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.
2006 Lincoln LSFACTORY OEM SERVICE PROCEDURE
General Specifications
GENERAL SPECIFICATIONS
| Item | Specification |
|---|---|
| Lubricants and Sealants | |
| Motorcraft SAE 5W-20 Premium Synthetic Blend Motor Oil XO-5W20-QSP (in Canada Motorcraft SAE 5W-20 Super Premium Motor Oil CXO-5W20-LSP12) or equivalent | WSS-M2C930-A |
| Motorcraft Metal Surface Cleaner ZC-21 | WSE-M5B392-A |
| Silicone Gasket Remover ZC-30 | - |
| Motorcraft Metal Surface Prep ZC-31 | - |
| Silicone Gasket and Sealant TA-30 | WSE-M4G323-A4 |
| Engine | |
| Displacement | 3.9L (238 CID) |
| Number of cylinders | 8 |
| Bore | 86 mm (3.386 in) |
| Stroke | 85 mm (3.346 in) |
| Firing order | 1-5-4-2-6-3-7-8 |
| Oil pressure minimum at 400 RPM (engine at normal operating temperature) | 413-482 kPa (61-73 psi) |
| Engine oil capacity (with filter change) | 6.5 liters (6.9 quarts) |
| Cylinder Head and Valve Train | |
| Cylinder head gasket surface flatness | 0.08 mm (0.003 in) total |
| Combustion chamber volume | 48.73 ± 2.068-2.018 cc |
| Valve stem diameter - intake | 4.9763-4.978 mm (0.196-0.197 in) |
| Valve stem diameter - exhaust | 4.955-4.970 mm (0.195-0.196 in) |
| Valve stem-to-guide clearance - intake | 0.022 mm (0.001 in) |
| Valve stem-to-guide clearance - exhaust | 0.030 mm (0.001 in) |
| Valve head diameter - intake | 34.9 mm (1.728 in) |
| Valve head diameter - exhaust | 30.9 mm (1.216 in) |
| Valve face runout | 0.04 mm (0.002 in) |
| Valve face angle | 45 degrees |
| Valve seat width - intake | 1 mm (0.0393 in) |
| Valve seat width - exhaust | 2 mm (0.0787 in) |
| Valve seat angle - intake | 14 degrees |
| Valve seat angle - exhaust | 13 degrees |
| Camshaft | |
| Lobe lift - intake | 9 mm (0.354 in) |
| Lobe lift - exhaust | 8.4 mm (0.330 in) |
| End play | 0.100-0.125 mm (0.0003-0.007 in) |
| Accessory Drive Belt | |
| Drive belt | 6 ribs |
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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