Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1991AEROSTAR 2WD V6-183 3.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSSPECIFICATIONSMECHANICAL SPECIFICATIONS
1991 Ford Aerostar 2WD V6-183 3.0L
Mechanical Specifications
1991 Ford Aerostar 2WD V6-183 3.0LSECTION Mechanical Specifications
POWER STEERING - Tension Code B
New Belt (0 minutes Operation) 100-140 lbs. (444-662 N)
Used Belt Tension (10+ minutes Operation) 80-100 lbs. (355-444 N)
Allowable Minimum Tension 60 lbs. (266 N)
ALTERNATOR W/O AIR-CONDITIONING - Tension Code C
New Belt (0 minutes Operation) 120-160 lbs. (533-711 N)
Used Belt Tension (10+ minutes Operation) 110-130 lbs. (489-578 N)
Allowable Minimum Tension 70 lbs. (311 N)
ALTERNATOR W/ AIR-CONDITIONING - Tension Code D
New Belt (0 minutes Operation) 150-190 lbs. (667-845 N)
Used Belt Tension (10+ minutes Operation) 140-160 lbs. (622-711 N)
Allowable Minimum Tension 90 lbs. (400 N)
REMARKS:
[1] Tension codes refer to the different tensions of individual belts.
TORQUE VALUES
Air Bypass Valve to Throttle Body 6-8.5 lb.ft. (8-11.5 Nm)
Air Supply Tube Clamps 15-23 lb. in. (1.7-2.6 Nm)
Alternator Adjustment Bolt 23-34 lb.ft. (33-46 Nm)
Alternator Pivot Bolt 45-57 lb.ft. (61-77 Nm)
Idler Pulley Pivot Bolt 30-40 lb.ft. (40-55 Nm)
Idler Pulley Adjusting Bolt 30-40 lb.ft. (40-55 Nm)
Canister Mounting Bracket Bolts 6-9 lb.ft. (8-12 Nm)
Charcoal Canister Retaining Bolts 4-6 lb.ft. (4-6 Nm)
Converter Pipe to Muffler/Outlet Pipe Assembly 28-31 lb.ft. (37-42 Nm)
Exhaust Manifold to Cylinder Head 20-30 lb.ft. (27-41 Nm)
Inlet Pipe to Exhaust Manifold 25-34 lb.ft. (34-46 Nm)
Oxygen Sensor 30-35 lb.ft. (40-50 Nm)
Throttle Body to Upper Intake Manifold 6-10 lb.ft. (8-12 Nm)
Y-pipe to converter pipe 28-31 lb.ft. (37-42 Nm)
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.