General
| General Specifications | Displacement L (CID) | 281 | |
| Number of cylinders | 8 | ||
| Bore and stroke | 90.2X90.0 | ||
| Firing order | 1-3-7-2-6-5-4-8 | ||
| Oil pressure (Hot @ 1500 rpm) kpa | 138-310 | ||
| Drive belt tension | See Note Newly installed-Refers to the condition of the NEW drive belt before the engine has made no more than one rotation and before the belt has had a chance to stretch or seat into the pulley grooves. | ||
| Cylinder Head and Valve train head gasket surface - WT = 10.0/2.5. Head gasket surface finish-RZU - 13.5 microns. Filter cut off at 0.08 mm, TPI (@) 3.5 microns below the peak 63% min. cutoff at 0.8 rum, 0 Ref=2V. | Combustion chamber volume | 52 +/-.5 c | |
| Valve seats width-intake | 0.075-0.083 inch | ||
| Valve seats width-exhaust mm (inch) | 0.075-0.083 inch | ||
| Valve seats angle | 44.51-45.01° | ||
| Valve seats runout (T.I.R.) max mm (inch) | 0.0010 | ||
| Valve arrangement (front-to-rear) | Left Hand | E-I-E-I-E-I-E-I | |
| Right Hand | I-E-I-E-I-E-I-E | ||
| Valve stem to guide clearance-intake | 0.00079-0.00272 inch | ||
| Valve stem to guide clearance-exhaust | 0.0018-0.0037 inch | ||
| Valve head diameter-intake | 1.75 inch | ||
| Valve head diameter-exhaust | 1.34 inch | ||
| Valve head diameter-gauge diameters | 1.67 and 1.26 inch | ||
| Valve face runout limit | 0.002 inch | ||
| Valve face angle | 45.25-45.75° | ||
| Valve stem diameter (Std) -Intake | 0.275-0.2746 inch | ||
| Valve stem diameter (Std) -exhaust | 0.274-0.2736 inch | ||
| Valve springs- compression pressure N @ spec- length-intake | 1.10 inch | ||
| Valve springs-compression pressure N @ spec. length-exhaust | 1.10 inch | ||
| Valve springs-free length (approximate) intake | 1.951 inch | ||
| Valve springs--free length (approximate) exhaust mm | 1.951 | ||
| Valve springs-installed pressure N @ spec. length -intake | 1.57 inch | ||
| Valve springs installed 244.64 N pressure N @ spec. length-exhaust | 1.57 inch | ||
| Valve springs-installed 10 % pressure pressure N @ spec. length less -service limit | 1.10 inch | ||
| Valve springs-installed pressure N @ spec. length-out of square limit | 2° | ||
| Valve guide inner diameter | 0.00079-0.03740 | ||
| Rocker arm-ratio | 1.75:1 | ||
| Valve tappet-diameter (Std) | 0.66-0.629 inch | ||
| Valve tappet-clearance to bore | 0.00071-0.00272 inch | ||
| Valve tappet--service limit | 0.00063 inch | ||
| Valve tappet-hydraulic leakdown rate | 5-25 seconds | ||
| Valve tappet--collapsed valve tappet gap desired | 0.0335-0.0177 inch | ||
| Camshaft | Lobe lift-intake | 0.2594 inch | |
| Lobe lift-exhaust | 0.2594 inch | ||
| Lobe lift-allowable lobe lift loss | 0 | ||
| Theoretical valve lift @ zero lash-intake | 0.472 inch | ||
| Theoretical valve lift @ zero lash--exhaust | 0.472 inch | ||
| End play mm (inch) | 0.00098-0.0065 inch | ||
| Journal to bearing clearance | 0.008-0.003 inch | ||
| Journal to bearing clearance-service limit | 0.0048 inch | ||
| Journal diameter (all) | 1.061-1.060 inch | ||
| Journal diameter (all)-bearing inside diameter (all) | 1.063-1.0625 inch | ||
| Camshaft runout | 0.002 inch | ||
| Cylinder Bore | Diameter-surface finish (RMS) | 0.2-0.6 microns | |
| Diameter-out-of-round limit | 0.0006 inch | ||
| Diameter-out-of-round service limit | 0.00079 inch | ||
| Diameter--taper service limit | 0.00023 inch | ||
| Piston | Piston-diameter-coded Red 1 | 3.550-3.551 inch | |
| Piston-diameter-coded Blue 2 | 3.5507-3.5515 inch | ||
| Piston-diameter-coded Yellow 3 | 3.513-3.5521 inch | ||
| Piston-to-bore-clearance | 0.0005-0.001 inch | ||
| Pin bore diameter | 0.866-0.8663 inch | ||
| Ring groove width-compression (top) | 0.06-0.610 inch | ||
| Ring groove width-compression (bottom) | 0.060-0.0602 inch | ||
| Ring groove width-oil ring | 0.275-0.2844 inch | ||
| Piston pin-length | 2.44-2.443 inch | ||
| Diameter | 0.866-0.8661 inch | ||
| Pin to piston clearance | 0.0002-0.0004 inch | ||
| Pin to rod clearance | 0.0006-0.00157 inch | ||
| Piston rings-ring gap -compression (top) | 0.0394 inch | ||
| Piston rings-ring gap -compression (top) | 0.0394 inch | ||
| Oil ring-side clearance | 0.05 inch | ||
| Oil ring-compression (top) | 0.0016-0.0031 inch | ||
| Oil ring-compression (top) | 0.0012-0.00031 inch | ||
| Oil ring | snug fit | ||
| Oil ring-service limit | 0.0006 inch | ||
| Ring gap-compression (top) | 0.01-0.02 inch | ||
| Ring gap-compression (bottom) | 0.01-0.02 inch | ||
| Ring gap--oil ring (steel rail) | 0.006-0.026 inch | ||
| Cylinder Block | Head gasket surface | See Note head gasket surface - WT= 10.0/2.5. Head gasket surface finish-RZU - 13.5 microns. Filter cut off at 0.08 mm, TPI (@) 3.5 microns below the peak 63% min. cutoff at 0.8 rum, 0 Ref=2V. | |
| Head gasket surface finish | See Note head gasket surface - WT= 10.0/2.5. Head gasket surface finish-RZU - 13.5 microns. Filter cut off at 0.08 mm, TPI (@) 3.5 microns below the peak 63% min. cutoff at 0.8 rum, 0 Ref=2V. | ||
| Main bearing bore diameter | 2.85-2.851 inch | ||
| Crankshaft and Flywheel | Main bearing journal diameter | 2.65-2.657 inch | |
| Connecting rod journal-diameter | 2.0861-2.0867 inch | ||
| Crankshaft free end play | 0.0051-0.012 inch | ||
| Crankshaft runout to rear face of block | 0.002 inch | ||
| Connecting Rod Bearings | Clearance to crankshaft-desired | 0.001-0.0027 inch | |
| Clearance to crankshaft-allowable | 0.001-0.0027 inch | ||
| Bearing wall thickness (Std) | 0.096-0.0965 inch | ||
| Main Bearings | Clearance to crankshaft-desired | 0.0011-0.0026 inch | |
| Clearance to crankshaft-allowable | 0.0011-0.0026 inch | ||
| Bearing wall thickness (Std) | 0.075-0.076 inch | ||
| Connecting Rod, Piston and Rings | Connecting rod--piston pin bore diameter | 0.864-0.865 inch | |
| Connecting rod-crankshaft bearing bore diameter | 2.234-2.24 inch | ||
| Connecting rod-length (center-to-center) | 5.93 inch | ||
| Alignment (bore-to-bore Max. Diff.) -Twist The pin bore and crank bearing bore must be parallel and in the same vertical plane within the specified total difference when measured at the ends of a 203 mm bar, 105.5 mm on each side of rod centerline. | 0.0015-0.984 inch | ||
| Alignment (bore-to-bore Max. Diff.) bend | 0.0015-0.984 inch | ||
| Side clearance (assembled to cranky-standard | 0 0.0006-0.0177 inch | ||
| Side clearance (assembled to cranky-service limit | 0.02 inch | ||
| Crankshaft main bearing journal taper | 0.0007 inch | ||
| Crankshaft main bearing journal runout | 0.002 inch | ||
| Crankshaft connecting rod journal taper | 0.0005 inch |