Gary's Garagemahal (the Bullnose bible)
  • Bullnose Forum
    • Ford Truck Show
    • Forum FAQ's
    • Member's Map
  • Bullnose FAQ's
  • Calibration Info & Part #'s
  • Cooling Systems
    • Cooling Fan #'s & Illustrations
    • Cooling System Illustrations
    • Coolant Recovery & Windshield Washer Reservoirs
    • Elbows
    • Heater Hoses
    • Hose Clamps
    • Radiator Hoses
    • Radiator Support
    • Radiator Part #'s
    • Shroud Part #'s
    • Thermostats
    • Water Pump #'s & Illustrations
  • Driveline
    • 4WD Front Hubs & Rotors
    • Axles & Differentials
    • Bell Housings
    • Brakes
    • Calculators
    • Clutches and Linkage
    • Drive Shafts >
      • Coupling Shaft
      • 4WD Driveshafts
      • Rear Driveshafts >
        • F100 2wd Driveshafts
        • F150 2wd Driveshafts
        • F150 4wd Driveshafts
        • F250 2wd Driveshafts
        • F250 4wd Driveshafts
        • Rear Axle Vents
        • F350 2wd Driveshafts
        • F350 4wd Driveshafts
      • U-Joints
    • Engine Plates
    • Skid Plates
    • Transfer Cases
    • Transmissions >
      • Transmission & Transfer Case Ratios
      • Automatic Transmissions >
        • C6
        • Kickdown Linkage
        • Neutral Start Switch
      • Manual Transmissions >
        • General Manual Transmission Service
        • NP435
        • T-18
        • T-19
        • ZF5
    • Speedometer Gears
    • Wheels
    • Wheel Covers
  • Electrical
    • 3G Conversion
    • Alternators
    • Ammeter
    • Batteries
    • Battery Cables
    • Battery Trays
    • Circuit Protection
    • Clocks
    • Computer Internals
    • Distributors
    • EEC-IV Diagnostics
    • Electricity 099
    • EVTM >
      • 1981 EVTM
      • 1985 EVTM
      • 1986 EVTM
    • Gauges
    • Ground Wires >
      • Engine-to-Firewall Ground
      • Battery to Ground
      • Battery to RH Fender
      • Firewall to Hood
    • ICVR
    • Ignition
    • Lighting >
      • Dome and Cargo Lights
      • Fog or Driving Lights
      • Headlight Wiring Harness
      • Tag Lights
    • PMGR Starter Wiring
    • Radios
    • Relays
    • Sending Units
    • Standard Wire And Color Codes
    • Switches
    • Tachometers
    • Voltage Drop Testing
    • Windshield Wipers
    • Wiring Connectors
    • Wiring Diagrams
  • Emissions
    • Inferred Mileage
    • Thermactor Systems
  • Engines
    • Engine Building Basics
    • 3.8L (232) V6
    • 300 Six
    • Windsor Series
    • 351M and 400
    • 385 Series
    • IDI Diesel
    • Drive Belts
    • EGR Valves >
      • EGR System Description & Testing
      • EGR Spacer
      • Gasket: Carb/EGR to Intake (9447)
    • Flywheels
    • Manifolds, EGR, Heat Valves, etc
    • Engine Swaps >
      • 300 Six to Small-Block V8
    • Pulleys
    • Starters
  • Exhaust Systems
  • Exterior
    • Beds, Tailgates, and Components
    • Bumpers
    • Exterior Mirrors
    • Exterior Trim and Moulding
    • Frames >
      • Engine Perches
    • Fuel Filler Doors
    • Name Plates
    • Push Bars
    • Spare Tire Carriers
  • Fuel Systems
    • 1985-1986 Fuel System Adjustments
    • 460 Fuel Systems
    • Air Cleaners >
      • Air Cleaner Illustrations
      • Air Cleaner Heat Tube
      • Air Cleaner Housing #'s
      • Air Cleaner Snorkels
      • Air Cleaner Tube #'s
      • Hot Air Shroud
    • Carburetors, Chokes, & EFI >
      • EFI Idle Speed Adjustment
      • Jetting
      • How To Find Carb Parts
      • Chokes
      • Carter YFA 1bbl
      • EFI
      • Edelbrock
      • Motorcraft 2150
      • Holley 4180C
      • Motorcraft 7200 VV
    • Diagnostics
    • Fuel System Illustrations >
      • Fuel Filler Pipes
      • 1980-84 F-Series & Bronco
      • 1983-84 F-Series Diesel
      • 1983-87 F350 Chassis Cab DRW
      • 1985 F-Series 302 w/EFI
      • 1985-87 Bronco
      • 1985 on F-Series
    • Fuel System Part #'s >
      • Fuel Filler Pipes
      • Fuel Senders & Pumps
      • Fuel Tanks
      • Fuel Tank Selector Switch
      • Fuel Tank Selector Valve
      • Fuel Vapor Valve
      • Fuel Vapor Separator
    • Fuel System Wiring
  • Fasteners & Illustrations
    • Frame
    • Front Clip >
      • Fenders and Aprons
      • Hood
      • Radiator and Grille
      • Headlights and Turn Signals
      • Wheelwell Moulding
      • Fastener Pictures >
        • 10756
        • 13032
        • 45260-S2
        • 55734
        • 55914-S2
        • 55914-S36
        • 56904-S
        • N56912-S2
        • 372046-S
        • 384439-S47X
        • 384931
        • 385324
        • 385579-S2
        • 385661-S
        • 386132
        • 387324-S
        • 605892-S
        • N606675-S36
        • N606676-S36
        • N606677-S36
        • N606689-S2
        • N606690-S2
        • N606702-S36
        • N610019-S
        • N610025-S
        • 610056-S36
        • N623332-S2
        • N623333-S2
        • N623342-S2
        • N623343-S2
        • N623344-S2
        • N800297-S36
        • N800335-S100
        • N800428
        • N800488-S
        • N800576-S426
        • N801521-S2
        • N803387
  • HVAC
    • HVAC Systems
    • 300 Six Compressor Illustrations
    • Factory A/C Brackets
  • Interchange
    • Air Conditioning Interchange
    • Alternator Interchange
    • Brake Interchange
    • Carburetor Interchange
    • Crankshaft Interchange
    • Diesel Injector Pump Interchange
    • Distributor Interchange
    • Fuel Pump Interchange
    • Head Interchange
    • Starter Interchange
    • Steering Interchange
    • Window Lift Motor Interchange
    • Water Pump Interchange
  • Interior
    • Boots
    • Dash
    • Doors >
      • Door Locks
      • Door Panels
      • Electric Windows & Locks
      • Handles & Boot
      • Vent Windows
      • Windows
    • Horn Pads
    • Instrument Panel Name Plates
    • Instrument & Radio Bezels
    • Kick Panels
    • Painting Gauge Needles
    • Rear Corner Trim
    • Salvaging Rosewood
    • Seat Belts
    • Seat Interchangeability
    • Sill Plates
    • Steering Columns
    • Interior Trim
  • Literature
    • 1980 Literature
    • 1981 Literature
    • 1982 Literature
    • 1983 Literature
    • 1984 Literature
    • 1985 Literature
    • 1986 Literature
    • Miscellaneous Literature >
      • Centurion
      • Service Life
  • Picture Galleries
    • 1983 Ford Bronco 4x4 Dobbs-Stroppe Team Chase Car
    • 1983 Bronco Survivor
    • 1984 Bronco XLT
    • 1984 F150 XL
    • 1984 F150 Survivor
    • 1985 F-150 Survivor
    • Big Blackie
    • Big Blue >
      • Big Blues Documentation
    • Dad's Truck >
      • Air Cleaner
      • Aluminum Wheel Refinishing
      • Electrical Components >
        • Alternator
        • Battery
        • Power Distribution
      • Gauges
      • Engine
      • Frame
      • Seats
      • Transfer Case
      • Transmission
    • Rusty
  • Specifications
    • Assembly Plants
    • Axle Ratios
    • Body Codes - Interior
    • Build Sheet Interpretation
    • Dimensions and Weights
    • Interior Paint
    • Calibration Codes
    • Certification Label
    • DSO Codes
    • Electrical
    • Engine Codes
    • Exterior Paint Codes
    • Lubricant Specifications
    • Model Codes
    • Spring Codes
    • Standard Features And Options
    • Towing
    • Transmission Codes
    • Tape Stripe Codes >
      • Bronco Tape Stripe Codes
      • F-Series Tape Stripe Codes
    • VIN Decoding
  • Suspension & Steering
    • 2WD Spindles
    • Alignment
    • Body Mounts
    • Crossmembers
    • Front Suspension
    • Steering >
      • Coupling - Rag Joint
      • Power Steering Brackets
      • Power Steering Illustrations
      • Pulleys
      • Steering Columns
      • Steering Gear Box
      • Tie Rods and Drag Links
    • Rear Suspension >
      • Auxiliary Springs
      • Rear Springs
    • Sway Bar
  • TSB's
    • TSB Index
    • TSB Bulletin List
    • Body/Windnoise/Water Leaks/Trim >
      • 81-06-13 Bumper Guard & Tire Carrier
      • 81-7-23 Seat Belts Become Too Tight
      • 83-3-15 Pickup Box Alignment
      • 81-06-15 Pickup Box Wood Floor Replacement
      • 83-13-4 Sheet Metal Welding Procedures
      • 83-16-17 Pickup Box Lean
      • 83-24-18 Swing-Lock Mirror Moves
      • 83-13-22 Electric Mirror Loose Glass
      • 83-24-19 Mirror Head Vibration
      • 87-01-18 Tool Box Mount
    • Electrical / Climate Control / Starting / Charging >
      • 81-1-10 FM Radio Interference
      • 81-7-24 Temperature Control Cable Too Long
      • 84-24-9 Noise - Radio Ignition Buzz
      • 87-03-07 EEC-IV Driveability TSB Summary
      • 87-07-20 Radio Ignition Noise
      • 87-21-10 EEC-IV Diagnostics
      • 88-05-07 Malfunction Indicator Light Introduction
      • 89-22-08 Emissions Maintenance Warning Module
      • 96-21-04 2G Alternator Repair
    • Brakes/Steering/Suspension/Wheels >
      • 80-14-14-S STEERING
      • 81-06-04 Integral Power Steering Gear
      • 81-06-16 Front Wheel Grease Seal Gaskets
      • 81-06-17 Rear Parking Brake Cables
      • 81-2-25 REAR SUSPENSION TORQUE SPECS
      • 89-19-01 Brake Noise Recap Of TSB's
      • 89-25-16 Brake Ride Height Proportioning Valve
      • 97-03-10 Frame Creaking/Popping
    • Engine/Cooling System/Exhaust >
      • 81-2-27 ENGINE DETONATION
      • 83-13-7 Correct Oil Fill Level
      • 83-25-21 Air Cleaner Sealing
      • 83-13-8 RTV Sealant - New Material
      • 87-06-10 Stall/No Start: TFI
      • 88-07-16 4.9L Exhaust Manifold Warping
    • Transmission/Clutch/Driveshaft/Axle >
      • 81-5-15 AOD TRANSMISSION
      • 81-06-18 Clutch Housing Fills w/Mud/Dirt
      • 81-07-25 Clutch Shudder/Chatter In Reverse
      • 81-7-26 Missing Shims On SROD
      • 82-25-16(S) Upshift Indicator Light
      • 83-3-23 Axle Lubricant Drain And Refill
      • 83-23-17 8.8" Rear Axle Vent
      • 84-24-13 Transfer Case - Grinding/Block-Out
      • 90-16-07 High Clutch Effort
    • Driveability/Fuel/Ignition/Emissions >
      • 81-6-19 Cold Driveaway Performance Improvements
      • 81-6-20 Piston Slap During Cold Driveaway
      • 81-6-21 Power Valve Vacuum Hose
      • 83-11-12-S Stall/No Start/Hessitation
      • 88-05-14 Low Oil Pressure
      • 91-25-07 IAC Bypass
      • EMW Module
    • Noise/Vibration/Ride/Squeaks/Rattles >
      • 80-1-12-S REAR SPRING SQUEAK
    • Miscellaneous/General >
      • 83-14-1 UNDERHOOD PRODUCTION STAMP RELOCATION
    • Health/Safety/Environmental Hazard information
    • CALIBRATION: 4-53F-R00
    • Fuel Cross-Flow
  • Underhood
    • Cowl Seal
    • Engine Compartment Lamp
    • Fender Aprons
    • Speed Control
    • Tool Box
    • Vacuum Systems >
      • Vacuum Diagrams >
        • 300 Six
        • 302/5.0L
        • 351W
        • 351M/400
        • 460 V8
      • Vacuum Reservoirs
  • Metrics
  • About Me/Contact Me
    • Youth Classes >
      • Automotive Maintenance >
        • Fall of 2015
      • Building Web Sites >
        • Lesson 1
        • Lesson 2
        • Lesson 3
        • LTC
      • Overview of Paul's Life, Journeys, & Works >
        • Lesson 1
        • Lesson 2
    • Projects >
      • Engine Cradle
      • Gauge Pocket
      • Rear Bumper And Spare Tire Carrier
  • Year-To-Year Differences
  • Bullnose Forum
    • Ford Truck Show
    • Forum FAQ's
    • Member's Map
  • Bullnose FAQ's
  • Calibration Info & Part #'s
  • Cooling Systems
    • Cooling Fan #'s & Illustrations
    • Cooling System Illustrations
    • Coolant Recovery & Windshield Washer Reservoirs
    • Elbows
    • Heater Hoses
    • Hose Clamps
    • Radiator Hoses
    • Radiator Support
    • Radiator Part #'s
    • Shroud Part #'s
    • Thermostats
    • Water Pump #'s & Illustrations
  • Driveline
    • 4WD Front Hubs & Rotors
    • Axles & Differentials
    • Bell Housings
    • Brakes
    • Calculators
    • Clutches and Linkage
    • Drive Shafts >
      • Coupling Shaft
      • 4WD Driveshafts
      • Rear Driveshafts >
        • F100 2wd Driveshafts
        • F150 2wd Driveshafts
        • F150 4wd Driveshafts
        • F250 2wd Driveshafts
        • F250 4wd Driveshafts
        • Rear Axle Vents
        • F350 2wd Driveshafts
        • F350 4wd Driveshafts
      • U-Joints
    • Engine Plates
    • Skid Plates
    • Transfer Cases
    • Transmissions >
      • Transmission & Transfer Case Ratios
      • Automatic Transmissions >
        • C6
        • Kickdown Linkage
        • Neutral Start Switch
      • Manual Transmissions >
        • General Manual Transmission Service
        • NP435
        • T-18
        • T-19
        • ZF5
    • Speedometer Gears
    • Wheels
    • Wheel Covers
  • Electrical
    • 3G Conversion
    • Alternators
    • Ammeter
    • Batteries
    • Battery Cables
    • Battery Trays
    • Circuit Protection
    • Clocks
    • Computer Internals
    • Distributors
    • EEC-IV Diagnostics
    • Electricity 099
    • EVTM >
      • 1981 EVTM
      • 1985 EVTM
      • 1986 EVTM
    • Gauges
    • Ground Wires >
      • Engine-to-Firewall Ground
      • Battery to Ground
      • Battery to RH Fender
      • Firewall to Hood
    • ICVR
    • Ignition
    • Lighting >
      • Dome and Cargo Lights
      • Fog or Driving Lights
      • Headlight Wiring Harness
      • Tag Lights
    • PMGR Starter Wiring
    • Radios
    • Relays
    • Sending Units
    • Standard Wire And Color Codes
    • Switches
    • Tachometers
    • Voltage Drop Testing
    • Windshield Wipers
    • Wiring Connectors
    • Wiring Diagrams
  • Emissions
    • Inferred Mileage
    • Thermactor Systems
  • Engines
    • Engine Building Basics
    • 3.8L (232) V6
    • 300 Six
    • Windsor Series
    • 351M and 400
    • 385 Series
    • IDI Diesel
    • Drive Belts
    • EGR Valves >
      • EGR System Description & Testing
      • EGR Spacer
      • Gasket: Carb/EGR to Intake (9447)
    • Flywheels
    • Manifolds, EGR, Heat Valves, etc
    • Engine Swaps >
      • 300 Six to Small-Block V8
    • Pulleys
    • Starters
  • Exhaust Systems
  • Exterior
    • Beds, Tailgates, and Components
    • Bumpers
    • Exterior Mirrors
    • Exterior Trim and Moulding
    • Frames >
      • Engine Perches
    • Fuel Filler Doors
    • Name Plates
    • Push Bars
    • Spare Tire Carriers
  • Fuel Systems
    • 1985-1986 Fuel System Adjustments
    • 460 Fuel Systems
    • Air Cleaners >
      • Air Cleaner Illustrations
      • Air Cleaner Heat Tube
      • Air Cleaner Housing #'s
      • Air Cleaner Snorkels
      • Air Cleaner Tube #'s
      • Hot Air Shroud
    • Carburetors, Chokes, & EFI >
      • EFI Idle Speed Adjustment
      • Jetting
      • How To Find Carb Parts
      • Chokes
      • Carter YFA 1bbl
      • EFI
      • Edelbrock
      • Motorcraft 2150
      • Holley 4180C
      • Motorcraft 7200 VV
    • Diagnostics
    • Fuel System Illustrations >
      • Fuel Filler Pipes
      • 1980-84 F-Series & Bronco
      • 1983-84 F-Series Diesel
      • 1983-87 F350 Chassis Cab DRW
      • 1985 F-Series 302 w/EFI
      • 1985-87 Bronco
      • 1985 on F-Series
    • Fuel System Part #'s >
      • Fuel Filler Pipes
      • Fuel Senders & Pumps
      • Fuel Tanks
      • Fuel Tank Selector Switch
      • Fuel Tank Selector Valve
      • Fuel Vapor Valve
      • Fuel Vapor Separator
    • Fuel System Wiring
  • Fasteners & Illustrations
    • Frame
    • Front Clip >
      • Fenders and Aprons
      • Hood
      • Radiator and Grille
      • Headlights and Turn Signals
      • Wheelwell Moulding
      • Fastener Pictures >
        • 10756
        • 13032
        • 45260-S2
        • 55734
        • 55914-S2
        • 55914-S36
        • 56904-S
        • N56912-S2
        • 372046-S
        • 384439-S47X
        • 384931
        • 385324
        • 385579-S2
        • 385661-S
        • 386132
        • 387324-S
        • 605892-S
        • N606675-S36
        • N606676-S36
        • N606677-S36
        • N606689-S2
        • N606690-S2
        • N606702-S36
        • N610019-S
        • N610025-S
        • 610056-S36
        • N623332-S2
        • N623333-S2
        • N623342-S2
        • N623343-S2
        • N623344-S2
        • N800297-S36
        • N800335-S100
        • N800428
        • N800488-S
        • N800576-S426
        • N801521-S2
        • N803387
  • HVAC
    • HVAC Systems
    • 300 Six Compressor Illustrations
    • Factory A/C Brackets
  • Interchange
    • Air Conditioning Interchange
    • Alternator Interchange
    • Brake Interchange
    • Carburetor Interchange
    • Crankshaft Interchange
    • Diesel Injector Pump Interchange
    • Distributor Interchange
    • Fuel Pump Interchange
    • Head Interchange
    • Starter Interchange
    • Steering Interchange
    • Window Lift Motor Interchange
    • Water Pump Interchange
  • Interior
    • Boots
    • Dash
    • Doors >
      • Door Locks
      • Door Panels
      • Electric Windows & Locks
      • Handles & Boot
      • Vent Windows
      • Windows
    • Horn Pads
    • Instrument Panel Name Plates
    • Instrument & Radio Bezels
    • Kick Panels
    • Painting Gauge Needles
    • Rear Corner Trim
    • Salvaging Rosewood
    • Seat Belts
    • Seat Interchangeability
    • Sill Plates
    • Steering Columns
    • Interior Trim
  • Literature
    • 1980 Literature
    • 1981 Literature
    • 1982 Literature
    • 1983 Literature
    • 1984 Literature
    • 1985 Literature
    • 1986 Literature
    • Miscellaneous Literature >
      • Centurion
      • Service Life
  • Picture Galleries
    • 1983 Ford Bronco 4x4 Dobbs-Stroppe Team Chase Car
    • 1983 Bronco Survivor
    • 1984 Bronco XLT
    • 1984 F150 XL
    • 1984 F150 Survivor
    • 1985 F-150 Survivor
    • Big Blackie
    • Big Blue >
      • Big Blues Documentation
    • Dad's Truck >
      • Air Cleaner
      • Aluminum Wheel Refinishing
      • Electrical Components >
        • Alternator
        • Battery
        • Power Distribution
      • Gauges
      • Engine
      • Frame
      • Seats
      • Transfer Case
      • Transmission
    • Rusty
  • Specifications
    • Assembly Plants
    • Axle Ratios
    • Body Codes - Interior
    • Build Sheet Interpretation
    • Dimensions and Weights
    • Interior Paint
    • Calibration Codes
    • Certification Label
    • DSO Codes
    • Electrical
    • Engine Codes
    • Exterior Paint Codes
    • Lubricant Specifications
    • Model Codes
    • Spring Codes
    • Standard Features And Options
    • Towing
    • Transmission Codes
    • Tape Stripe Codes >
      • Bronco Tape Stripe Codes
      • F-Series Tape Stripe Codes
    • VIN Decoding
  • Suspension & Steering
    • 2WD Spindles
    • Alignment
    • Body Mounts
    • Crossmembers
    • Front Suspension
    • Steering >
      • Coupling - Rag Joint
      • Power Steering Brackets
      • Power Steering Illustrations
      • Pulleys
      • Steering Columns
      • Steering Gear Box
      • Tie Rods and Drag Links
    • Rear Suspension >
      • Auxiliary Springs
      • Rear Springs
    • Sway Bar
  • TSB's
    • TSB Index
    • TSB Bulletin List
    • Body/Windnoise/Water Leaks/Trim >
      • 81-06-13 Bumper Guard & Tire Carrier
      • 81-7-23 Seat Belts Become Too Tight
      • 83-3-15 Pickup Box Alignment
      • 81-06-15 Pickup Box Wood Floor Replacement
      • 83-13-4 Sheet Metal Welding Procedures
      • 83-16-17 Pickup Box Lean
      • 83-24-18 Swing-Lock Mirror Moves
      • 83-13-22 Electric Mirror Loose Glass
      • 83-24-19 Mirror Head Vibration
      • 87-01-18 Tool Box Mount
    • Electrical / Climate Control / Starting / Charging >
      • 81-1-10 FM Radio Interference
      • 81-7-24 Temperature Control Cable Too Long
      • 84-24-9 Noise - Radio Ignition Buzz
      • 87-03-07 EEC-IV Driveability TSB Summary
      • 87-07-20 Radio Ignition Noise
      • 87-21-10 EEC-IV Diagnostics
      • 88-05-07 Malfunction Indicator Light Introduction
      • 89-22-08 Emissions Maintenance Warning Module
      • 96-21-04 2G Alternator Repair
    • Brakes/Steering/Suspension/Wheels >
      • 80-14-14-S STEERING
      • 81-06-04 Integral Power Steering Gear
      • 81-06-16 Front Wheel Grease Seal Gaskets
      • 81-06-17 Rear Parking Brake Cables
      • 81-2-25 REAR SUSPENSION TORQUE SPECS
      • 89-19-01 Brake Noise Recap Of TSB's
      • 89-25-16 Brake Ride Height Proportioning Valve
      • 97-03-10 Frame Creaking/Popping
    • Engine/Cooling System/Exhaust >
      • 81-2-27 ENGINE DETONATION
      • 83-13-7 Correct Oil Fill Level
      • 83-25-21 Air Cleaner Sealing
      • 83-13-8 RTV Sealant - New Material
      • 87-06-10 Stall/No Start: TFI
      • 88-07-16 4.9L Exhaust Manifold Warping
    • Transmission/Clutch/Driveshaft/Axle >
      • 81-5-15 AOD TRANSMISSION
      • 81-06-18 Clutch Housing Fills w/Mud/Dirt
      • 81-07-25 Clutch Shudder/Chatter In Reverse
      • 81-7-26 Missing Shims On SROD
      • 82-25-16(S) Upshift Indicator Light
      • 83-3-23 Axle Lubricant Drain And Refill
      • 83-23-17 8.8" Rear Axle Vent
      • 84-24-13 Transfer Case - Grinding/Block-Out
      • 90-16-07 High Clutch Effort
    • Driveability/Fuel/Ignition/Emissions >
      • 81-6-19 Cold Driveaway Performance Improvements
      • 81-6-20 Piston Slap During Cold Driveaway
      • 81-6-21 Power Valve Vacuum Hose
      • 83-11-12-S Stall/No Start/Hessitation
      • 88-05-14 Low Oil Pressure
      • 91-25-07 IAC Bypass
      • EMW Module
    • Noise/Vibration/Ride/Squeaks/Rattles >
      • 80-1-12-S REAR SPRING SQUEAK
    • Miscellaneous/General >
      • 83-14-1 UNDERHOOD PRODUCTION STAMP RELOCATION
    • Health/Safety/Environmental Hazard information
    • CALIBRATION: 4-53F-R00
    • Fuel Cross-Flow
  • Underhood
    • Cowl Seal
    • Engine Compartment Lamp
    • Fender Aprons
    • Speed Control
    • Tool Box
    • Vacuum Systems >
      • Vacuum Diagrams >
        • 300 Six
        • 302/5.0L
        • 351W
        • 351M/400
        • 460 V8
      • Vacuum Reservoirs
  • Metrics
  • About Me/Contact Me
    • Youth Classes >
      • Automotive Maintenance >
        • Fall of 2015
      • Building Web Sites >
        • Lesson 1
        • Lesson 2
        • Lesson 3
        • LTC
      • Overview of Paul's Life, Journeys, & Works >
        • Lesson 1
        • Lesson 2
    • Projects >
      • Engine Cradle
      • Gauge Pocket
      • Rear Bumper And Spare Tire Carrier
  • Year-To-Year Differences
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YOUR CART

300 SiX

1980 - 86 FORD TRUCKS
          
FASTENERS

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  • Illustrations
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  • Compression Thoughts
  • Carb Spacer
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These are the specification sheets from the light truck facts book which Ford gave the dealerships.

​This is the one from the 1980 book:
The one below is from the 1981 book:
These are the 1982 specifications:
These are the 1983 specifications:
These are the 1984 specifications:
These are the 1985 specifications:
The ones below are the 1986 specifications:
In considering the varying engine output ratings (see the Specifications tab) over the years and the vehicle weight ratings it seems like there are several things in play, including the carburetor, manifolds, cam, and compression ratio.

Toward the latter I've done some sleuthing: The connecting rods didn't change from 1980 through at least 1989, so the CR changes are elsewhere.

According to the 1994 version of the Master Parts Catalog there were four heads used, as shown below:
  1. One for all 1980 through 1984 trucks
  2. Another for light-duty 1985 & 86 trucks with Thermactor ports
  3. A third for heavy-duty 1985 & 86 ports w/o Thermactor ports
  4. One for all 1987 - 89 trucks​​
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WE SHOULD PROBABLY DISREGARD EVERYTHING IN RED, BELOW.  BUT I'M PRESERVING IT FOR THE MOMENT.....
So, what about pistons.  Here's what I can determine from the catalog, along with the compression ratios shown in the yearly dealer fact books, as shown on the Specifications tab.

Given the heads used and the changing pistons it is hard to tell exactly what caused the compression ratio changes, but I'll hazard these guesses:
  1. Since the same head was used on the trucks from 1980 through 1984 (from 1978 actually) we can see that the new piston used on the LD trucks in 1983 dropped the compression by 0.5:1
  2. However, I'm confused with the compression ratio of the HD trucks as the same pistons, rods, and heads were used from 1980 through 7/23/84.  And yet the 1983 and '84 compression ratios for the HD trucks supposedly increased by 0.4:1?
  3. A new LD head was introduced in 1985, but I don't see any pistons that were used then, so there's something missing in the catalog.  However, the head/piston combo supposedly raised the compression ration 0.1:1
  4. There was also a new HD head, w/o T/E ports, introduced in '85.  And this time there were pistons listed for the HD engines.  But the combination of the new head and pistons reduced the compression ration by another 0.5:1
Today (12/13/18) I climbed up to the microfiche tower and reviewed the 1990 version of the MPC on fiche.  And, there were some significant differences in both the piston and head areas.

On the piston info, I've added the info to the spreadsheet, and I've shown the changes in red.  Note that there's another piston (E4-L) that doesn't even show in the '94 MPC.  And, there was a lot of clarification regarding the other pistons.

And, the info on the heads was different as well.  I added it to the spreadsheet, as shown, but haven't gotten my head around it yet.
Ford used at least two types of spacers for the carburetors - with and without EGR.  The ones with EGR had a hole that allowed exhaust gas to enter the intake, and those w/o EGR had a tab that covered that hole.  Some people are looking for the non-EGR spacer, and there are two known sources, as shown below.  But if you find another please let me know so I can document it.
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Here you can see the tab covers the exhaust gas hole, a spacer w/o the hose barb'd vacuum fitting, and one with the vacuum fitting.