Pro Weld Performance Parts

Description & Operation

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DESCRIPTION AND OPERATION

Engine


The 4.6L (4V) (281 CID) Cobra Engine is a V-8 with the following features:

  • Intercooled Supercharger
  • Dual Overhead Camshafts
  • Four Valves Per Cylinder
  • Sequential Multiport Fuel Injection (SFI)
  • An Aluminum Intake Manifold
  • Aluminum Cylinder Heads
  • A Cast Iron, 90-degree V- Cylinder Block
  • Individually Chain-Driven Camshafts with a Hydraulic Timing Chain Tensioner on each Timing Chain
  • The Electronic Ignition System with Eight Ignition Coils

Identification


     Always refer to these labels when replacement parts are necessary or when checking engine calibrations. The engine parts often differ within a CID family. Verification of the identification codes will ensure that the correct parts are obtained. These codes contain all the pertinent information relating to the dates, optional equipment and revisions. The Ford Master Parts Catalog contains a complete listing of the codes and their application.


Code Information


  •       The engine code information label, located on the side of the valve cover and the front side of the valve cover, contains the following: 

  • Engine plant code
  • Engine code
  • Engine Build Date

Exhaust Emission Control System
 

     Operation and necessary maintenance of the exhaust emission control devices used on this engine is covered in the Powertrain Control/Emissions Diagnosis (PC/ED) manual.


Induction System


     The sequential multiport fuel injection (SFI) provides the fuel/air mixture needed for combustion in the cylinders. The eight solenoid-operated fuel injectors:  

  • Are mounted in the lower intake manifold.
  • Meter fuel into the air intake stream in accordance with engine demand.
  • Are positioned so that their tips direct fuel just ahead of the engine intake valves.
  • Are connected in series with the fuel pressure sensor.
  • Supply fuel from the fuel tank with a fuel pump mounted in the fuel tank.
  • Meter fuel into the air intake stream in accordance with engine demand.
  • Are positioned so that their tips direct fuel just ahead of the engine intake valves.
  • Are connected in series with the fuel pressure sensor.
  • Supply fuel from the fuel tank with a fuel pump mounted in the fuel tank.


     A constant fuel pressure drop is maintained across the fuel injectors by the fuel pressure sensor. The fuel pressure sensor:
 

  • Is positioned upstream from the fuel injectors on the fuel injection supply manifold.

Valve Train


The valve train operates as follows:

  • The inner rotor is piloted on the crankshaft post and is driven through flats on the crankshaft.
  • System pressure is limited by an integral, internally-vented relief valve which directs the bypassed oil back to the inlet side of the oil pump.
  • Oil pump displacement has been selected to provide adequate volume to ensure correct oil pressure both at hot idle and maximum speed.
  • The relief valve calibration protects the system from excessive pressure during high viscosity conditions.
  • The relief valve is designed to provide adequate connecting rod bearing lubrication under high-temperature and high-speed conditions
  • Ball-tip hydraulic lash adjusters provide automatic lash adjustment.
  • Roller followers ride on the camshaft lobes, transferring the up-and-down motion of the camshafts to the valves in the cylinder heads.

Positive Crankcase Ventilation System


     All engines are equipped with a closed-type positive crankcase ventilation system recycling the crankcase vapors to the upper intake manifold.
 

Lubrication System


The engine lubrication system operates as follows:


  • Oil is drawn into the oil pump through the oil pump screen cover and tube in the sump of the oil pan.
  • Oil is pumped through the oil bypass filter on the left front side of the cylinder block.
  • Oil enters the main oil gallery where it is distributed to the crankshaft main journals both cylinder heads.
  • From the main journals, the oil is routed through cross-drilled passages in the crankshaft to lubricate the connecting rod bearings. Controlled leakage through the crankshaft main bearings and connecting rod bearings is slung radially outward to cool and lubricate the cylinder walls as well as the entire connecting rod, piston and piston rings assembly.
  • The left cylinder head is fed from a drilling into the supply passage feeding the main gallery at the front of the cylinder block. The right cylinder head is fed from a drilling into the rear of the main gallery. Main gallery pressure is reduced as it enters the cylinder head galleries through fixed serviceable orifices located at the upper part of the feed passages. It is this reduced pressure in the cylinder head galleries which feeds the camshaft journals, the hydraulic lash adjusters and the primary and secondary timing chain tensioners.
  • The camshaft lobe and roller followers are lubricated by splash created through valve train operation.

  • Cooling System

    The engine cooling system includes the following:
    • Radiator
    • Water pump
    • The electric cooling fan motor and fan blade, activated by the variable control module
    • The degas bottle, which aids in maintaining the correct volume of engine coolant
    • Water thermostat
    • Upper radiator hose
    • Lower radiator hose
    • Heater water hoses


Cooling System

The engine cooling system includes the following:
  • Radiator
  • Water pump
  • The electric cooling fan motor and fan blade, activated by the variable control module
  • The degas bottle, which aids in maintaining the correct volume of engine coolant
  • Water thermostat
  • Upper radiator hose
  • Lower radiator hose
  • Heater water hoses


Drive Belt System
 

     The 4.6L (4V) DOHC engine is equipped with a serpentine drive belt. To ensure maximum life, a replacement drive belt should be of the same type as originally installed.

The accessories mounted on the front of the engine are belt-driven by the crankshaft.

The serpentine drive belt is routed over each accessory pulley, driven by the crankshaft pulley bolted to the crankshaft.



                                      
               CobraThrottleBodyDrawing.gif       




ITEM

PART NUMBER

DESCRIPTION

1

6F066

Supercharger Assembly

2

N806154

Screws (2 req’d)

3

9F715

Idle Air Control Valve

4

-

Idle Air Control Valve Gasket

5

9P697

Spacer Assembly

6

9E936

Throttle Body Gasket

7

9E929

Throttle Body

8

-

Bolts (4 req’d)

9

-

Bolts (2 req’d)

10

9E926

Throttle Position Sensor

11

-N804178

Nuts (4 req’d)

12

-

Studs (4 req’d)

13

-

Spacer Assembly gasket

14

-9D475

Exhaust Gas Recirculation Valve

15

-

Stud

16

9D477

Exhaust Gas Recirculation Tube

 

 

17

-

Manifold Absolute Pressure Sensor

18

9J460

Differential Pressure Feedback EGR System

19

9J459

Exhaust Gas Recirculation Vacuum Regulator

20

9J472

Vacuum Accessory Bracket



                               CobraBlowerDrawing.gif     



ITEM

PART NUMBER

DESCRIPTION

1

12B637

Wiring Harness

2

9C986

Fuel Pulse Damper

3

9F792

Fuel Injection Supply Manifold

4

9F593

Fuel Injector

5

-

Stud

6

9D475

Exhaust Gas Recirculation Valve

7

W701232

Bolt

8

N806979

Stud

9

-

EGR Vacuum Hoses

10

6F089

Vacuum Actuator Valve

11

N605892

Bolts (2 req’d)

12

-

Bolts 10 req’d)

13

9J447

Lower Intake Manifold

14

9L438

Coolant Intake Manifold Gasket

15

-

Coolant Tubes

16

9N491

Coolant Intake Manifold

17

W701592

Bolt

18

NL443

Inter Cooler Hose

19

N1443

Inter Cooler Hose

20

W506404

Bolts (10 req’d)

21

6K755

Charge Air Cooler

22

6F066

Supercharger Assembly

23

N605892

Bolt

24

9726

Accelerator Cable Bracket



 
                                   CobraFrontAssemblyDrawing.gif          


ITEM

PART NUMBER

DESCRIPTION

1

N605904

Bolt

2

N620480

Nut

3

6A946

Cover

4

17K814

Alternator Bracket Assembly

5

N811268

Bolts (2 req’d)

6

8620

Accessory Drive Belts

7

N606543

Bolts (4 req’d)

8

6L266

Timing Chain Tensioner

9

6268

Timing Chain (2 req’d)

10

6M256

Timing Chain Guide

11

6L266

Timing Chain Tensioner

12

6L253

Timing Chain Tensioner Arm

13

6268

Timing Chain (2 req’d)

14

N804958

Bolts (2 req’d)

15

6B274

Timing Chain Guide

16

N606527

Bolt

17

19D269

AC Compressor

18

N806184

Bolts (3 req’d)

19

6306

Crankshaft Sprocket

20

6L253

Timing Chain Tensioner Arm

21

12A227

Ignition Pulse Ring

22

6C086

Engine Front Cover

23

N806177

Bolts (8 req’d)

24

N806300

Studs (5 req’d)

25

6700

Crankshaft Front Seal

26

6316

Crankshaft Pulley

27

N806165

Washer

28

W701512

Stud

29

8A5282

 

Water Pump Pulley

30

N806282

Botls (4 req’d)

32

8501

Water Pump

33

N808102

Bolt

34

19A216

Belt Idler Pulley

35

N804178

Nut

36

N806300

Harness Support Bracket

37

N806300

Stud

38

N806155

Bolt

39

6C315

Crankshaft Position Sensor

40

N806155

Bolt

41

6B288

Camshaft Position Sensor

42

B808920

Bolts (3 req’d)

43

6C254

Crankshaft Extension Support Pulley

44

10153

Lower Support Bracket

45

N605909

Bolts 2 (req’d)

46

8620

Accessory Drive Belt

47

N811268

Bolt

48

8B603

Belt Idler Bracket Support

49

N808198

Stud

50

9N491

Hose and Tube Assembly



                                                              CobraHeadDrawing1.gif           







ITEM

PART NUMBER

DESCRIPTION

1

6083

Cylinder Head Gasket

2

-

Bolt (2 req’d)

3

-

Washer (2 req’d0

4

6255

Spacer

5

-

Secondary Timing Chain (2 req’d)

6

-

Screw & Washer

7

6C271

Timing Chain Vibration Damper

8

6B277

Camshaft Bearing Cap

9

-

Bolt (24 req’d)

10

6A271

Canshaft

11

6529

Roller Follower (8 req’d)

12

6C501

Hydraulic Lash Adjuster

13

6065

Bolt 20 req’d)

14

6A273

Camshaft

15

6B278

Camshaft Bearing Cap (2 req’d)

16

9448

Exhaust Manifold Gasket

17

9F485

EGR Valve Tube to Manifold Connector

18

W701706

Nut (8 req’d)

19

9431

Exhaust Manifold

20

6C324

PVC Tube

21

6A505

Valve Cover

22

N808199

Bolt (20 req’d)

23

6766

Oil Fill Cap

24

12A366

Ignition Coils

25

6P068

Ignition Coil Cover

26

N807309

Bolt (4 req’d)

27

6050

Cylinder head




               CobraPistonHeadDrawing.gif       





ITEM

PART NUMBER

DESCRIPTION

1

6214

Bolt (2 req’d)

2

6211

Connecting Rod Bearing (16 req’d)

3

6140

Piston pin Retainer (16 req’d)

4

6135

Piston Pin (8 req’d)

5

6110

Piston (8 req’d)

6

6159

Piston Ring (8 req’d)

7

6159

Piston Ring (8 req’d)

8

6150

Piston Ring (8 req’d)

9

6152

Piston Ring (8 req’d)

10

6758

Crankcase Vent Tube & Connector

11

6582

Valve Cover

12

6051

Cylinder Head gasket

13

W701706

Nut (8 req’d)

14

9430

Exhaust Manifold

15

9448

Exhaust Manifold gasket

16

W701681

Stud (8 Req’d)

17

6049

Cylinder head

18

6C527

Spark Plug Gasket (8 req’d)

19

6200

Connecting Rod 98 req’d)

20

6200

Connecting Rod (8 req’d)

21

6161

Piston Ring 98 req’d)






                      CobraBlockDrawing.gif 







 

ITEM

PART NUMBER

DESCRIPTION

1

8555

Water By-Pass Tube

2

6750

Oil Level Indicator

3

6754

Oil Level Indicator Tube

4

N806155

Bolt

5

6C358

Bolt (10 Req’d)

6

6714

Oil Bypass Filter

7

6A642

Oil Cooler

8

N806156

Bolt (4 req’d)

9

9278

Oil Pressure Sender

10

6884

Oil Filter Adapter

11

6A636

Oil Filter Adapter gasket

12

N620482

Dowel

13

87836

Plug






                  CobraFlywheelDrawing.gif               





1

N807198

Dowel Pin (2 Req’d)

2

N807309

Bolt

3

N807959

Bolt

4

18663

Heater Water Hose

5

W500110

Bolt (2 Req’d)

6

12A699

Knock Sensor (2 Req’d)

7

N807309

Bolt (2 req’d)

8

18696

Heater Water Hose

9

7120

Pilot Bearing

10

6K318

Crankshaft Rear Retainer

11

N806155

Bolt (6 req’d)

12

6310

Crankshaft oil Slinger

13

6375

Flywheel

14

N808139

Bolt (8 Req’d)

15

7550

Clutch Disc

16

7563

Clutch Pressure Plate

17

N808969

Bolt (6 Req’d)

18

6701

Crankshaft Oil Seal

19

N806007

Dowel Pin (2 Req’d)







CobraOilPanDrawing.gif











1

N806177

Bolt 94 Req’d)

2

N806459

Dowel (4 Req’d)

3

6A341

Thrust Washer

4

6303

Crankshaft

5

6A339

Thrust Bearing

6

6325

Main Bearing Cap (5 Req’d)

7

6345

Bolt (10 Req’d)

8

6K25

Main Bearing Cap (5 Req’d)

9

6687

Bolt (10 Req’d)

10

N806180

Spacer

11

N605904

Bolt

12

6710

Oil Pan Gasket

13

6675

Oil Pan

14

W701240

Bolt (16 Req’d)

15

6622

Oil Pump Screen Pickup& Tube

16

N806155

Bolt (2 Req’d)

17

N811280

Spacer (3 req’d)

18

6345

Bolt (6 Req’d)

19

6C360

Main Bering Cap Adjusting Screw (10 Req’d)

20

6A338

Crankshaft Main Bearing (4 Req’d)

21

N806201

Woodruff Key

22

6621

Oil Pump

23

N806183

Bolt (4 Req’d)

24

6333

Crankshaft Main Bearing

25

8501

Water Pump


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Pro Weld

5937 Ethan Drive

Burlington, KY 41005

859-586-4069

Proweld@myway.com