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 SPECIFICATIONSENGINESYSTEM SPECIFICATIONSTORQUE SPECIFICATIONS
1991 Ford Ranger 4WD V6-245 4.0L
Torque Specifications
1991 Ford Ranger 4WD V6-245 4.0LSECTION Torque Specifications
| Oil Filter Adapter - Through Bolt | 35-40 Newton Meter (Nm) |
| Water Pump to Front Cover - Bolts | 8.5-12 Newton Meter (Nm) |
| Cylinder Front Cover - Bolts | 17-21 Newton Meter (Nm) |
| Timing Chain Guide - Bolts | 10-12 Newton Meter (Nm) |
| Timing Chain Tensioner - Bolts | 9-11 Newton Meter (Nm) |
| Camshaft Sprocker - Bolt | 60-68 Newton Meter (Nm) |
| Rocker Arm Stand - Bolts | 62-70 Newton Meter (Nm) |
| Rocker Arm Cover - Bolts | 4-7 Newton Meter (Nm) |
| E-DIS Coil Bracket to Engine - Bolts | 26-32 Newton Meter (Nm) |
| Upper Intake Manifold - Nuts | 20-25 Newton Meter (Nm) |
| Camshaft Thrust Plate - Screws | 9-13 Newton Meter (Nm) |
| Oil Pump Drive Assembly Hold Down - Bolt | 17-21 Newton Meter (Nm) |
| Thermostat Housing - Bolts | 9-13 Newton Meter (Nm) |
| Oil Pressure Switch | 18-22 Newton Meter (Nm) |
| Coolant Temperature Sensor | 12-18 Newton Meter (Nm) |
| Coolant Temperature Sender | 4.5-7 Newton Meter (Nm) |
| Oil Pan - Bolts and Nuts | 7-10 Newton Meter (Nm) |
| Oil Pump Pick-Up To Pump-Screws | 9-13 Newton Meter (Nm) |
| Oil Pump to Engine Block - Screws | 17-21 Newton Meter (Nm) |
| Connecting Rod Bearing Cap - Nuts | 25-32 Newton Meter (Nm) |
| Crankshaft Main Bearing Cap - Bolts | 90-104 Newton Meter (Nm) |
| Crankshaft Oil Baffle - Nuts | 17-21 Newton Meter (Nm) |
| Cylinder Head - Bolts | - Tighten the cylinder head bolts in sequence in three steps: Step 1: 30 Nm (22 ft-lb). Step 2: 70 Nm (52 ft lb). Step 3: Rotate the cylinder head bolts an additional 90 degrees tighter in sequence. |
| Lower Intake Manifold - Nuts and Bolts | - Tighten the intake manifold in sequence in four steps: Step 1: 4-8 Nm (3-6 ft-lbs). Step 2: 8-15 Nm (6-11 ft-lbs). Step 3: 15-21 Nm (11-15 ft-lbs). Step 4: 21-25 Nm (15-18 ft-lbs). |
RENDER: 1.0x
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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.