydraulic Valve Lifter. Scheme 67

Scheme 67: Exploded View of Hydraulic Valve Lifter
  1. Disconnect battery ground cables. Drain cooling system. Remove air cleaner and cover intake opening. Remove overflow reservoir tube from the radiator neck and upper and lower radiator hoses from the radiator.
  2. Remove screws holding fan shroud halves together and screws attaching shroud halves to the radiator. Remove shroud.
  3. Using Fan Clutch Pulley Holder and Nut Wrench (T83T-6312-A and B), remove radiator fan and clutch assembly by turning nut clockwise (left-hand thread). Remove engine oil filler neck.
  4. Remove bolts attaching injection pump to drive gear. Disconnect electrical connectors to injection pump. Disconnect accelerator cable and speed control cable from throttle lever, if equipped.
  5. Remove accelerator cable bracket, with cables attached from intake manifold and position aside. Cap all fuel lines and fittings. Remove fuel filter-to-injection pump fuel line and cap fittings.
  6. Remove and cap injection pump inlet elbow and fitting adapter. Remove fuel return line on injection pump, rotate out of the way and cap all fittings. Remove fuel injection lines from nozzles and cap lines and nozzles.
  7. Using Injection Pump Mounting Wrench (T83T-9000-B), remove 3 nuts attaching injection pump to injection pump adapter. Lift injection pump, with nozzle lines attached, up and out of engine compartment.
  8. Loosen power steering pump and A/C compressor and remove drive belts. Loosen vacuum pump and alternator and remove drive belts. Remove water pump pulley.
  9. Disconnect heater hose from water pump. Remove heater hose fitting from water pump. Remove alternator adjusting arm and adjusting arm bracket.
  10. Remove A/C compressor and position out of the way. Remove A/C compressor brackets. Remove power steering pump and bracket and position out of the way. Remove water pump attaching bolts and pump.
  11. Raise vehicle. Remove crankshaft pulley. Remove bolt attaching damper to crankshaft. Install Vibration Damper Remover (T83T-6316-A) and remove vibration damper.
  12. Remove ground cables at front of engine. Remove 5 bolts attaching front cover to engine block and oil pan. Lower vehicle. Remove bolts attaching engine front cover to engine block and remove cover.

Clean all sealing surfaces. Apply gasket sealer to engine block sealing surfaces. Install engine block gaskets. Apply 1/8" bead of RTV sealant on front of engine block and 1/4" bead on front of oil pan. To complete installation, reverse removal procedure.

Removal (Out Of Vehicle)

Remove and support front cover. Using an arbor press, Drive Handle (T80T-4000-W) and a 3 1/4" diameter spacer, drive crankshaft seal out of front cover.

Installation (Out Of Vehicle)

Coat new front seal with polyethylene grease. Using Seal Installer (T83T-6700-A), a spacer and arbor press, install new seal.

Removal (In Vehicle)

  1. Disconnect battery cables. Remove screws holding fan shroud halves together and screws attaching shroud halves to the radiator. Remove shroud.
  2. Using Fan Clutch Puller and Nut Wrench (T83T-6312-A and B), remove radiator fan and clutch assembly by turning nut clockwise (left-hand thread).
  3. Loosen and remove A/C compressor, power steering pump, alternator and vacuum pump drive belts. Raise vehicle. Remove crankshaft pulley. Remove bolt attaching damper to crankshaft.
  4. Install Vibration Damper Remover (T83T-6316-A) and remove crankshaft vibration damper. Install breaker bar into remover to prevent crankshaft rotation. Carefully pry out front oil seal with a screwdriver.

Installation (In Vehicle)

  1. Coat new seal with polyethylene grease. If necessary, rotate crankshaft to align damper key with seal installer.
  2. On engines with 3 welded nuts on front cover, place seal into Seal Installer (T83T-6700). Install seal and installer over end of crankshaft and attach bridge to welded nuts. Draw seal into front cover by rotating center screw clockwise. When installer bottoms on front cover, seal is at proper depth.
  3. On engines without 3 welded nuts on front cover, place seal into Seal Installer (T83T-6700). Install seal and installer over end of crankshaft and tighten nut against washer and installer.
  4. On all engines, lubricate damper seal nose with engine oil and install crankshaft vibration damper using Damper Installer (T83T-6316-B). Apply RTV sealant to engine side of washer to prevent oil leakage past keyway.
  5. Install and tighten bolt attaching vibration damper to crankshaft. Install and tighten crankshaft pulley. Lower vehicle. To complete installation, reverse removal procedure.

Remove engine front cover. Remove camshaft allen screw. Install Gear Puller (T83T-6316-A) and remove gear.

To install, reverse removal procedure and adjust engine timing.

  1. Remove engine from vehicle and support on engine stand. Remove injection pump and adapter, intake manifold, hydraulic valve lifters and engine front cover.
  2. Using flare nut wrench, loosen fuel pump threaded connections and retighten snugly. Do not remove lines at this time.
  3. Loosen fuel pump mounting bolts 1-2 turns. Apply hand force to loosen fuel pump if gasket is stuck. Rotate engine by nudging starter until fuel pump cam lobe is at low position.
  4. Disconnect fuel pump inlet, outlet and fuel return line. Remove fuel pump attaching bolts, remove pump and discard gasket.
  5. Remove camshaft allen screw. Install Gear Puller (T83T-6316-A) and remove timing gear. Install Gear Puller (T77E-4220-B) and shaft protector and remove fuel pump cam and spacer.
  6. Remove thrust plate attaching bolts and thrust plate. Using Camshaft Bearing Driver (T65L-6250-A) and Camshaft Adapter (Rotunda 014-00314), carefully remove camshaft by pulling toward front of engine.

Lubricate camshaft journals and lobes with engine oil. Coat camshaft lobes with polyethylene grease. Position camshaft to align timing marks on gears. To complete installation, reverse removal procedure.

CAMSHAFT END PLAY

  1. Push camshaft toward rear of engine. Install dial indicator so indicator point is on camshaft sprocket attaching screw. Zero dial indicator.
  2. Place a large screwdriver between camshaft sprocket and cylinder block. Pull camshaft forward and release. Camshaft end play should be .001-.009" (.03-.23 mm). If end play is excessive, replace thrust plate.

Scheme 68

Scheme 68: CAM LOBE LIFT
  1. Remove fresh air inlet tube and air cleaner. Cover intake opening. Remove valve cover attaching screws and remove covers. Remove valve rocker arm post mounting bolts. Remove valve rocker arms and posts in order and mark for reinstallation.
  2. Use a dial indicator to check lobe lift in consecutive order. Position dial indicator point (or cup-shaped adapter) on push rod end (in same plane as push rod movement. (Scheme 68) (Scheme 68): Checking Camshaft Lobe Lift Ensure push rod is in valve lifter socket.
  3. Rotate crankshaft by hand until lifter and push rod are at lowest position. Zero dial indicator. Rotate crankshaft slowly until push rod is fully raised. Record dial indicator reading and compare with specifications.
  4. Maximum allowable lift loss is.005" (.13 mm). If any lobe lift is below specification, replace camshaft and valve lifter operating on worn lobe(s).

CAMSHAFT BEARINGS

Note. Camshaft bearings are not interchangeable from one bore to another.

Replace camshaft bearings with engine removed from vehicle. Remove camshaft, flywheel, crankshaft and rear bearing bore plug. Push pistons to top of cylinders. Remove camshaft bearings using camshaft bearing remover/installer.

  1. Using camshaft bearing installer/remover, install bearings into place. Ensure oil holes are properly aligned with holes in block.
  2. Install front bearing .040-.060" (1.02-1.52 mm) rearward of cylinder block front face. Check bearing installation with straightedge and feeler gauge. Install new rear bearing bore plug.
  1. Disconnect negative battery cables. Remove air cleaner and install Intake Opening Cover (T83T-9424-A). Remove oil filler neck. Remove bolts attaching injection pump to drive gear.
  2. Unplug electrical connectors to injection pump. Disconnect accelerator cable and speed control cable from throttle lever. Remove accelerator cable bracket, with cables attached, and position out of way.
  3. Disconnect and cap fuel inlet and return lines from fuel filter. Remove fuel filter and bracket as an assembly. Remove injection pump fuel line and cap fittings. Remove fuel injection lines from nozzles. Cap lines and nozzles to prevent contamination.
  4. Remove 3 nuts retaining injection pump to adapter. Remove injection pump. Remove injection pump adapter. DO NOT remove drive gear at this time. Remove glow plugs. Rotate crankshaft by hand so that No. 1 piston is at TDC on compression stroke. NOTE: To determine that No. 1 piston is at TDC on compression stroke, position injection pump drive gear dowel at 4 o'clock position. TDC mark on vibration damper should be aligned with pointer.
  5. Draw a line on front injection pump drive gear at 6 o'clock position where 1 chamfered tooth meshes between 2 chamfered teeth on camshaft gear (timing marks aligned). (Scheme 69) Ensure camshaft and crankshaft timing marks are aligned.

To install, reverse removal procedure. Time injection pump to housing. See INJECTION PUMP TIMING.

Aligning Injection Pump Timing Gear. Scheme 69

Scheme 69: Aligning Injection Pump Timing Gear

INJECTION PUMP TIMING

Loosen 3 nuts retaining injection pump to gear housing slightly to allow pump rotation. Align timing mark on pump with timing mark on housing. (Scheme 70)

Injection Pump Timing Marks. Scheme 70

Scheme 70: Injection Pump Timing Marks

OIL PAN

See OIL PAN REMOVAL article.

  1. Disconnect battery cables. Drain cooling system. Remove overflow reservoir tube from the radiator neck and upper and lower radiator hoses from the radiator.
  2. Remove screws holding fan shroud halves together and screws attaching shroud halves to the radiator. Remove shroud.
  3. Using Fan Clutch Pulley Holder and Nut Wrench (T83T-6312-A and B), remove radiator fan and clutch assembly by turning nut clockwise (left-hand thread).
  4. Loosen power steering pump, A/C compressor, vacuum pump and alternator and remove drive belts. Remove water pump pulley. Disconnect heater hose from water pump and remove fitting.
  5. Remove alternator adjusting nut and bracket. Remove A/C compressor and move out of the way. Remove A/C compressor brackets. Remove power steering pump and bracket and move out of the way. Remove water pump.
WARNINGEnsure that correct length bolts are installed in correct holes. (Scheme 71)

Water Pump. Scheme 71

Scheme 71: Water Pump

Clean all gasket mating surfaces. Install fabricated dowel pins for water pump alignment. (Scheme 72) Coat 2 top and bottom bolts with RTV sealer. Using new gasket, install pump. To complete installation, reverse removal procedure.

Water Pump & Front Cover Installation Dowels. Scheme 72

Scheme 72: Water Pump & Front Cover Installation Dowels

Note. For further information on cooling system capacities and other cooling system components, see ENGINE COOLING SYSTEMS article.

Scheme 73

Scheme 73: DRIVE BELT ROUTING
  1. With engine removed from vehicle, remove injection pump, intake manifold, cylinder heads, oil pan and oil pump. Place piston at bottom of stroke and cover with a cloth to collect cuttings.
  2. Use ridge reamer to remove any ridge or deposit on cylinder bore upper end. Ensure connecting rods and caps are marked for cylinder identification. CAUTION: Never cut more than 1/32" (.8 mm) into ring travel area.
  3. Remove rod cap and install protective sleeves on rod bolts. Push piston and rod out top of cylinder bore. Use care not to damage crankshaft journal or cylinder wall. Install rod cap on mating rod.

Scheme 74

Scheme 74: Installation
  1. Coat cylinder bore, piston and rings with engine oil. Ensure that ring gaps are properly spaced. (Scheme 74) Install a ring compressor on piston. (Scheme 74): Correct Spacing of Piston Rings
  2. Install each piston and rod assembly in its respective bore, with arrow (or notch) on piston head facing toward camshaft. NOTE: Large chamfer on connecting rod faces toward front of engine on right bank rods and toward rear of engine on left bank rods.
  3. Guide connecting rod onto crankshaft journal until connecting rod bearing seats on crankshaft. Install and tighten rod caps.
  4. Check bearing clearances using Plastigage method. Install oil pump and oil pan. To complete installation, reverse removal procedure.

FITTING PISTONS

Note. Take measurements with pistons and block at 70°F (21°C).

  1. Measure piston skirt 90° to piston pin axis. Measure cylinder bore 90° to crankshaft centerline, at top, middle, and bottom of bore. Use these measurements to determine piston-to-cylinder bore clearance.
  2. Measure cylinder bore 90° to crankshaft centerline at top of bore (below ring travel) and at bottom of bore (above ring travel). Taper (difference between the 2 measurements) must not exceed .005" (.13 mm).
  3. Measure cylinder bore at center of piston travel, 90° to crankshaft centerline. Measure bore at center of piston travel in line with crankshaft centerline. Out-of-round (difference between the 2 measurements) must not exceed .002" (.05 mm).
  4. If taper or out-of-round are excessive, or if cylinder walls are deeply scored, hone or bore cylinders for new pistons. Remove piston oil cooling jets before boring or honing engine block.

FITTING RINGS

  1. Carefully position ring in cylinder bore where normal ring wear is not present. Ring must be square in bore. Check ring end gap with a feeler gauge.
  2. Using a feeler gauge, check side clearance of compression rings. Feeler gauge should slide freely around entire circumference of piston without binding. If lower lands have high steps, replace piston.

Using arbor press and piston pin remover, press piston pin from piston and connecting rod.

  1. Lightly coat all parts to be assembled with engine oil. Position piston to connecting rod.
  2. Start piston pin in piston and connecting rod. Using arbor press and pin installer, press pin through piston and connecting rod until it is centered in connecting rod.

CONNECTING ROD BEARINGS

  1. Ensure rod caps are marked for cylinder identification. Place crankshaft journal of cylinder to be checked at bottom of stroke and remove rod cap.
  2. Place strip of Plastigage on bearing surface over full width of cap, about 1/4" (6 mm) off center and away from oil holes.
  3. Install cap and tighten. Do not turn crankshaft. Remove cap and measure compressed width of Plastigage.
  4. If necessary, regrind the crankshaft and install undersize bearings. Measure connecting rod side clearance after the bearings and caps have been installed. (Scheme 75)

Measuring Connecting Rod Side Clearance Side clearance is .008-.020" (.20-.51 mm). Scheme 75

Scheme 75: Measuring Connecting Rod Side Clearance Side clearance is .008-.020" (.20-.51 mm).

MAIN BEARINGS

  1. Fit main bearings one at a time, while leaving other bearings tightened. Ensure main bearing caps are marked for identification.
  2. Remove main bearing cap. Wipe oil from all contact surfaces such as crankshaft journal, bearing insert, bearing caps, etc.
  3. Use Plastigage method to measure main bearing clearance. If necessary, regrind crankshaft and install undersize bearings.

THRUST BEARING ALIGNMENT

  1. Install thrust bearing cap after all other main bearing caps have been tightened. Install thrust bearing cap bolts finger tight.
  2. Pry crankshaft forward against thrust surface of upper half of bearing. Hold crankshaft forward and pry thrust bearing cap rearward. Tighten cap bolts while retaining forward pressure on crankshaft. (Scheme 76)

Aligning Thrust Bearing Align thrust bearing after all other bearings have been tightened. Scheme 76

Scheme 76: Aligning Thrust Bearing Align thrust bearing after all other bearings have been tightened.

CRANKSHAFT END PLAY

  1. Push crankshaft to rear of engine. Install dial indicator with pointer perpendicular to crankshaft flywheel flange. Zero indicator. Rotate crankshaft forward and note dial reading. End play should be .002-.009" (.05-.23 mm).
  2. If end play is excessive, replace thrust bearing. If end play is less than .002" (.05 mm), realign thrust bearing or inspect thrust bearing faces for scratches or dirt.

Remove transmission. If equipped, remove clutch cover and clutch disc. Remove flywheel. Remove and support rear cover. Using an arbor press and 4 1/8" diameter spacer, remove rear oil seal. (Scheme 77)

Rear Main Bearing Oil Seal Removal. Scheme 77

Scheme 77: Rear Main Bearing Oil Seal Removal
  1. Clean rear cover and engine block gasket surfaces. Remove old RTV sealant from oil pan-to-rear cover sealing surface, clean with solvent and dry thoroughly.
  2. Coat new rear crankshaft oil seal with polyethylene grease. Using an arbor press and rear crankshaft Seal Installer (T83T-6701-A), install new rear main bearing oil seal. NOTE: Install seal from engine block side of rear cover, flush with seal bore inner surface.
  3. Install Rear Seal Pilot (T83T-6701-B) on crankshaft. Apply gasket sealant to engine block gasket surfaces. Install rear cover gasket to engine block.
  4. Immediately before installing the rear cover, apply a 1/4" bead of RTV sealant on the oil pan sealing surface. Push rear cover into position on engine block, install bolts and tighten. To complete installation, reverse removal procedure.

ENGINE OILING SYSTEM

Full pressure lubrication through a full flow oil filter and oil cooler is supplied by a gear-type oil pump. Main oil gallery feeds oil through passages to camshaft and crankshaft. Valve lifter gallery feeds valve lifters, which feed rocker arms through hollow push rods.

Engine Oiling System. Scheme 78

Scheme 78: Engine Oiling System

Crankcase Capacity

Crankcase capacity is 10 quarts (9.5L), including filter change.

Oil Filter

Replace oil filter every 5,000 miles or 12 months, whichever comes first.

Normal Oil Pressure

Normal oil pressure should be 40-60 psi (2.81-4.22 kg/cm 2 ) at 2000 RPM.

Oil Pressure Regulator Valve

Oil pressure regulator valve is located in oil pump body. Valve is nonadjustable.

Remove oil pan, oil pump and pick-up tube.

Note. Do not disassemble oil pump. It is serviced as a complete assembly only.

Remove old gasket material and clean mating surfaces of oil pan, oil pick-up tube, engine block and front and rear covers with solvent and dry thoroughly. Prime oil pump with engine oil. Rotate pump drive gear to distribute oil within pump body. Reverse removal procedure to install.

TORQUE SPECIFICATIONS

ApplicationFt.Lbs. (N.m)
Camshaft Gear Screw12-18 (17-24)
Connecting Rod Cap Bolts(1) 48-54 (65-73)
Cylinder Head Bolts(2) 75 (101)
Exhaust Manifold Bolts35 (47)
Flywheel-to-Crankshaft Bolts47 (64)
Injection Nozzle35 (47)
Injection Pump Adapter Bolts14 (19)
Injection Pump Outlet Fitting Nut22 (30)
Intake Manifold Bolts24 (33)
Main Bearing Cap Bolts(3) 95 (129)
Rocker Arm Bolts20 (27)
Vibration Damper-to-Crankshaft Bolt90 (122)
Water Pump Cover Bolts14 (19)
(1) Tighten in 2 steps. (2) Tighten in 4 steps. See text. (3) Tighten in 2 steps.
(1)Tighten in 2 steps.
(2)Tighten in 4 steps. See text.
(3)Tighten in 2 steps.

TORQUE SPECIFICATIONS

GENERAL ENGINE SPECIFICATIONS

ApplicationSpecification
Displacement
Cu. In.420
Liters6.9
Fuel SystemDiesel
HP @ RPM170 @ 3300
Torque Ft. Lbs. @ RPM315 @ 1400
Compr. Ratio20.7:1
Bore4.00" (101.6mm)
Stroke4.18" (106.2mm)

GENERAL ENGINE SPECIFICATIONS

VALVE SPECIFICATIONS

ApplicationIn. (mm)
Intake
Head DiameterN/A
Face Angle30°
Seat Angle30°
Seat Width.065-.095 (1.65-2.41)
Stem Diameter.3716-.3723 (9.439-9.456)
Stem Clearance.3717-3724 (9.441-9.459)
Valve LiftN/A
Exhaust
Head DiameterN/A
Face Angle37.5°
Seat Angle37.5°
Seat Width.065-.095 (1.65-2.41)
Stem Diameter.3717-.3724 (9.441-9.459)
Stem Clearance.0012-.0029 (.030-.074)
Valve LiftN/A

VALVE SPECIFICATIONS

PISTON/PIN/RING SPECIFICATIONS

ApplicationIn. (mm)
Piston Clearance.0055-.0075 (.140-.165)
Pins
Piston Fit.0003-.0007 (.008-.018)
Rod Fit.0004-.0008 (.010-.020)
Rings
Ring No. 1
End Gap.014-.024 (.36-.61)
Side Clearance.002-.004 (.05-.10)
Ring No. 2
End Gap.060-.070 (1.52-1.78)
Side Clearance.001-.003 (.03-.08)
Ring No. 3
End Gap.010-.024 (.25-.61)
Side Clearance.002-.004 (.05-.10)

PISTONS, PINS & RINGS SPECIFICATIONS

BEARING SPECIFICATIONS

ApplicationIn. (mm)
Main Bearings
Journal Diameter3.1228-3.1236 (79.319-79.339)
Clearance.0018-.0046 (.046-.117)
Thrust BearingNo. 3
Crankshaft End Play.002-.009 (.05-.23)
Connecting Rod Bearings
Journal Diameter2.4980-2.4990 (63.449-63.475)
Clearance.0011-.0036 (.028-.091)
Side Play.008-.020 (.20-.51)

CRANKSHAFT MAIN & CONNECTING ROD BEARINGS SPECS

VALVE SPRING SPECIFICATIONS

ApplicationSpecification
Intake & Exhaust
Free Length2.04" (51.8mm)
Pressure (1)
Valve Closed60 @ 1.80 (27 @ 45.7)
Valve OpenN/A
(1) Lbs. @ In. (Kg @ mm).
(1)Lbs. @ In. (Kg @ mm).

VALVE SPRINGS SPECIFICATIONS

CAMSHAFT SPECIFICATIONS

ApplicationIn. (mm)
Journal Diameter2.0990-2.1000 (53.315-53.340)
Clearance.001-.005 (.03-.13)
Lobe LiftN/A

CAMSHAFT SPECIFICATIONS