Jeep Engines - Oljeep

370 MOPAR PERFORMANCE PARTS1999,4.7L ENGINE SPECIFICATIONSNote: The following information has been reprinted from the 1999 Jeep Grand Cherokee Service Manual.DESCRIPTIONSPECIFICATIONGeneral SpecificationType. ................ 90" SOHC V-8 16-ValveDisplacement .............. 4.7 Liters 4701 cc(287 Cubic Inches)Bore & Stroke ............ 93.0 mm x 86.5 nun'(3.66 in. x 3.40 in.)1Compression Ratio ....................9.0:Lead Cylinder .................#1 Left Bank:Finhg Order .................. 1,8,4,3,6,5,7,2'Cylinder Block ..................... Cast IronCylinder Head ..................... Aluminum'Cylinder BlockCylinder Bore Diameter .... 93.010 t .0075 111111.(3.6619 2 0.0003 in.)DESCRIPTIONSPECIFICATIONOut of Round (Max) ...... 0.076 mm (0.003 in.)Taper (Max) ............ 0.05 1 mm (0.002 in.)PistonsType Material ............... Aluminum alloy 'Piston diameter ........ 92.975 mm (3.6605 in.)Clearance at Size Location .. 0.0198 - 0.0501 mmPiston WeightPiston Ring Groove Diameter(0.0008 - 0.0020 in.).................... 367.5 grams ( 12.96 02.1NO. 1 ...... 83.73 - 83.97 mm (3.296 - 3.269 in.)NO. 2 .... 82.833 - 83.033 mm(3.261 - 3.310 in.)NO. 3 ...... 83.88 - 84.08 mm (3.302 - 3.310 in.)Piston PinsType .......................... Pressed FitClearance In Piston ......... 0.018 - 0.019 mm(0.0008 in.)Diameter, ............... 24.008 - 24.013 mm(0.9452- 0.9454 in.)Piston RingsRing Gap Top CompressionRing. ..... 0.37 - 0.63 mm (0.0146- 0.0249 in.)Ring Gap 2nd CompressionRing. ..... 0.37 - 0.63 mm (0.0146- 0.0249 in.)Ring Gap Oil Control(Steel Rails) . . 0.25 - 1.27 mm (0.0099- 0.05 in.)Ring Side Clearance'Ibp Compression Ring. ........ .051- .lo4 mm(0.0020- 0.0041 in.)Second Compression Ring. .... 0.040 - 0.080 mm(0.0016- 0.0032 in.)Oil Ring (SteelRails). ..... .019- .229 mm LO007 - .0091 in.)Ring WidthTop Compression Ring ....... 1.472 - 1.490 mm(0.057- 0.058h.)2nd Compression Ring ....... 1.472 - 1.490 mm(0.057 - 0.058in.)Oil Ring (Steel Rails). ....... 0.445 - 0.470 mm( 0.017 - 0.018 in.)Connecting RodsBearing Clearance .......... 0.010 - 0.048 mm(0.0004- 0,0019 in.)Side Clearance .............. 0.10 - 0.35 mm(0.004- 0.0138 in.)Piston Pin BoreDiameter ....... Interference fit .022- .045 mm(0.0009 - 0.0018 in.)Bearing Bore Out of bund(Max. Allowable) ............. 0.004 mm ( in.)Total Weight (Less Bearing) ......... 578 grams(20.388 ounces)Crankshaft Main Bearing JournalsDiameter. ............... 63.488 - 63.512 mm(2.4996 - 2.5005 in.)Bearing Clearance .......... 0.004 - 0.032 mm(0.0002 - 0.0013 in.)Out of Round (Max.) ...... 0.005 mm (0.0002 in.)Taper (Max.) ............ 0.008 mm (0.0004 in.)End Play. ................. 0.052 - 0.282 mm(0.0021 - 0.0112 in.)End Play (Max. Allowable) .......... 0.282 mmConnecting Rod Journals(0.0112 in.)Diameter. ............... 50.992 - 51.008 mm(2.0076 - 2.0082 in.)Bearing Clearance .......... 0.010 - 0.048 mm(0.0004 - 0.0019 in.)Out Of Round (Max.)..... 0.005 mm (0.0002 in.)Taper (Max.) ............ 0.008 mm (0.0004 in.)CamshaftBore Diameter ............. 26.02 - 26.04111113(1.0245- 1.0252 in.)Bearing Journal Diameter .. 25.975 - 25.995 mm(1.0227- 1.0235 in.)Bearing Clearance .......... 0.025 - 0.065 mm(0.001- 0.0026 in.)Bearing Clearance (Max. Allowable) ... 0.065 mm(0.0026 in.)End Play ........................ mm (in.)Valve Timing Intake ValveOpens (ATDC) ........................ 3.5"Closes (ATDC) ........................ 247"Duration ........................... 243.5"..T - T T