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 MANUALSFORD2004MUSTANG BASE, 2D COUPE, 3.9 6, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2061 (ENGINE MECHANICAL - 2.5L (HYBRID))SPECIFICATIONSGENERAL SPECIFICATIONS TABLE
2004 Ford Mustang Base, 2D Coupe, 3.9 6, Automatic
General Specifications Table
2004 Ford Mustang Base, 2D Coupe, 3.9 6, AutomaticSECTION General Specifications Table
WARNING: This page is about a different car, the 2010 Mercury Milan and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
GENERAL SPECIFICATIONS TABLE
| Item | Specification | ||
|---|---|---|---|
| Displacement | 2.5L | ||
| No. of cylinders | 4 | ||
| Bore/stroke | 89/100 | ||
| Firing order | 1-3-4-2 | ||
| Oil pressure (hot @ 2,000 rpm) | 29-39 psi 200-268 kPa |
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| Compression ratio | 12.5:1 | ||
| Engine weight (without accessory drive components) | 121.3 kg (267.5 lb) | ||
| Engine and transaxle weight (without accessory drive components) | 257.1 kg (567 lb) | ||
| Cylinder Block | |||
| Cylinder bore diameter | 89-89.3 mm (3.503-3.517 in) | ||
| Cylinder bore maximum out-of-round | 0.008 mm (0.0003 in) | ||
| Main bearing bore diameter | 57.018-57.040 mm (2.244-2.245 in) | ||
| Head gasket surface flatness | 0.1 mm/general 0.05 mm/200 x 200 (0.003 in/general) (0.0019 in/7.87 x 7.87) | ||
| Piston | |||
| Diameter (1) | 88.965-88.975 mm (3.5025-3.5026 in) | ||
| Diameter (2) | 88.975-88.985 mm (3.5026-3.5033 in) | ||
| Diameter (3) | 88.985-88.995 mm (3.5033-3.5037 in) | ||
| Piston-to-bore clearance | 0.025-0.045 mm (0.0009-0.0017 in) | ||
| Ring groove width - top | 1.203-1.205 mm (0.0473-0.0474 in) | ||
| Ring groove width - 2nd | 1.202-1.204 mm (0.0473-0.0474 in) | ||
| Ring groove width - oil | 2.501-2.503 mm (0.0984-0.0985 in) | ||
| Piston skirt coating thickness | 0.008-0.016 mm (0.0003-0.0006 in) | ||
| Piston Pin | |||
| Diameter | 19.995-20 mm (0.7872-0.7874 in) | ||
| Length | 54.7-55 mm (2.153-2.165 in) | ||
| Piston-to-pin clearance | Floating Pin | ||
| Pin-to-rod clearance | Clips | ||
| Cylinder Head | |||
| Cylinder head flatness | 0.08 mm (0.0031 in) maximum overall, a maximum of 0.05 mm (0.0019 in) within 150 mm (5.9 in) | ||
| Valve lift @ zero lash (exhaust) | 7.7 mm (0.30 in) | ||
| Valve lift @ zero lash (intake) | 8.8 mm (0.35 in) | ||
| Valve guide diameter | 5.509-5.539 mm (0.216-0.218 in) | ||
| Valve seat width - intake/exhaust | 0.99-1.84 mm (0.038-0.072 in) | ||
| Valve seat angle | 45 degrees | ||
| Valve seat runout | 0.075 mm (0.0029 in) | ||
| Valve lash adjuster bore diameter | 31.00-31.03 mm (1.220-1.221 in) | ||
| Cam bore diameter | 25.015-25.040 mm (0.984-0.985 in) | ||
| Valve | |||
| Valve head diameter - intake | 34.85-35.15 mm (1.372-1.383 in) | ||
| Valve head diameter - exhaust | 29.85-30.15 mm (1.175-1.187 in) | ||
| Valve stem diameter - intake | 5.470-5.485 mm (0.2153-0.2159 in) | ||
| Valve stem diameter - exhaust | 5.465-5.480 mm (0.2151-0.2157 in) | ||
| Valve stem-to-guide clearance - intake | 0.0027 mm (0.00010 in) | ||
| Valve stem-to-guide clearance - exhaust | 0.0029 mm (0.00011 in) | ||
| Valve face runout (maximum) | 0.075 mm (0.0029 in) | ||
| Valve face angle | 45 degrees | ||
| Valve Spring - Compression Pressure | |||
| Intake and exhaust (installed) | 38.667 lb | ||
| Intake (valve open) 8.9 mm (0.35 in) of lift | 97.032 lb | ||
| Exhaust (valve open) 7.4 mm of lift | 93.338 lb | ||
| Free length | 44.92 mm (1.768 in) | ||
| Assembled height | 37.9 mm (1.492 in) | ||
| Crankshaft | |||
| Main bearing journal diameter | 51.978-52.002 mm (2.046-2.047 in) | ||
| Production repair | 51.730-51.750 mm (2.036-2.037 in) | ||
| Main bearing clearance | 0.016-0.047 mm (0.0006-0.0015 in) | ||
| Connecting rod journal diameter | 51.978-52.002 mm (2.0463-2.0473 in) | ||
| Production repair | 51.730-51.750 mm (2.0366-2.0374 in) | ||
| End play | 0.22-0.43 mm (0.008-0.016 in) | ||
| Rings | |||
| Width - top | 1.17-1.185 mm (0.0460-0.0466 in) | ||
| Width - 2nd | 1.197-1.199 mm (0.0471-0.0472 in) | ||
| Width - oil | 2.38-2.45 mm (0.093-0.096 in) | ||
| Ring gap (in bore) - top | 0.16-0.26 mm (0.006-0.010 in) | ||
| Ring gap (in bore) - 2nd | 0.31-0.46 mm (0.012-0.018 in) | ||
| Ring gap (in bore) - oil | 0.2-0.7 mm (0.007-0.027 in) | ||
| Valve Tappet | |||
| Diameter | 30.97-30.98 mm (1.2192-1.2196 in) | ||
| Tappet-to-valve clearance - intake | 0.22-0.28 mm (0.008-0.011 in) | ||
| Tappet-to-valve clearance - exhaust | 0.27-0.33 mm (0.010-0.013 in) | ||
| Tappet-to-bore clearance | 0.02-0.06 mm (0.0007-0.0023 in) | ||
| Camshaft | |||
| Lobe lift - intake | 8.24999 mm (0.324 in) | ||
| Lobe lift - exhaust | 7.80007 mm (0.307 in) | ||
| Runout (1)(1) | 0.03 mm (0.001 in) | ||
| Thrust clearance | 0.09-0.24 mm (0.003-0.009 in) | ||
| Journal diameter | 24.96-24.98 mm (0.982-0.983 in) | ||
| Journal-to-bore clearance | 0.035-0.080 mm (0.001-0.003 in) | ||
| Connecting Rod | |||
| Bearing clearance | 0.027-0.052 mm (0.001-0.002 in) | ||
| Bearing thickness | 1.496-1.520 mm (0.058-0.059 in) | ||
| Crank bore diameter | 55.023-55.047 mm (2.166-2.167 in) | ||
| Pin bore diameter | 20.965-20.985 mm (0.825-0.826 in) | ||
| Length (center to center) | 151.8 mm (5.976 in) | ||
| Side clearance | 1.95-3.05 mm (0.076-0.120 in) | ||
| Axial clearance | 0.14-0.36 mm (0.005-0.014 in) | ||
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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.