1981 Mustang – Tune Up Information

1981 Ford Mustang Tune-up Information

Maintenance Schedule

Maintenance interval
7,500
15,00
22,500
30,000
37,500
45,000
52,500
60,000
Change engine oil & filter every 6 month or mileage
x
x
x
x
x
x
x
x
Replace spark plugs
x
x
Change crankcase Emission filter
x
x
Inspect accessory drive belts
x
x
Replace PCV valve
x
x
x
x
Change engine coolant at 6 months or at mileage
x
x
Replace air cleaner filter
x
x
Check belat, hoses & clamps
x
x
check exhaust heat shields
x
x
Lub steering and suspension
x
x
x
x
Inspect breaking system
x
x
Inspect & replace front wheel bearings
x
x

 

Year Engine Spark Plugs Distributor Timingº Intake Valve opens Fuel pump press Idle speed
Cyl
cid
rotation Type Gap Dwell Gap Man A/T Man A/t
1981 140 CW AWSF 42 .034 * * 6B 20 (12)B 5.0-7.0 850 750
140T CW AWSF 42 .034 * * 6B NA 5.5-6.5 900 800 (600)
6-200 CW BSF 92 .050 * * 10B 10B 5.5-6.5 700 550
8-255 CCW ASF 52 .050 * * 8B 8B 5.5-6.5 NA 550

* Not applicable, solid state ignition

*** All timing marks on this chart are Before Top Dead Center (BTDC)

Always use the engine compartment sticker if it disagrees with this or any chart.

  1. At 750 RPM
  2. At 650 RPM
  3. Lowest reading within 75% of highest
  4. At 550 RPM
  5. At 850 RPM
  6. At 700 RPM
  7. At 500 RPM
  8. Refer to engine compartment sticker
  9. 9 Degrees before top dead center

Lubricant capacities
Engines – Quarts less oil filter
2.8L 140ci 1981 4 or 4.5 if turbo
3.8L 232 ci 1981 4
4.2L 255ci ci 1981 4
Manual transmissions in pints
2.8L 140ci 1981 2.8 or 3.5 if turbo
3.8L 232 ci 1981 4.5
4.2L 255ci ci 1981 5.6
Automatic transmissions, in quarts
2.8L 140ci 1981 C3=16 pints, C4=13.5 pints
3.8L 232 ci 1981 C3=16 pints, C5=22 pints
4.2L 255ci ci 1981 19
Differential – Maintain to filler hole.
6.75″ 1981 2.5 pints in conventional
7.5″ 1981 3.5 pints
Fuel tank capacity is 12.5 gallons all models
Cooling system capacity
2.8L 140ci 1981 8.6 or if equipped with A/C is 9.0, turbo is 9.2
3.8L 232 ci 1981 8.1 quarts
4.2L 255ci ci 1981 13.4 or if equipped with A/C is 13.7 quarts
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