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 MANUALSFORD1991RANGER 2WD L4-140 2.3L SOHCREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER BLOCK ASSEMBLYCONNECTING ROD, ENGINEREBUILD SPECIFICATIONS
1991 Ford Ranger 2WD L4-140 2.3L SOHC
Rebuild Specifications
1991 Ford Ranger 2WD L4-140 2.3L SOHCSECTION Rebuild Specifications
Connecting Rod Journal Diameter 2.0462-2.0472 inch
Connecting Rod Journal Out-of-Round Limit 0.0006 inch (Max)
Connecting Rod Journal Taper Limit 0.0006 Per Inch (Max)
Connecting Rod Journal Surface Finish (RMS) 12 (Max)
Connecting Rod Bearings Clearance to Crankshaft - Desired 0.0008-0.0015 inch
Connecting Rod Bearings Clearance to Crankshaft - Allowable 0.0008-0.0026 inch
Connecting Rod Bearing Wall Thickness (Standard) 0.0619-0.0624 inch
If 0.002 Undersize, Add 0.001 to Standard Thickness.
Connecting Rod
Piston Pin Bore Diameter 23.104-23.145 mm (0.9096-0.9112 in.)
Crankshaft Bearing Bore Diameter 55.170-55.190 mm (2.1720-2.1728 in.)
Crankshaft Bearing Bore Out-of-Round Limit 0.0004 inch
Crankshaft Bearing Bore Taper Limit 0.0004 inch
Length (Center-to-Center) 5.2031-5.2063 inch
Connecting Rod Alignment (Bore to Bore (Max) Difference)
Twist 0.024 inch
Bend 0.012 inch
Connecting Rod Side Clearance (Assembled to Crankshaft)
Standard 0.0035-0.0105 inch
Service Limit 0.014 inch
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:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.