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 4WD V6-245 4.0LREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER BLOCK ASSEMBLYCONNECTING ROD, ENGINEGENERAL SPECIFICATIONS
1991 Ford Ranger 4WD V6-245 4.0L
General Specifications
1991 Ford Ranger 4WD V6-245 4.0LSECTION General Specifications
Connecting Rod Pin Bore Diameter 0.9432-0.9439
Connecting Rod Crankshaft Bearing Bore Diameter 2.2370-2.2378
Connecting Rod Crankshaft Bearing Bore Out-Of-Round 0.0004
Connecting Rod Crankshaft Bearing Bore Taper 0.0004
Connecting Rod Length (Center-To-Center) 5.1386-5.1413
Connecting Rod Alignment (Bore-To-Bore Max. Diff.), (Pin and crank bearing bore must be parallel and in same vertical plane within the specified total difference when measured at ends of an 8" bar, 4" on each side of rod centerline.)
Twist 0.006
Bend 0.002
Connecting Rod Side Clearance (Assembled To Crank)
Standard 0.0002-0.0025
Service Limit 0.014
Connecting Rod Crankshaft Bearing Bore Diameter 2.2370-2.2378
Connecting Rod Crankshaft Bearing Bore Out-Of-Round 0.0004
Connecting Rod Crankshaft Bearing Bore Taper 0.0004
Connecting Rod Length (Center-To-Center) 5.1386-5.1413
Connecting Rod Alignment (Bore-To-Bore Max. Diff.), (Pin and crank bearing bore must be parallel and in same vertical plane within the specified total difference when measured at ends of an 8" bar, 4" on each side of rod centerline.)
Twist 0.006
Bend 0.002
Connecting Rod Side Clearance (Assembled To Crank)
Standard 0.0002-0.0025
Service Limit 0.014
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.