General Specifications
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GENERAL SPECIFICATIONS
| Item | Specification |
|---|---|
| Lubricants and Sealants | |
| Motorcraft Metal Surface Prep ZC-31 | - |
| Motorcraft SAE 5W-20 Premium Synthetic Blend Motor Oil XO-5W20-QSP (US); Motorcraft SAE 5W-20 Super Premium Motor Oil CXO-5W20-LSP12 (Canada); or equivalent | WSS-M2C930-A |
| Motorcraft Premium Gold Engine Coolant with Bittering Agent (US only) VC-7-B (US); CVC-7-A (Canada) or equivalent (yellow color) | WSS-M97B51-A1 |
| Silicone Brake Caliper Grease and Dielectric Compound XG-3-A | ESE-M1C171-A |
| Silicone Gasket and Sealant TA-30 | WSE-M4G323-A4 |
| Silicone Gasket Remover ZC-30 | - |
| Thread Sealant with PTFE TA-24 | WSK-M2G350-A2 |
| Threadlock 262 TA-26 | WSK-M26351-A6 |
| Engine | |
| Displacement | 4.2L |
| Number of cylinders | 6 |
| Bore | 96.8325 mm (3.81 in) |
| Stroke | 95.0 mm (3.74 in) |
| Firing order | 1-4-2-5-3-6 |
| Oil pressure (HOT 2,500 rpm) | 275.8-861.9 kPa (40-125 psi) |
| Oil capacity | 5.21L (5.5 quarts) + 0.47L (1/2 quart) with filter change, 5.68L (6.0 quarts) total |
| Compression ratio | - |
| Cylinder Head and Valve Train | |
| Cylinder head gasket surface flatness | 0.18 mm (0.007 in) |
| Cylinder head gasket surface finisha | - |
| Combustion chamber volume | 61.5-64.5 cc (3.75-3.94 cu in) |
| Valve arrangement (front to rear) | - |
| Valve guide bore diameter | 7.015-7.044 mm (0.276-0.277 in) |
| Valve stem diameter - intake (standard) | 6.955-6.988 mm (0.2738-0.2751 in) |
| Valve stem diameter - exhaust | 6.929-6.962 mm (0.2728-0.2741 in) |
| Valve stem diameter - oversize (intake) | 9.075-9.055 mm (0.3573-0.3565 in) |
| Valve stem diameter - oversize (exhaust) | 9.063-9.043 mm (0.3568-0.3560 in) |
| Valve stem diameter - oversize (intake) | 9.456-9.436 mm (0.3723-0.3715 in) |
| Valve stem diameter - oversize (exhaust) | 9.444-9.424 mm (0.3718-0.3710 in) |
| Valve stem-to-guide clearance - intake | 0.020-0.069 mm (0.0008-0.0027 in) |
| Valve stem-to-guide clearance - exhaust | 0.038-0.083 mm (0.0015-0.0033 in) |
| Valve head diameter - intake | 47.27 mm (1.86 in) |
| Valve head diameter - exhaust | 37.1 mm (1.46 in) |
| Valve face runout | 0.05 mm (0.002 in) |
| Valve face angle | 45.675 degrees |
| Valve seat width | 1.5-2.0 mm (0.06-0.08 in) |
| Valve seat runout (TIR) | 0.076 mm (0.003 in) |
| Valve seat angle | 44.75 degrees |
| Valve spring free length | - |
| Valve spring squareness | - |
| Valve spring compression pressure - valve open (without damper) | 1000 N (225 lbs) @ 29.2 mm (1.15 in) |
| Valve spring compression pressure - valve closed (without damper) | 350 N (79 lbs) @ 40.7 mm (1.61 in) |
| Valve spring installed height | 40.7 mm (1.61 in) |
| Valve spring installed pressure | - |
| Rocker arm ratio | 1.73 : 1 |
| Hydraulic Lash Adjuster | |
| Diameter (standard) | 22.195-22.212 mm (0.8738-0.8745 in) |
| Clearance to bore | 0.018-0.068 mm (0.0007-0.0027 in) |
| Service limit | 0.127 mm (0.005 in) |
| Hydraulic leakdown rateb | - |
| Collapsed lash adjuster gap - intake | 2.25-4.79 mm (0.089-0.189 in) |
| Collapsed lash adjuster gap - exhaust | 2.25-4.79 mm (0.089-0.189 in) |
| Camshaft | |
| Theoretical valve lift @ 0 lash - intake | 11.30 mm (0.45 in) |
| Theoretical valve lift @ 0 lash - exhaust | 11.47 mm (0.45 in) |
| Lobe lift - intake | 6.22 mm (0.24 in) |
| Lobe lift - exhaust | 6.57 mm (0.26 in) |
| Allowable lobe lift loss | 0.127 mm (0.005 in) |
| Journal diameter | 52.082-52.108 mm (2.0505-2.0515 in) |
| Camshaft journal bore inside diameter - intake | 47.097 mm (1.8542 in) max, 47.072 mm (1.8532 in) min |
| Camshaft journal bore inside diameter - exhaust | 39.739 mm (1.5645 in) max, 39.714 mm (1.5635 in) min |
| Camshaft journal-to-bearing clearance | 0.025-0.076 mm (0.001-0.003 in) |
| Runout | 0.05 mm (0.002 in) runout of No. 2 or No. 3 relative to No. 1 and No. 4 |
| End play | 0.025-0.150 mm (0.001-0.006 in) |
| Cylinder Block | |
| Cylinder bore diameter | 96.813 mm (3.81 in) |
| Cylinder bore maximum taper | 0.050 mm (0.002 in) |
| Cylinder bore maximum out-of-round - limit | 0.025 mm (0.001 in) |
| Cylinder bore maximum out-of-round - service limit | 0.050 mm (0.002 in) |
| Main bearing bore inside diameter | 68.905-68.885 mm (2.713-2.712 in) |
| Camshaft bearing bore inside diameter - No. 1 | 55.689-55.664 mm (2.192-2.191 in) |
| Camshaft bearing bore inside diameter - No. 2 and No. 3 | 55.308-55.283 mm (2.177-2.176 in) |
| Camshaft bearing bore inside diameter - No. 4 | 55.684-55.664 mm (2.192-2.191 in) |
| Head gasket surface flatness | 0.08 mm (0.003 in) in 152.0 mm (6.00 in) |
| Head gasket surface finish (RMS) | 2.0 @ 0.85.5 @ 2.5 |
| Crankshaft | |
| Main bearing journal diameter - 1, 2, 3 | 63.983-64.003 mm (2.5190-2.5198 in) |
| Main bearing journal maximum taper | 0.008 mm (0.0003 in) per 25 mm (1 in) |
| Main bearing journal maximum out-of-round | 0.008 mm (0.0003 in) max in 45 degrees, 0.015 mm (0.0006 in) total |
| Main bearing journal-to-cylinder block clearance - desired | 0.025-0.035 mm (0.001-0.0014 in) |
| Main bearing journal-to-cylinder block clearance - allowable | 0.013-0.058 mm (0.0005-0.0023 in) |
| Connecting rod journal diameter | - |
| Connecting rod journal maximum taper | - |
| Connecting rod journal maximum out-of-round | - |
| Crankshaft maximum end play | 0.10-0.20 mm (0.004-0.008 in) |
| Thrust bearing journal diameter | 58.682-58.702 mm (2.3103-2.3111 in) |
| Thrust bearing journal maximum out-of-round | 0.008 mm (0.0003 in) max in 45 degrees, 0.015 mm (0.0006 in) total |
| Thrust bearing journal maximum taper - limit | 0.008 mm per 25 mm (0.0003 in per inch) |
| Thrust bearing journal maximum taper - service limit | 0.3 microns (11.8 micro in) |
| Thrust bearing journal length | 29.725-29.775 mm (1.703-1.722 in) |
| Piston and Connecting Rod | |
| Piston diameter - coded red | 96.795-96.782 mm (3.8108-3.8103 in) |
| Piston diameter - coded blue | 96.808-96.795 mm (3.8113-3.8108 in) |
| Piston diameter - coded yellow | 96.821-96.808 mm (3.8119-3.8113 in) |
| Piston-to-cylinder bore clearance (uncoated clearance) | 0.018-0.044 mm (0.0007-0.0017 in) |
| Piston ring end gap - compression (top, in gauge) | 0.17-0.33 mm (0.0067-0.0130 in) |
| Piston ring end gap - compression (bottom, in gauge) | 0.3-0.55 mm (0.0118-0.0217 in) |
| Piston ring end gap - oil ring (steel rail, in gauge) | 0.15-0.65 mm (0.006-0.026 in) |
| Piston ring groove width - compression (top and bottom) | 1.54-1.52 mm (0.0606-0.0598 in) |
| Piston ring groove width - oil | 3.05-3.03 mm (0.1201-0.1193 in) |
| Piston ring width - compression (top and bottom) | 1.460-1.490 mm (0.0575-0.0587 in) |
| Piston ring width - oil ring | Side seal, snug fit |
| Piston ring-to-groove clearance - 1st ring | 0.030-0.080 mm (0.0012-0.0032 in) |
| Piston ring-to-groove clearance - 2nd ring | 0.030-0.080 mm (0.0012-0.0032 in) |
| Piston pin bore diameter | 23.014-23.018 mm (0.9061-0.9062 in) |
| Piston pin diameter | 23.000-23.003 mm (0.9055-0.9056 in) |
| Piston pin length | 63.55-63.05 mm (2.5020-2.4823 in) |
| Piston pin-to-piston fit | 0.011-0.018 mm (0.0004-0.0007 in) |
| Piston-to-connecting rod clearance | Press fit 8 kilonewtons (1,800 lbs) |
| Connecting rod-to-pin clearance | - |
| Connecting rod pin bore diameter | 22.94-22.98 mm (0.9032-0.9047 in) |
| Connecting rod length (center-to-center) | 154.66-154.74 mm (6.0890-6.0921 in) |
| Connecting rod maximum allowable bend | 0.04 per 25 mm (0.0016 in per inch) |
| Connecting rod maximum allowable twist | 0.059 per 25 mm (0.002 in per inch) |
| Connecting rod bearing bore diameter | 61.635-61.655 mm (2.4266-2.4274 in) |
| Connecting rod bearing-to-crankshaft clearance - desired | 0.025-0.035 mm (0.001-0.0014 in) |
| Connecting rod bearing-to-crankshaft clearance - allowable | 0.022-0.069 mm (0.0009-0.0027 in) |
| Connecting rod side clearance (assembled to crank) - standard | 0.11-0.49 mm (0.0043-0.0193 in) |
| Connecting rod side clearance (assembled to crank) - service limit | 0.36 mm (0.014 in) max. |
| Balance Shaft | |
| Journal diameter | 52.108-52.082 mm (2.0515-2.0505 in) |
| Bore inside diameter | 55.689-55.664 mm (2.192-2.191 in) |
| Maximum runout | 0.025 mm (0.001 in) |
| End play | 0.075-0.200 mm (0.003-0.008 in) |
a Head gasket surface - WT = 12/2.5. Head gasket surface finish - RZU-13.5 micron. Filter cut off at 0.08 min TPI @ 3.5 microns below the peak 63% min. Cut off at 0.08 mm (0.031496 in), O Ref = 2V.
b 20-200 seconds to leakdown 3.18 mm (0.125 in) with 225 N (50.6 lbs) load and tappet filled with leak-down fluid.